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  • null values from listbox, are not evaluated in the model binding of ASP.NET-MVC

    - by Jorge
    The model validation doesn't evaluates the attributes linked to listbox values if you don't select at least one of them. This way is not possible to do a model evaluation using DataAnnotations in order to inform required values. The controller: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using TestValidation.Models; namespace TestValidation.Controllers { [HandleError] public class HomeController : Controller { private SelectList list = new SelectList(new List<string>() { "Sao Paulo", "Toronto", "New York", "Vancouver" }); public ActionResult Index() { ViewData["ModelState"] = "NOT EVAL"; ViewData["ItemsList"] = list; return View(); } [AcceptVerbs(HttpVerbs.Post)] public ActionResult Index(MyEntity entity) { if (ModelState.IsValid) { ViewData["ModelState"] = "VALID"; } else { ViewData["ModelState"] = "NOT VALID!!!"; } ViewData["ItemsList"] = list; return View(); } public ActionResult About() { return View(); } } } The View: <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<TestValidation.Models.MyEntity>" %> <asp:Content ID="indexTitle" ContentPlaceHolderID="TitleContent" runat="server"> Home Page </asp:Content> <asp:Content ID="indexContent" ContentPlaceHolderID="MainContent" runat="server"> <h2> Validation Test</h2> <p> <% using (Html.BeginForm()) {%> <fieldset> <p> ModelState: <%= Html.Encode((string)ViewData["ModelState"])%> </p> <p> <label for="Name"> Name:</label> <%= Html.TextBoxFor(m => m.Name)%> <%= Html.ValidationMessageFor(m => m.Name)%> </p> <p> <label for="ItemFromList"> Items (list):</label> <%= Html.ListBoxFor(m => m.ItemFromList, ViewData["ItemsList"] as SelectList)%> <%= Html.ValidationMessageFor(m => m.ItemFromList)%> </p> <p> <label for="ItemFromCombo"> Items (combo):</label> <%= Html.DropDownListFor(m => m.ItemFromCombo, ViewData["ItemsList"] as SelectList)%> <%= Html.ValidationMessageFor(m => m.ItemFromCombo)%> </p> <p> <input type="submit" value="Submit" /> </p> </fieldset> <% } %> </asp:Content> The Model: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.ComponentModel.DataAnnotations; namespace TestValidation.Models { public class MyEntity_Validate : ValidationAttribute { public MyEntity_Validate() { this.ErrorMessage = "Validated!. Is <> Toronto"; } public override bool IsValid(object value) { return ((string)value == "Toronto"); } } public class MyEntity { [Required] public string Name { get; set; } [MyEntity_Validate] public string ItemFromList { get; set; } [MyEntity_Validate] public string ItemFromCombo { get; set; } } } Any help would be very much appreciated. Thank you.

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  • Binding data to subgrid

    - by bhargav
    i have a jqgrid with a subgrid...the databinding is done in javascript like this <script language="javascript" type="text/javascript"> var x = screen.width; $(document).ready(function () { $("#projgrid").jqGrid({ mtype: 'POST', datatype: function (pdata) { getData(pdata); }, colNames: ['Project ID', 'Due Date', 'Project Name', 'SalesRep', 'Organization:', 'Status', 'Active Value', 'Delete'], colModel: [ { name: 'Project ID', index: 'project_id', width: 12, align: 'left', key: true }, { name: 'Due Date', index: 'project_date_display', width: 15, align: 'left' }, { name: 'Project Name', index: 'project_title', width: 60, align: 'left' }, { name: 'SalesRep', index: 'Salesrep', width: 22, align: 'left' }, { name: 'Organization:', index: 'customer_company_name:', width: 56, align: 'left' }, { name: 'Status', index: 'Status', align: 'left', width: 15 }, { name: 'Active Value', index: 'Active Value', align: 'left', width: 10 }, { name: 'Delete', index: 'Delete', align: 'left', width: 10}], pager: '#proj_pager', rowList: [10, 20, 50], sortname: 'project_id', sortorder: 'asc', rowNum: 10, loadtext: "Loading....", subGrid: true, shrinkToFit: true, emptyrecords: "No records to view", width: x - 100, height: "100%", rownumbers: true, caption: 'Projects', subGridRowExpanded: function (subgrid_id, row_id) { var subgrid_table_id, pager_id; subgrid_table_id = subgrid_id + "_t"; pager_id = "p_" + subgrid_table_id; $("#" + subgrid_id).html("<table id='" + subgrid_table_id + "' class='scroll'></table><div id='" + pager_id + "' class='scroll'></div>"); jQuery("#" + subgrid_table_id).jqGrid({ mtype: 'POST', postData: { entityIndex: function () { return row_id } }, datatype: function (pdata) { getactionData(pdata); }, height: "100%", colNames: ['Event ID', 'Priority', 'Deadline', 'From Date', 'Title', 'Status', 'Hours', 'Contact From', 'Contact To'], colModel: [ { name: 'Event ID', index: 'Event ID' }, { name: 'Priority', index: 'IssueCode' }, { name: 'Deadline', index: 'IssueTitle' }, { name: 'From Date', index: 'From Date' }, { name: 'Title', index: 'Title' }, { name: 'Status', index: 'Status' }, { name: 'Hours', index: 'Hours' }, { name: 'Contact From', index: 'Contact From' }, { name: 'Contact To', index: 'Contact To' } ], caption: "Action Details", rowNum: 10, pager: '#actionpager', rowList: [10, 20, 30, 50], sortname: 'Event ID', sortorder: "desc", loadtext: "Loading....", shrinkToFit: true, emptyrecords: "No records to view", rownumbers: true, ondblClickRow: function (rowid) { } }); jQuery("#actiongrid").jqGrid('navGrid', '#actionpager', { edit: false, add: false, del: false, search: false }); } }); jQuery("#projgrid").jqGrid('navGrid', '#proj_pager', { edit: false, add: false, del: false, excel: true, search: false }); }); function getactionData(pdata) { var project_id = pdata.entityIndex(); var ChannelContact = document.getElementById('ctl00_ContentPlaceHolder2_ddlChannelContact').value; var HideCompleted = document.getElementById('ctl00_ContentPlaceHolder2_chkHideCompleted').checked; var Scm = document.getElementById('ctl00_ContentPlaceHolder2_chkScm').checked; var checkOnlyContact = document.getElementById('ctl00_ContentPlaceHolder2_chkOnlyContact').checked; var MerchantId = document.getElementById('ctl00_ContentPlaceHolder2_ucProjectDetail_hidden_MerchantId').value; var nrows = pdata.rows; var npage = pdata.page; var sortindex = pdata.sidx; var sortdir = pdata.sord; var path = "project_brow.aspx/GetActionDetails" $.ajax({ type: "POST", url: path, data: "{'project_id': '" + project_id + "','ChannelContact': '" + ChannelContact + "','HideCompleted': '" + HideCompleted + "','Scm': '" + Scm + "','checkOnlyContact': '" + checkOnlyContact + "','MerchantId': '" + MerchantId + "','nrows': '" + nrows + "','npage': '" + npage + "','sortindex': '" + sortindex + "','sortdir': '" + sortdir + "'}", contentType: "application/json; charset=utf-8", success: function (data, textStatus) { if (textStatus == "success") obj = jQuery.parseJSON(data.d) ReceivedData(obj); }, error: function (data, textStatus) { alert('An error has occured retrieving data!'); } }); } function ReceivedData(data) { var thegrid = jQuery("#actiongrid")[0]; thegrid.addJSONData(data); } function getData(pData) { var dtDateFrom = document.getElementById('ctl00_ContentPlaceHolder2_dtDateFrom_textBox').value; var dtDateTo = document.getElementById('ctl00_ContentPlaceHolder2_dtDateTo_textBox').value; var Status = document.getElementById('ctl00_ContentPlaceHolder2_ddlStatus').value; var Type = document.getElementById('ctl00_ContentPlaceHolder2_ddlType').value; var Channel = document.getElementById('ctl00_ContentPlaceHolder2_ddlChannel').value; var ChannelContact = document.getElementById('ctl00_ContentPlaceHolder2_ddlChannelContact').value; var Customers = document.getElementById('ctl00_ContentPlaceHolder2_txtCustomers').value; var KeywordSearch = document.getElementById('ctl00_ContentPlaceHolder2_txtKeywordSearch').value; var Scm = document.getElementById('ctl00_ContentPlaceHolder2_chkScm').checked; var HideCompleted = document.getElementById('ctl00_ContentPlaceHolder2_chkHideCompleted').checked; var SelectedCustomerId = document.getElementById("<%=hdnSelectedCustomerId.ClientID %>").value var MerchantId = document.getElementById('ctl00_ContentPlaceHolder2_ucProjectDetail_hidden_MerchantId').value; var nrows = pData.rows; var npage = pData.page; var sortindex = pData.sidx; var sortdir = pData.sord; PageMethods.GetProjectDetails(SelectedCustomerId, Customers, KeywordSearch, MerchantId, Channel, Status, Type, dtDateTo, dtDateFrom, ChannelContact, HideCompleted, Scm, nrows, npage, sortindex, sortdir, AjaxSucceeded, AjaxFailed); } function AjaxSucceeded(data) { var obj = jQuery.parseJSON(data) if (obj != null) { if (obj.records!="") { ReceivedClientData(obj); } else { alert('No Data Available to Display') } } } function AjaxFailed(data) { alert('An error has occured retrieving data!'); } function ReceivedClientData(data) { var thegrid = jQuery("#projgrid")[0]; thegrid.addJSONData(data); } </script> as u can see projgrid is my parent grid and action grid is my subgrid to be shown onclicking the '+' symbol Projgrid is binded and being displayed but when it comes to subgrid im able to get the data but the problem comes at the time of binding data to subgrid which is done in function named ReceivedData where you can see like this function ReceivedData(data) { var thegrid = jQuery("#actiongrid")[0]; thegrid.addJSONData(data); } "data" is what i wanted exactly but it cannot be binded to actiongrid which is the subgrid Thanx in advance for help

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  • problem with sqldatasource and data binding

    - by Alexander
    I am trying to pull out data from the table I had from the database according to the id which is passed from the URL. However I always get data from id= 1? Why? FYI I took this code directly from the ClubWebsite starter kit and copy and paste it to my project to make several changes, the ClubWebsite one worked fine.. but this one doesn't and can't find any reason why because they both looked exactly the same. <%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Events_View.aspx.cs" Inherits="Events_View" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="splash" Runat="Server"> <div id="splash4">&nbsp;</div> </asp:Content> <asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> <div id="content"> <div class="post"> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ClubDatabase %>" SelectCommand="SELECT dbo.Events.id, dbo.Events.starttime, dbo.events.endtime, dbo.Events.title, dbo.Events.description, dbo.Events.staticURL, dbo.Events.address FROM dbo.Events"> <SelectParameters> <asp:Parameter Type="Int32" DefaultValue="1" Name="id"></asp:Parameter> </SelectParameters> </asp:SqlDataSource> <asp:FormView ID="FormView1" runat="server" DataSourceID="SqlDataSource1" DataKeyNames="id" AllowPaging="false" Width="100%"> <ItemTemplate> <h2> <asp:Label Text='<%# Eval("title") %>' runat="server" ID="titleLabel" /> </h2> <div> <br /> <p> <asp:Label Text='<%# Eval("address") %>' runat="server" ID="addressLabel" /> </p> <p> <asp:Label Text='<%# Eval("starttime","{0:D}") %>' runat="server" ID="itemdateLabel" /> <br /> <asp:Label Text='<%# ShowDuration(Eval("starttime"),Eval("endtime")) %>' runat="server" ID="Label1" /> </p> </div> <p> <asp:Label Text='<%# Eval("description") %>' runat="server" ID="descriptionLabel" /> </p> </ItemTemplate> </asp:FormView> <div class="dashedline"> </div> </div> </div> </asp:Content> using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.SqlClient; using System.Configuration; using System.Data; public partial class Events_View : System.Web.UI.Page { const int INVALIDID = -1; protected void Page_Load(object sender, System.EventArgs e) { SqlDataSource1.SelectParameters["id"].DefaultValue = System.Convert.ToString(EventID); } public int EventID { get { int m_EventID; object id = ViewState["EventID"]; if (id != null) { m_EventID = (int)id; } else { id = Request.QueryString["EventID"]; if (id != null) { m_EventID = System.Convert.ToInt32(id); } else { m_EventID = 1; } ViewState["EventID"] = m_EventID; } return m_EventID; } set { ViewState["EventID"] = value; } } protected void FormView1_DataBound(object sender, System.EventArgs e) { DataRowView view = (DataRowView)(FormView1.DataItem); object o = view["staticURL"]; if (o != null && o != DBNull.Value) { string staticurl = (string)o; if (staticurl != "") { Response.Redirect(staticurl); } } } protected string ShowLocationLink(object locationname, object id) { if (id != null && id != DBNull.Value) { return "At <a href='Locations_view.aspx?LocationID=" + Convert.ToString(id) + "'>" + (string)locationname + "</a><br/>"; } else { return ""; } } protected string ShowDuration(object starttime, object endtime) { DateTime starttimeDT = (DateTime)starttime; if (endtime != null && endtime != DBNull.Value) { DateTime endtimeDT = (DateTime)endtime; if (starttimeDT.Date == endtimeDT.Date) { if (starttimeDT == endtimeDT) { return starttimeDT.ToString("h:mm tt"); } else { return starttimeDT.ToString("h:mm tt") + " - " + endtimeDT.ToString("h:mm tt"); } } else { return "thru " + endtimeDT.ToString("M/d/yy"); } } else { return starttimeDT.ToString("h:mm tt"); } } }

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  • custom tabbars and make them circulate

    - by pengwang
    i want to custom tabbars and want to circulate slide,default tab bar only have 5 items show at the same time,it not meet me,i have 11 items,so i want to make 3 tabbars ,every have 5 items,for example A(0-4)--B(5-9)--C(10)--A--B--C--A. at print i only finish A(0-4)--B(5-9)--C(10),how to make them circulate? my code : .h file #import <UIKit/UIKit.h> @protocol InfiniTabBarDelegate; @interface InfiniTabBar : UIScrollView <UIScrollViewDelegate, UITabBarDelegate> { __weak id <InfiniTabBarDelegate> infiniTabBarDelegate; NSMutableArray *tabBars; UITabBar *aTabBar; UITabBar *bTabBar; } @property (nonatomic, weak) id infiniTabBarDelegate; @property (strong,nonatomic) NSMutableArray *tabBars; @property (strong,nonatomic) UITabBar *aTabBar; @property (strong,nonatomic) UITabBar *bTabBar; - (id)initWithItems:(NSArray *)items; - (void)setBounces:(BOOL)bounces; // Don't set more items than initially - (void)setItems:(NSArray *)items animated:(BOOL)animated; - (int)currentTabBarTag; - (int)selectedItemTag; - (BOOL)scrollToTabBarWithTag:(int)tag animated:(BOOL)animated; - (BOOL)selectItemWithTag:(int)tag; @end @protocol InfiniTabBarDelegate <NSObject> - (void)infiniTabBar:(InfiniTabBar *)tabBar didScrollToTabBarWithTag:(int)tag; - (void)infiniTabBar:(InfiniTabBar *)tabBar didSelectItemWithTag:(int)tag; @end .m file @implementation InfiniTabBar @synthesize infiniTabBarDelegate; @synthesize tabBars; @synthesize aTabBar; @synthesize bTabBar; - (id)initWithItems:(NSArray *)items { self = [super initWithFrame:CGRectMake(0.0, 411.0, 320.0, 49.0)]; // TODO: //self = [super initWithFrame:CGRectMake(self.superview.frame.origin.x + self.superview.frame.size.width - 320.0, self.superview.frame.origin.y + self.superview.frame.size.height - 49.0, 320.0, 49.0)]; // Doesn't work. self is nil at this point. if (self) { self.pagingEnabled = YES; self.delegate = self; self.tabBars = [[NSMutableArray alloc] init]; float x = 0.0; for (double d = 0; d < ceil(items.count / 5.0); d ++) { UITabBar *tabBar = [[UITabBar alloc] initWithFrame:CGRectMake(x, 0.0, 320.0, 49.0)]; tabBar.delegate = self; int len = 0; for (int i = d * 5; i < d * 5 + 5; i ++) if (i < items.count) len ++; tabBar.items = [items objectsAtIndexes:[NSIndexSet indexSetWithIndexesInRange:NSMakeRange(d * 5, len)]]; // NSLog(@"####%@",NSMakeRange(d * 5, len)); [self.tabBars addObject:tabBar]; [self addSubview:tabBar]; x += 320.0; } self.contentSize = CGSizeMake(x, 49.0); } return self; } - (void)setBounces:(BOOL)bounces { if (bounces) { int count = self.tabBars.count; if (count > 0) { if (self.aTabBar == nil) self.aTabBar = [[UITabBar alloc] initWithFrame:CGRectMake(-320.0, 0.0, 320.0, 49.0)]; [self addSubview:self.aTabBar]; if (self.bTabBar == nil) self.bTabBar = [[UITabBar alloc] initWithFrame:CGRectMake(count * 320.0, 0.0, 320.0, 49.0)]; [self addSubview:self.bTabBar]; } } else { [self.aTabBar removeFromSuperview]; [self.bTabBar removeFromSuperview]; } [super setBounces:bounces]; } - (void)setItems:(NSArray *)items animated:(BOOL)animated { for (UITabBar *tabBar in self.tabBars) { int len = 0; for (int i = [self.tabBars indexOfObject:tabBar] * 5; i < [self.tabBars indexOfObject:tabBar] * 5 + 5; i ++) if (i < items.count) len ++; [tabBar setItems:[items objectsAtIndexes:[NSIndexSet indexSetWithIndexesInRange:NSMakeRange([self.tabBars indexOfObject:tabBar] * 5, len)]] animated:animated]; } self.contentSize = CGSizeMake(ceil(items.count / 5.0) * 320.0, 49.0); } - (int)currentTabBarTag { return self.contentOffset.x / 320.0; } - (int)selectedItemTag { for (UITabBar *tabBar in self.tabBars) if (tabBar.selectedItem != nil) return tabBar.selectedItem.tag; // No item selected return 0; } - (BOOL)scrollToTabBarWithTag:(int)tag animated:(BOOL)animated { for (UITabBar *tabBar in self.tabBars) if ([self.tabBars indexOfObject:tabBar] == tag) { UITabBar *tabBar = [self.tabBars objectAtIndex:tag]; [self scrollRectToVisible:tabBar.frame animated:animated]; if (animated == NO) [self scrollViewDidEndDecelerating:self]; return YES; } return NO; } - (BOOL)selectItemWithTag:(int)tag { for (UITabBar *tabBar in self.tabBars) for (UITabBarItem *item in tabBar.items) if (item.tag == tag) { tabBar.selectedItem = item; [self tabBar:tabBar didSelectItem:item]; return YES; } return NO; } - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { [infiniTabBarDelegate infiniTabBar:self didScrollToTabBarWithTag:scrollView.contentOffset.x / 320.0]; } - (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView { [self scrollViewDidEndDecelerating:scrollView]; } - (void)tabBar:(UITabBar *)cTabBar didSelectItem:(UITabBarItem *)item { // Act like a single tab bar for (UITabBar *tabBar in self.tabBars) if (tabBar != cTabBar) tabBar.selectedItem = nil; [infiniTabBarDelegate infiniTabBar:self didSelectItemWithTag:item.tag]; } @end

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  • Saving State Dynamic UserControls...Help!

    - by Cognitronic
    I have page with a LinkButton on it that when clicked, I'd like to add a Usercontrol to the page. I need to be able to add/remove as many controls as the user would like. The Usercontrol consists of three dropdownlists. The first dropdownlist has it's auotpostback property set to true and hooks up the OnSelectedIndexChanged event that when fired will load the remaining two dropdownlists with the appropriate values. My problem is that no matter where I put the code in the host page, the usercontrol is not being loaded properly. I know I have to recreate the usercontrols on every postback and I've created a method that is being executed in the hosting pages OnPreInit method. I'm still getting the following error: The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases. Here is my code: Thank you!!!! bool createAgain = false; IList<FilterOptionsCollectionView> OptionControls { get { if (SessionManager.Current["controls"] != null) return (IList<FilterOptionsCollectionView>)SessionManager.Current["controls"]; else SessionManager.Current["controls"] = new List<FilterOptionsCollectionView>(); return (IList<FilterOptionsCollectionView>)SessionManager.Current["controls"]; } set { SessionManager.Current["controls"] = value; } } protected void Page_Load(object sender, EventArgs e) { Master.Page.Title = Title; LoadViewControls(Master.MainContent, Master.SideBar, Master.ToolBarContainer); } protected override void OnPreInit(EventArgs e) { base.OnPreInit(e); System.Web.UI.MasterPage m = Master; Control control = GetPostBackControl(this); if ((control != null && control.ClientID == (lbAddAndCondtion.ClientID) || createAgain)) { createAgain = true; CreateUserControl(control.ID); } } protected void AddAndConditionClicked(object o, EventArgs e) { var control = LoadControl("~/Views/FilterOptionsCollectionView.ascx"); OptionControls.Add((FilterOptionsCollectionView)control); control.ID = "options" + OptionControls.Count.ToString(); phConditions.Controls.Add(control); } public event EventHandler<Insight.Presenters.PageViewArg> OnLoadData; private Control FindControlRecursive(Control root, string id) { if (root.ID == id) { return root; } foreach (Control c in root.Controls) { Control t = FindControlRecursive(c, id); if (t != null) { return t; } } return null; } protected Control GetPostBackControl(System.Web.UI.Page page) { Control control = null; string ctrlname = Page.Request.Params["__EVENTTARGET"]; if (ctrlname != null && ctrlname != String.Empty) { control = FindControlRecursive(page, ctrlname.Split('$')[2]); } else { string ctrlStr = String.Empty; Control c = null; foreach (string ctl in Page.Request.Form) { if (ctl.EndsWith(".x") || ctl.EndsWith(".y")) { ctrlStr = ctl.Substring(0, ctl.Length - 2); c = page.FindControl(ctrlStr); } else { c = page.FindControl(ctl); } if (c is System.Web.UI.WebControls.CheckBox || c is System.Web.UI.WebControls.CheckBoxList) { control = c; break; } } } return control; } protected void CreateUserControl(string controlID) { try { if (createAgain && phConditions != null) { if (OptionControls.Count > 0) { phConditions.Controls.Clear(); foreach (var c in OptionControls) { phConditions.Controls.Add(c); } } } } catch (Exception ex) { throw ex; } } Here is the usercontrol's code: <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="FilterOptionsCollectionView.ascx.cs" Inherits="Insight.Website.Views.FilterOptionsCollectionView" %> namespace Insight.Website.Views { [ViewStateModeById] public partial class FilterOptionsCollectionView : System.Web.UI.UserControl { protected void Page_Load(object sender, EventArgs e) { } protected override void OnInit(EventArgs e) { LoadColumns(); ddlColumns.SelectedIndexChanged += new RadComboBoxSelectedIndexChangedEventHandler(ColumnsSelectedIndexChanged); base.OnInit(e); } protected void ColumnsSelectedIndexChanged(object o, EventArgs e) { LoadCriteria(); } public void LoadColumns() { ddlColumns.DataSource = User.GetItemSearchProperties(); ddlColumns.DataTextField = "SearchColumn"; ddlColumns.DataValueField = "CriteriaSearchControlType"; ddlColumns.DataBind(); LoadCriteria(); } private void LoadCriteria() { var controlType = User.GetItemSearchProperties()[ddlColumns.SelectedIndex].CriteriaSearchControlType; var ops = User.GetItemSearchProperties()[ddlColumns.SelectedIndex].ValidOperators; ddlOperators.DataSource = ops; ddlOperators.DataTextField = "key"; ddlOperators.DataValueField = "value"; ddlOperators.DataBind(); switch (controlType) { case ResourceStrings.ViewFilter_ControlTypes_DDL: criteriaDDL.Visible = true; criteriaText.Visible = false; var crit = User.GetItemSearchProperties()[ddlColumns.SelectedIndex].SearchCriteria; ddlCriteria.DataSource = crit; ddlCriteria.DataBind(); break; case ResourceStrings.ViewFilter_ControlTypes_Text: criteriaDDL.Visible = false; criteriaText.Visible = true; break; } } public event EventHandler OnColumnChanged; public ISearchCriterion FilterOptionsValues { get; set; } } }

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  • Spring ResourceServlet throws too many open files exception in jetty and tomcat under linux

    - by atomsfat
    I was running the petclinic example that was created with spring roo, also I test booking-mvc example that comes whit spring webflow 2.0.9 and the same happens, this is when I reload the main page many times. If I remove the lines from both examples there is no error. < spring:theme code="styleSheet" var="theme_css"/> <spring:url value="/${theme_css}" var="theme_css_url"/> <spring:url value="/resources/dojo/dojo.js" var="dojo_url"/> <spring:url value="/resources/dijit/themes/tundra/tundra.css" var="tundra_url"/> <spring:url value="/resources/spring/Spring.js" var="spring_url"/> <spring:url value="/resources/spring/Spring-Dojo.js" var="spring_dojo_url"/> <spring:url value="/static/images/favicon.ico" var="favicon" /> <link rel="stylesheet" type="text/css" media="screen" href="${theme_css_url}"><!-- //required for FF3 and Opera --></link> <link rel="stylesheet" type="text/css" href="${tundra_url}"><!-- //required for FF3 and Opera --></link> <link rel="SHORTCUT ICON" href="${favicon}" /> <script src="${dojo_url}" type="text/javascript" ><!-- //required for FF3 and Opera --></script> <script src="${spring_url}" type="text/javascript"><!-- //required for FF3 and Opera --></script> <script src="${spring_dojo_url}" type="text/javascript"><!-- //required for FF3 and Opera --></script> <script language="JavaScript" type="text/javascript">dojo.require("dojo.parser");</script> So I can deduce that this is something related with this servlet <servlet> <servlet-name>Resource Servlet</servlet-name> <servlet-class>org.springframework.js.resource.ResourceServlet</servlet-class> </servlet> <!-- Map all /resources requests to the Resource Servlet for handling --> <servlet-mapping> <servlet-name>Resource Servlet</servlet-name> <url-pattern>/resources/*</url-pattern> </servlet-mapping> Running the example injetty 6.1.10, tomcat 1.6, in fedora 12 with java 1.6.20, make errors. but in aix and websphere no errors, and tomcat 1.6 and windows no errors, I think that this is something related with linux. STACKTRACE 2010-05-21 12:53:07.733::WARN: Nested in org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.apache.tiles.impl.CannotRenderException: ServletException including path '/WEB-INF/layouts/default.jspx'.: org.apache.tiles.impl.CannotRenderException: ServletException including path '/WEB-INF/layouts/default.jspx'. at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:691) at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:643) at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:626) at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:322) at org.springframework.web.servlet.view.tiles2.TilesView.renderMergedOutputModel(TilesView.java:100) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1060) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:798) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:285) at org.mortbay.jetty.servlet.Dispatcher.error(Dispatcher.java:135) at org.mortbay.jetty.servlet.ErrorPageErrorHandler.handle(ErrorPageErrorHandler.java:121) at org.mortbay.jetty.Response.sendError(Response.java:274) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:429) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:324) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) Caused by: org.apache.tiles.util.TilesIOException: ServletException including path '/WEB-INF/layouts/default.jspx'. at org.apache.tiles.servlet.context.ServletUtil.wrapServletException(ServletUtil.java:232) at org.apache.tiles.servlet.context.ServletTilesRequestContext.forward(ServletTilesRequestContext.java:243) at org.apache.tiles.servlet.context.ServletTilesRequestContext.dispatch(ServletTilesRequestContext.java:222) at org.apache.tiles.renderer.impl.TemplateAttributeRenderer.write(TemplateAttributeRenderer.java:44) at org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:103) at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:669) at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:689) ... 38 more Caused by: java.io.FileNotFoundException: /home/tsalazar/Workspace/test/roo_clinic/src/main/webapp/WEB-INF/web.xml (Too many open files) at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream.<init>(FileInputStream.java:106) at java.io.FileInputStream.<init>(FileInputStream.java:66) at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:70) at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:161) at java.net.URL.openStream(URL.java:1010) at org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:114) at org.apache.jasper.compiler.JspConfig.init(JspConfig.java:295) at org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:360) at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:141) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:409) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:344) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:470) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:364) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:285) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126) at org.apache.tiles.servlet.context.ServletTilesRequestContext.forward(ServletTilesRequestContext.java:241) ... 43 more

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  • CURL Authentication being lost?

    - by John Sloan
    I am authenticating a login via CURL just fine. I have a variable I am using to display the returned HTML, and it is returning my user control panel as if I am logged in. After authenticating, I want to communicate variables with a form on another page within the site; but for some reason the HTML from that page is returning a non-authenticated version of the header (as if the original authentication never took place.) I have a cookies.txt file with 777 permissions, and have tried just getting the contents of the same page shown when I authenticate and it is as if I am losing any associated session/cookie data somewhere along the way. Here is my curl.class file - <? class Curl { public $cookieJar = ""; // Make sure the cookies.txt file is read/write permissions public function __construct($cookieJarFile = 'cookies.txt') { $this->cookieJar = $cookieJarFile; } function setup() { $header = array(); $header[0] = "Accept: text/xml,application/xml,application/xhtml+xml,"; $header[0] .= "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"; $header[] = "Cache-Control: max-age=0"; $header[] = "Connection: keep-alive"; $header[] = "Keep-Alive: 300"; $header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7"; $header[] = "Accept-Language: en-us,en;q=0.5"; $header[] = "Pragma: "; // browsers keep this blank. curl_setopt($this->curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7'); curl_setopt($this->curl, CURLOPT_HTTPHEADER, $header); curl_setopt($this->curl, CURLOPT_COOKIEJAR, $this->cookieJar); curl_setopt($this->curl, CURLOPT_COOKIEFILE, $this->cookieJar); curl_setopt($this->curl, CURLOPT_AUTOREFERER, true); curl_setopt($this->curl, CURLOPT_COOKIESESSION, true); curl_setopt($this->curl, CURLOPT_FOLLOWLOCATION, true); curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true); } function get($url) { $this->curl = curl_init($url); $this->setup(); return $this->request(); } function getAll($reg, $str) { preg_match_all($reg, $str, $matches); return $matches[1]; } function postForm($url, $fields, $referer = '') { $this->curl = curl_init($url); $this->setup(); curl_setopt($this->curl, CURLOPT_URL, $url); curl_setopt($this->curl, CURLOPT_POST, 1); curl_setopt($this->curl, CURLOPT_REFERER, $referer); curl_setopt($this->curl, CURLOPT_POSTFIELDS, $fields); return $this->request(); } function getInfo($info) { $info = ($info == 'lasturl') ? curl_getinfo($this->curl, CURLINFO_EFFECTIVE_URL) : curl_getinfo($this->curl, $info); return $info; } function request() { return curl_exec($this->curl); } } ?> And here is my curl.php file - <? include('curl.class.php'); // This path would change to where you store the file $curl = new Curl(); $url = "http://www.site.com/public/member/signin"; $fields = "MAX_FILE_SIZE=50000000&dado_form_3=1&member[email]=email&member[password]=pass&x=16&y=5&member[persistent]=true"; // Calling URL $referer = "http://www.site.com/public/member/signin"; $html = $curl->postForm($url, $fields, $referer); echo($html); ?> <hr style="clear:both;"/> <? $html = $curl->postForm('http://www.site.com/index.php','nid=443&sid=733005&tab=post&eval=yes&ad=&MAX_FILE_SIZE=10000000&ip=63.225.235.30','http://www.site.com/public/member/signin'); echo $html; // This will show you the HTML of the current page you and logged into ?> Any ideas?

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  • iPhone OpenGL ES freezes for no reason

    - by KJ
    Hi, I'm quite new to iPhone OpenGL ES, and I'm really stuck. I was trying to implement shadow mapping on iPhone, and I allocated two 512*1024*32bit textures for the shadow map and the diffuse map respectively. The problem is that my application started to freeze and reboot the device after I added the shadow map allocation part to the code (so I guess the shadow map allocation is causing all this mess). It happens randomly, but mostly within 10 minutes. (sometimes within a few secs) And it only happens on the real iPhone device, not on the virtual device. I backtracked the problem by removing irrelevant code lines by lines and now my code is really simple, but it's still crashing (I mean, freezing). Could anybody please download my xcode project linked below and see what on earth is wrong? The code is really simple: http://www.tempfiles.net/download/201004/95922/CrashTest.html I would really appreciate if someone can help me. My iPhone is a 3GS and running on the OS version 3.1. Again, run the code and it'll take about 5 mins in average for the device to freeze and reboot. (Don't worry, it does no harm) It'll just display cyan screen before it freezes, but you'll be able to notice when it happens because the device will reboot soon, so please be patient. Just in case you can't reproduce the problem, please let me know. (That could possibly mean it's specifically my device that something's wrong with) Observation: The problem goes away when I change the size of the shadow map to 512*512. (but with the diffuse map still 512*1024) I'm desperate for help, thanks in advance! Just for the people's information who can't download the link, here is the OpenGL code: #import "GLView.h" #import <OpenGLES/ES2/glext.h> #import <QuartzCore/QuartzCore.h> @implementation GLView + (Class)layerClass { return [CAEAGLLayer class]; } - (id)initWithCoder: (NSCoder*)coder { if ((self = [super initWithCoder:coder])) { CAEAGLLayer* layer = (CAEAGLLayer*)self.layer; layer.opaque = YES; layer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool: NO], kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil]; displayLink_ = nil; context_ = [[EAGLContext alloc] initWithAPI: kEAGLRenderingAPIOpenGLES2]; if (!context_ || ![EAGLContext setCurrentContext: context_]) { [self release]; return nil; } glGenFramebuffers(1, &framebuffer_); glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_); glViewport(0, 0, self.bounds.size.width, self.bounds.size.height); glGenRenderbuffers(1, &defaultColorBuffer_); glBindRenderbuffer(GL_RENDERBUFFER, defaultColorBuffer_); [context_ renderbufferStorage: GL_RENDERBUFFER fromDrawable: layer]; glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, defaultColorBuffer_); glGenTextures(1, &shadowColorBuffer_); glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, shadowColorBuffer_); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 512, 1024, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); glGenTextures(1, &texture_); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture_); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 512, 1024, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); } return self; } - (void)startAnimation { displayLink_ = [CADisplayLink displayLinkWithTarget: self selector: @selector(drawView:)]; [displayLink_ setFrameInterval: 1]; [displayLink_ addToRunLoop: [NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; } - (void)useDefaultBuffers { glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, defaultColorBuffer_); glClearColor(0.0, 0.8, 0.8, 1); glClear(GL_COLOR_BUFFER_BIT); } - (void)useShadowBuffers { glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, shadowColorBuffer_, 0); glClearColor(0, 0, 0, 0); glClear(GL_COLOR_BUFFER_BIT); } - (void)drawView: (id)sender { NSTimeInterval startTime = [NSDate timeIntervalSinceReferenceDate]; [EAGLContext setCurrentContext: context_]; [self useShadowBuffers]; [self useDefaultBuffers]; glBindRenderbuffer(GL_RENDERBUFFER, defaultColorBuffer_); [context_ presentRenderbuffer: GL_RENDERBUFFER]; NSTimeInterval endTime = [NSDate timeIntervalSinceReferenceDate]; NSLog(@"FPS : %.1f", 1 / (endTime - startTime)); } - (void)stopAnimation { [displayLink_ invalidate]; displayLink_ = nil; } - (void)dealloc { if (framebuffer_) glDeleteFramebuffers(1, &framebuffer_); if (defaultColorBuffer_) glDeleteRenderbuffers(1, &defaultColorBuffer_); if (shadowColorBuffer_) glDeleteTextures(1, &shadowColorBuffer_); glDeleteTextures(1, &texture_); if ([EAGLContext currentContext] == context_) [EAGLContext setCurrentContext: nil]; [context_ release]; context_ = nil; [super dealloc]; } @end

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  • Problem setting output flags for ALU in "Nand to Tetris" course

    - by MahlerFive
    Although I tagged this homework, it is actually for a course which I am doing on my own for free. Anyway, the course is called "From Nand to Tetris" and I'm hoping someone here has seen or taken the course so I can get some help. I am at the stage where I am building the ALU with the supplied hdl language. My problem is that I can't get my chip to compile properly. I am getting errors when I try to set the output flags for the ALU. I believe the problem is that I can't subscript any intermediate variable, since when I just try setting the flags to true or false based on some random variable (say an input flag), I do not get the errors. I know the problem is not with the chips I am trying to use since I am using all builtin chips. Here is my ALU chip so far: /** * The ALU. Computes a pre-defined set of functions out = f(x,y) * where x and y are two 16-bit inputs. The function f is selected * by a set of 6 control bits denoted zx, nx, zy, ny, f, no. * The ALU operation can be described using the following pseudocode: * if zx=1 set x = 0 // 16-bit zero constant * if nx=1 set x = !x // Bit-wise negation * if zy=1 set y = 0 // 16-bit zero constant * if ny=1 set y = !y // Bit-wise negation * if f=1 set out = x + y // Integer 2's complement addition * else set out = x & y // Bit-wise And * if no=1 set out = !out // Bit-wise negation * * In addition to computing out, the ALU computes two 1-bit outputs: * if out=0 set zr = 1 else zr = 0 // 16-bit equality comparison * if out<0 set ng = 1 else ng = 0 // 2's complement comparison */ CHIP ALU { IN // 16-bit inputs: x[16], y[16], // Control bits: zx, // Zero the x input nx, // Negate the x input zy, // Zero the y input ny, // Negate the y input f, // Function code: 1 for add, 0 for and no; // Negate the out output OUT // 16-bit output out[16], // ALU output flags zr, // 1 if out=0, 0 otherwise ng; // 1 if out<0, 0 otherwise PARTS: // Zero the x input Mux16( a=x, b=false, sel=zx, out=x2 ); // Zero the y input Mux16( a=y, b=false, sel=zy, out=y2 ); // Negate the x input Not16( in=x, out=notx ); Mux16( a=x, b=notx, sel=nx, out=x3 ); // Negate the y input Not16( in=y, out=noty ); Mux16( a=y, b=noty, sel=ny, out=y3 ); // Perform f Add16( a=x3, b=y3, out=addout ); And16( a=x3, b=y3, out=andout ); Mux16( a=andout, b=addout, sel=f, out=preout ); // Negate the output Not16( in=preout, out=notpreout ); Mux16( a=preout, b=notpreout, sel=no, out=out ); // zr flag Or8way( in=out[0..7], out=zr1 ); // PROBLEM SHOWS UP HERE Or8way( in=out[8..15], out=zr2 ); Or( a=zr1, b=zr2, out=zr ); // ng flag Not( in=out[15], out=ng ); } So the problem shows up when I am trying to send a subscripted version of 'out' to the Or8Way chip. I've tried using a different variable than 'out', but with the same problem. Then I read that you are not able to subscript intermediate variables. I thought maybe if I sent the intermediate variable to some other chip, and that chip subscripted it, it would solve the problem, but it has the same error. Unfortunately I just can't think of a way to set the zr and ng flags without subscripting some intermediate variable, so I'm really stuck! Just so you know, if I replace the problematic lines with the following, it will compile (but not give the right results since I'm just using some random input): // zr flag Not( in=zx, out=zr ); // ng flag Not( in=zx, out=ng ); Anyone have any ideas? Edit: Here is the appendix of the book for the course which specifies how the hdl works. Specifically look at section 5 which talks about buses and says: "An internal pin (like v above) may not be subscripted". Edit: Here is the exact error I get: "Line 68, Can't connect gate's output pin to part". The error message is sort of confusing though, since that does not seem to be the actual problem. If I just replace "Or8way( in=out[0..7], out=zr1 );" with "Or8way( in=false, out=zr1 );" it will not generate this error, which is what lead me to look up in the appendix and find that the out variable, since it was derived as intermediate, could not be subscripted.

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  • What strategy do you use for package naming in Java projects and why?

    - by Tim Visher
    I thought about this awhile ago and it recently resurfaced as my shop is doing its first real Java web app. As an intro, I see two main package naming strategies. (To be clear, I'm not referring to the whole 'domain.company.project' part of this, I'm talking about the package convention beneath that.) Anyway, the package naming conventions that I see are as follows: Functional: Naming your packages according to their function architecturally rather than their identity according to the business domain. Another term for this might be naming according to 'layer'. So, you'd have a *.ui package and a *.domain package and a *.orm package. Your packages are horizontal slices rather than vertical. This is much more common than logical naming. In fact, I don't believe I've ever seen or heard of a project that does this. This of course makes me leery (sort of like thinking that you've come up with a solution to an NP problem) as I'm not terribly smart and I assume everyone must have great reasons for doing it the way they do. On the other hand, I'm not opposed to people just missing the elephant in the room and I've never heard a an actual argument for doing package naming this way. It just seems to be the de facto standard. Logical: Naming your packages according to their business domain identity and putting every class that has to do with that vertical slice of functionality into that package. I have never seen or heard of this, as I mentioned before, but it makes a ton of sense to me. I tend to approach systems vertically rather than horizontally. I want to go in and develop the Order Processing system, not the data access layer. Obviously, there's a good chance that I'll touch the data access layer in the development of that system, but the point is that I don't think of it that way. What this means, of course, is that when I receive a change order or want to implement some new feature, it'd be nice to not have to go fishing around in a bunch of packages in order to find all the related classes. Instead, I just look in the X package because what I'm doing has to do with X. From a development standpoint, I see it as a major win to have your packages document your business domain rather than your architecture. I feel like the domain is almost always the part of the system that's harder to grok where as the system's architecture, especially at this point, is almost becoming mundane in its implementation. The fact that I can come to a system with this type of naming convention and instantly from the naming of the packages know that it deals with orders, customers, enterprises, products, etc. seems pretty darn handy. It seems like this would allow you to take much better advantage of Java's access modifiers. This allows you to much more cleanly define interfaces into subsystems rather than into layers of the system. So if you have an orders subsystem that you want to be transparently persistent, you could in theory just never let anything else know that it's persistent by not having to create public interfaces to its persistence classes in the dao layer and instead packaging the dao class in with only the classes it deals with. Obviously, if you wanted to expose this functionality, you could provide an interface for it or make it public. It just seems like you lose a lot of this by having a vertical slice of your system's features split across multiple packages. I suppose one disadvantage that I can see is that it does make ripping out layers a little bit more difficult. Instead of just deleting or renaming a package and then dropping a new one in place with an alternate technology, you have to go in and change all of the classes in all of the packages. However, I don't see this is a big deal. It may be from a lack of experience, but I have to imagine that the amount of times you swap out technologies pales in comparison to the amount of times you go in and edit vertical feature slices within your system. So I guess the question then would go out to you, how do you name your packages and why? Please understand that I don't necessarily think that I've stumbled onto the golden goose or something here. I'm pretty new to all this with mostly academic experience. However, I can't spot the holes in my reasoning so I'm hoping you all can so that I can move on. Thanks in advance!

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  • Problem using Hibernate-Search

    - by KCore
    Hi, I am using hibernate search for my application. It is well configured and running perfectly till some time back, when it stopped working suddenly. The reason according to me being the number of my model (bean) classes. I have some 90 classes, which I add to my configuration, while building my Hibernate Configuration. When, I disable hibernate search (remove the search annotations and use Configuration instead of AnnotationsConfiguration), I try to start my application, it Works fine. But,the same app when I enable search, it just hangs up. I tried debugging and found the exact place where it hangs. After adding all the class to my AnnotationsConfiguration object, when I say cfg.buildSessionfactory(), It never comes out of that statement. (I have waited for hours!!!) Also when I decrease the number of my model classes (like say to half i.e. 50) it comes out of that statement and the application works fine.. Can Someone tell why is this happening?? My versions of hibernate are: hibernate-core-3.3.1.GA.jar hibernate-annotations-3.4.0.GA.jar hibernate-commons-annotations-3.1.0.GA.jar hibernate-search-3.1.0.GA.jar Also if need to avoid using AnnotationsConfiguration, I read that I need to configure the search event listeners explicitly.. can anyone list all the neccessary listeners and their respective classes? (I tried the standard ones given in Hibernate Search books, but they give me ClassNotFound exception and I have all the neccesarty libs in classpath) Here are the last few lines of hibernate trace I managed to pull : 16:09:32,814 INFO AnnotationConfiguration:369 - Hibernate Validator not found: ignoring 16:09:32,892 INFO ConnectionProviderFactory:95 - Initializing connection provider: org.hibernate.connection.C3P0ConnectionProvider 16:09:32,895 INFO C3P0ConnectionProvider:103 - C3P0 using driver: com.mysql.jdbc.Driver at URL: jdbc:mysql://localhost:3306/autolinkcrmcom_data 16:09:32,898 INFO C3P0ConnectionProvider:104 - Connection properties: {user=root, password=****} 16:09:32,900 INFO C3P0ConnectionProvider:107 - autocommit mode: false 16:09:33,694 INFO SettingsFactory:116 - RDBMS: MySQL, version: 5.1.37-1ubuntu5.1 16:09:33,696 INFO SettingsFactory:117 - JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-3.1.10 ( $Date: 2005/05/19 15:52:23 $, $Revision: 1.1.2.2 $ ) 16:09:33,701 INFO Dialect:175 - Using dialect: org.hibernate.dialect.MySQLDialect 16:09:33,707 INFO TransactionFactoryFactory:59 - Using default transaction strategy (direct JDBC transactions) 16:09:33,709 INFO TransactionManagerLookupFactory:80 - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended) 16:09:33,711 INFO SettingsFactory:170 - Automatic flush during beforeCompletion(): disabled 16:09:33,714 INFO SettingsFactory:174 - Automatic session close at end of transaction: disabled 16:09:32,814 INFO AnnotationConfiguration:369 - Hibernate Validator not found: ignoring 16:09:32,892 INFO ConnectionProviderFactory:95 - Initializing connection provider: org.hibernate.connection.C3P0ConnectionProvider 16:09:32,895 INFO C3P0ConnectionProvider:103 - C3P0 using driver: com.mysql.jdbc.Driver at URL: jdbc:mysql://localhost:3306/autolinkcrmcom_data 16:09:32,898 INFO C3P0ConnectionProvider:104 - Connection properties: {user=root, password=****} 16:09:32,900 INFO C3P0ConnectionProvider:107 - autocommit mode: false 16:09:33,694 INFO SettingsFactory:116 - RDBMS: MySQL, version: 5.1.37-1ubuntu5.1 16:09:33,696 INFO SettingsFactory:117 - JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-3.1.10 ( $Date: 2005/05/19 15:52:23 $, $Revision: 1.1.2.2 $ ) 16:09:33,701 INFO Dialect:175 - Using dialect: org.hibernate.dialect.MySQLDialect 16:09:33,707 INFO TransactionFactoryFactory:59 - Using default transaction strategy (direct JDBC transactions) 16:09:33,709 INFO TransactionManagerLookupFactory:80 - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended) 16:09:33,711 INFO SettingsFactory:170 - Automatic flush during beforeCompletion(): disabled 16:09:33,714 INFO SettingsFactory:174 - Automatic session close at end of transaction: disabled 16:09:33,716 INFO SettingsFactory:181 - JDBC batch size: 15 16:09:33,719 INFO SettingsFactory:184 - JDBC batch updates for versioned data: disabled 16:09:33,721 INFO SettingsFactory:189 - Scrollable result sets: enabled 16:09:33,723 DEBUG SettingsFactory:193 - Wrap result sets: disabled 16:09:33,725 INFO SettingsFactory:197 - JDBC3 getGeneratedKeys(): enabled 16:09:33,727 INFO SettingsFactory:205 - Connection release mode: auto 16:09:33,730 INFO SettingsFactory:229 - Maximum outer join fetch depth: 2 16:09:33,732 INFO SettingsFactory:232 - Default batch fetch size: 1000 16:09:33,735 INFO SettingsFactory:236 - Generate SQL with comments: disabled 16:09:33,737 INFO SettingsFactory:240 - Order SQL updates by primary key: disabled 16:09:33,740 INFO SettingsFactory:244 - Order SQL inserts for batching: disabled 16:09:33,742 INFO SettingsFactory:420 - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory 16:09:33,744 INFO ASTQueryTranslatorFactory:47 - Using ASTQueryTranslatorFactory 16:09:33,747 INFO SettingsFactory:252 - Query language substitutions: {} 16:09:33,750 INFO SettingsFactory:257 - JPA-QL strict compliance: disabled 16:09:33,752 INFO SettingsFactory:262 - Second-level cache: enabled 16:09:33,754 INFO SettingsFactory:266 - Query cache: disabled 16:09:33,757 INFO SettingsFactory:405 - Cache region factory : org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge 16:09:33,759 INFO RegionFactoryCacheProviderBridge:61 - Cache provider: net.sf.ehcache.hibernate.EhCacheProvider 16:09:33,762 INFO SettingsFactory:276 - Optimize cache for minimal puts: disabled 16:09:33,764 INFO SettingsFactory:285 - Structured second-level cache entries: disabled 16:09:33,766 INFO SettingsFactory:314 - Statistics: disabled 16:09:33,769 INFO SettingsFactory:318 - Deleted entity synthetic identifier rollback: disabled 16:09:33,771 INFO SettingsFactory:333 - Default entity-mode: pojo 16:09:33,774 INFO SettingsFactory:337 - Named query checking : enabled 16:09:33,869 INFO Version:20 - Hibernate Search 3.1.0.GA 16:09:35,134 DEBUG DocumentBuilderIndexedEntity:157 - Field selection in projections is set to false for entity **com.xyz.abc**. recognized hibernaterecognized hibernaterecognized hibernaterecognized hibernaterecognized hibernaterecognized hibernaterecognized hibernaterecognized hibernaterecognized hibernaterecognized hibernateDocumentBuilderIndexedEntity Donno what the last line indicates ??? (hibernaterecognized....) After the last line it doesnt do anything (no trace too ) and just hangs....

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  • Object allocations in the cellForRowAtIndexPath method is increasing? Is dealloc not called in prese

    - by Madan Mohan
    Hi Guys, This is PresentModelViewController, when click a button i will get this "DoctorListViewController" controller from down. object allocation are not releasing in this controller specially in cellForRowAtIndexPath delegate method. UITableViewCell and two labels allocated in this is not releasing. In the previous view The allocation count of this " UITableViewCell and two labels" is increasing.Also the dealloc method in this view controller is not called when I dismiss the modelviewcontrller, that is way I have released in the close method. please suggest me a right solution Thank you. import "DoctorListViewController.h" @implementation DoctorListViewController @synthesize doctorList; - (id)init { if (self = [super init]) { self.title=@"Doctors List"; UIView *myView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; myView.autoresizingMask=YES; [myView setBackgroundColor:[UIColor groupTableViewBackgroundColor]]; myTableView=nil; myTableView = [[UITableView alloc]initWithFrame:CGRectMake(0,0,320,420) style:UITableViewStylePlain]; myTableView.delegate = self; myTableView.dataSource=self; [myTableView setSectionFooterHeight:5]; [myTableView setSectionHeaderHeight:15]; [myTableView setSeparatorColor:[UIColor greenColor]]; [myView addSubview: myTableView]; UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithTitle:@"Close" style:UIBarButtonItemStyleBordered target:self action:@selector(closeAction)]; self.navigationItem.leftBarButtonItem = addButton; [addButton release]; self.view = myView; [myView release]; } return self; } -(void)viewWillAppear:(BOOL)animated { DoctorsAppDelegate *appDelegate = (DoctorsAppDelegate *) [ [UIApplication sharedApplication] delegate]; [self setToPortrait:appDelegate.isPortrait]; } -(void)setToPortrait:(BOOL)isPortrait { if(isPortrait == YES) { printf("\n hai i am in setToPortrait method"); [self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationPortrait]; } } -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { DoctorsAppDelegate *appDelegate = (DoctorsAppDelegate *) [ [UIApplication sharedApplication] delegate]; if(interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight ) { myTableView.frame=CGRectMake(0,0,480,265); appDelegate.isPortrait=NO; } else if(interfaceOrientation == UIInterfaceOrientationPortrait) { myTableView.frame=CGRectMake(0,0,320,415); appDelegate.isPortrait=YES; } return YES; } -(void)closeAction { printf("\n hai i am in close action*****************"); [doctorList release]; [myTableView release]; myTableView=nil; printf("\n myTableView retainCount :%d",[myTableView retainCount]); [[self navigationController] dismissModalViewControllerAnimated:YES]; } pragma mark methods for dataSource and delegate (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } (NSInteger)tableView:(UITableView )tableView numberOfRowsInSection:(NSInteger)section { / int numberOfRows = [doctorList count]; if(numberOfRows =[doctorList count]){ numberOfRows++; } return numberOfRows; */ return [doctorList count]; } (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 50; } (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = (UITableViewCell *)[myTableView dequeueReusableCellWithIdentifier:@"MyIdentifier"]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"MyIdentifier"]autorelease]; UIView* elementView = [ [UIView alloc] initWithFrame:CGRectMake(5,5,300,480)]; elementView.tag = 0; [cell.contentView addSubview:elementView]; [elementView release]; } UIView* elementView = [cell.contentView viewWithTag:0]; for(UIView* subView in elementView.subviews) { [subView removeFromSuperview]; } if(indexPath.row != [doctorList count]) { cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator; Doctor *obj= [doctorList objectAtIndex:indexPath.row]; UILabel *firstNameLabel =[[[UILabel alloc] initWithFrame:CGRectMake(5,2,300,15)]autorelease]; [firstNameLabel setFont:[UIFont boldSystemFontOfSize:12]]; firstNameLabel.textColor = [UIColor blackColor]; firstNameLabel.textColor =[UIColor blackColor]; firstNameLabel.numberOfLines = 0; firstNameLabel.tag=1; firstNameLabel.backgroundColor = [UIColor clearColor]; NSString *str=obj.firstName; str=[str stringByAppendingString:@" "]; str=[str stringByAppendingString:obj.lastName]; firstNameLabel.text=str; [elementView addSubview:firstNameLabel]; //[firstNameLabel release]; firstNameLabel=nil; UILabel *streetLabel =[[[UILabel alloc] initWithFrame:CGRectMake(5,20,300,15)]autorelease]; [streetLabel setFont:[UIFont systemFontOfSize:12]]; streetLabel.textColor = [UIColor blackColor]; streetLabel.numberOfLines = 0; streetLabel.tag=2; streetLabel.backgroundColor = [UIColor clearColor]; streetLabel.text=obj.streetAddress; [elementView addSubview:streetLabel]; //[streetLabel release]; streetLabel=nil; printf("\n retainCount count of firstNameLabel %d",[firstNameLabel retainCount]); printf("\n retainCount count of streetLabel %d",[streetLabel retainCount]); printf("\n retainCount count of cell %d",[cell retainCount]); } return cell; } (void )tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [myTableView deselectRowAtIndexPath:indexPath animated:YES]; DoctorDetailsViewController *doctorDetailsViewController=[[DoctorDetailsViewController alloc]init]; Doctor *obj= [doctorList objectAtIndex:indexPath.row]; BOOL isList=YES; doctorDetailsViewController.isList=isList; doctorDetailsViewController.doctorObj=obj; [[self navigationController] pushViewController:doctorDetailsViewController animated:YES]; [doctorDetailsViewController release]; } (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } (void)dealloc { printf("\n hai i am in dealloc of Doctor list view contrller"); //[doctorList release]; //[myTableView release]; [super dealloc]; } @end

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  • [SOLVED] Iphone NSXMLParser NSCFString memory leak

    - by atticusalien
    I am building an app that parses an rss feed. In the app there are two different types of feeds with different names for the elements in the feed, so I have created an NSXMLParser NSObject that takes the name of the elements of each feed before parsing. Here is my code: NewsFeedParser.h #import @interface NewsFeedParser : NSObject { NSInteger NewsSelectedCategory; NSXMLParser *NSXMLNewsParser; NSMutableArray *newsCategories; NSMutableDictionary *NewsItem; NSMutableString *NewsCurrentElement, *NewsCurrentElement1, *NewsCurrentElement2, *NewsCurrentElement3; NSString *NewsItemType, *NewsElement1, *NewsElement2, *NewsElement3; NSInteger NewsNumElements; } - (void) parseXMLFileAtURL:(NSString *)URL; @property(nonatomic, retain) NSString *NewsItemType; @property(nonatomic, retain) NSString *NewsElement1; @property(nonatomic, retain) NSString *NewsElement2; @property(nonatomic, retain) NSString *NewsElement3; @property(nonatomic, retain) NSMutableArray *newsCategories; @property(assign, nonatomic) NSInteger NewsNumElements; @end NewsFeedParser.m #import "NewsFeedParser.h" @implementation NewsFeedParser @synthesize NewsItemType; @synthesize NewsElement1; @synthesize NewsElement2; @synthesize NewsElement3; @synthesize newsCategories; @synthesize NewsNumElements; - (void)parserDidStartDocument:(NSXMLParser *)parser{ } - (void)parseXMLFileAtURL:(NSString *)URL { newsCategories = [[NSMutableArray alloc] init]; URL = [URL stringByReplacingOccurrencesOfString:@" " withString:@""]; URL = [URL stringByReplacingOccurrencesOfString:@"\n" withString:@""]; URL = [URL stringByReplacingOccurrencesOfString:@" " withString:@""]; //you must then convert the path to a proper NSURL or it won't work NSURL *xmlURL = [NSURL URLWithString:URL]; // here, for some reason you have to use NSClassFromString when trying to alloc NSXMLParser, otherwise you will get an object not found error // this may be necessary only for the toolchain [[NSURLCache sharedURLCache] setMemoryCapacity:0]; [[NSURLCache sharedURLCache] setDiskCapacity:0]; NSXMLNewsParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; // Set self as the delegate of the parser so that it will receive the parser delegate methods callbacks. [NSXMLNewsParser setDelegate:self]; // Depending on the XML document you're parsing, you may want to enable these features of NSXMLParser. [NSXMLNewsParser setShouldProcessNamespaces:NO]; [NSXMLNewsParser setShouldReportNamespacePrefixes:NO]; [NSXMLNewsParser setShouldResolveExternalEntities:NO]; [NSXMLNewsParser parse]; [NSXMLNewsParser release]; } - (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError { NSString * errorString = [NSString stringWithFormat:@"Unable to download story feed from web site (Error code %i )", [parseError code]]; NSLog(@"error parsing XML: %@", errorString); UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Error loading content" message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [errorAlert show]; [errorAlert release]; [errorString release]; } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{ NewsCurrentElement = [elementName copy]; if ([elementName isEqualToString:NewsItemType]) { // clear out our story item caches... NewsItem = [[NSMutableDictionary alloc] init]; NewsCurrentElement1 = [[NSMutableString alloc] init]; NewsCurrentElement2 = [[NSMutableString alloc] init]; if(NewsNumElements == 3) { NewsCurrentElement3 = [[NSMutableString alloc] init]; } } } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{ if ([elementName isEqualToString:NewsItemType]) { // save values to an item, then store that item into the array... [NewsItem setObject:NewsCurrentElement1 forKey:NewsElement1]; [NewsItem setObject:NewsCurrentElement2 forKey:NewsElement2]; if(NewsNumElements == 3) { [NewsItem setObject:NewsCurrentElement3 forKey:NewsElement3]; } [newsCategories addObject:[[NewsItem copy] autorelease]]; [NewsCurrentElement release]; [NewsCurrentElement1 release]; [NewsCurrentElement2 release]; if(NewsNumElements == 3) { [NewsCurrentElement3 release]; } [NewsItem release]; } } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { //NSLog(@"found characters: %@", string); // save the characters for the current item... if ([NewsCurrentElement isEqualToString:NewsElement1]) { [NewsCurrentElement1 appendString:string]; } else if ([NewsCurrentElement isEqualToString:NewsElement2]) { [NewsCurrentElement2 appendString:string]; } else if (NewsNumElements == 3 && [NewsCurrentElement isEqualToString:NewsElement3]) { [NewsCurrentElement3 appendString:string]; } } - (void)dealloc { [super dealloc]; [newsCategories release]; [NewsItemType release]; [NewsElement1 release]; [NewsElement2 release]; [NewsElement3 release]; } When I create an instance of the class I do like so: NewsFeedParser *categoriesParser = [[NewsFeedParser alloc] init]; if(newsCat == 0) { categoriesParser.NewsItemType = @"article"; categoriesParser.NewsElement1 = @"category"; categoriesParser.NewsElement2 = @"catid"; } else { categoriesParser.NewsItemType = @"article"; categoriesParser.NewsElement1 = @"category"; categoriesParser.NewsElement2 = @"feedUrl"; } [categoriesParser parseXMLFileAtURL:feedUrl]; newsCategories = [[NSMutableArray alloc] initWithArray:categoriesParser.newsCategories copyItems:YES]; [self.tableView reloadData]; [categoriesParser release]; If I run the app with the leaks instrument, the leaks point to the [NSXMLNewsParser parse] call in the NewsFeedParser.m. Here is a screen shot of the Leaks instrument with the NSCFStrings leaking: http://img139.imageshack.us/img139/3997/leaks.png For the life of me I can't figure out where these leaks are coming from. Any help would be greatly appreciated.

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  • Renderpartial or renderaction

    - by femi
    have an action that generates active vacancies. The code is below; public ViewResult OpenVacancies() { var openvacancies = db.GetActiveVacancies(); return View(openvacancies); } I want to use this list on several pages so i guess the best thing to use is html.renderaction (please correct me if i am wrong here). Please note that the view and .ascx control are in an Area. I then created a view by right clicking inside the action and create a .ascx and a strongly typed view of Vacancy. I chose a view content of "List". I then added this line to the required page; <% Html.RenderAction("OpenVacancies"); % Please note that the view and .ascx control are in an Area. The error i got is; The type or namespace name 'Vacancy' could not be found (are you missing a using directive or an assembly reference?) the .ascx code is below; <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" % <table> <tr> <th></th> <th> VacancyID </th> <th> JobTitle </th> <th> PositionID </th> <th> LocationID </th> <th> JobDescription </th> <th> JobConditions </th> <th> Qualifications </th> <th> RequiredSkills </th> <th> Certifications </th> <th> AdvertDate </th> <th> AdvertExpiryDate </th> <th> Status </th> <th> StaffLevel </th> <th> LineManagerEmail </th> <th> ApprovalFlag </th> <th> RequisitionDate </th> </tr> <% foreach (var item in Model) { %> <tr> <td> <%= Html.ActionLink("Edit", "Edit", new { id=item.VacancyID }) %> | <%= Html.ActionLink("Details", "Details", new { id=item.VacancyID })%> | <%= Html.ActionLink("Delete", "Delete", new { id=item.VacancyID })%> </td> <td> <%= Html.Encode(item.VacancyID) %> </td> <td> <%= Html.Encode(item.JobTitle) %> </td> <td> <%= Html.Encode(item.PositionID) %> </td> <td> <%= Html.Encode(item.LocationID) %> </td> <td> <%= Html.Encode(item.JobDescription) %> </td> <td> <%= Html.Encode(item.JobConditions) %> </td> <td> <%= Html.Encode(item.Qualifications) %> </td> <td> <%= Html.Encode(item.RequiredSkills) %> </td> <td> <%= Html.Encode(item.Certifications) %> </td> <td> <%= Html.Encode(String.Format("{0:g}", item.AdvertDate)) %> </td> <td> <%= Html.Encode(String.Format("{0:g}", item.AdvertExpiryDate)) %> </td> <td> <%= Html.Encode(item.Status) %> </td> <td> <%= Html.Encode(item.StaffLevel) %> </td> <td> <%= Html.Encode(item.LineManagerEmail) %> </td> <td> <%= Html.Encode(item.ApprovalFlag) %> </td> <td> <%= Html.Encode(String.Format("{0:g}", item.RequisitionDate)) %> </td> </tr> <% } %> </table> <p> <%= Html.ActionLink("Create New", "Create") %> </p>

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  • ViewPager cycle between views?

    - by Erdem Azakli
    I want my ViewPager implementation to cycle between views instead of stopping at the last view. For example, if I have 3 views to display via a ViewPager, it should return back to the first View after the third View on fling instead of stopping at that third view. I want it to return to the first page/view when the user flings forward on the last page Thanks, Mypageradapter; package com.example.pictures; import android.content.Context; import android.media.AudioManager; import android.os.Parcelable; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.View; public class MyPagerAdapter extends PagerAdapter{ SoundManager snd; int sound1,sound2,sound3; boolean loaded = false; public int getCount() { return 6; } public Object instantiateItem(View collection, int position) { View view=null; LayoutInflater inflater = (LayoutInflater) collection.getContext() .getSystemService(Context.LAYOUT_INFLATER_SERVICE); this.setVolumeControlStream(AudioManager.STREAM_MUSIC); int resId = 0; switch (position) { case 0: resId = R.layout.picture1; view = inflater.inflate(resId, null); break; case 1: resId = R.layout.picture2; view = inflater.inflate(resId, null); break; case 2: resId = R.layout.picture3; view = inflater.inflate(resId, null); break; case 3: resId = R.layout.picture4; view = inflater.inflate(resId, null); break; case 4: resId = R.layout.picture5; view = inflater.inflate(resId, null); break; case 5: resId = R.layout.picture6; view = inflater.inflate(resId, null); break; } ((ViewPager) collection).addView(view, 0); return view; } @SuppressWarnings("unused") private Context getApplicationContext() { // TODO Auto-generated method stub return null; } private void setVolumeControlStream(int streamMusic) { // TODO Auto-generated method stub } @SuppressWarnings("unused") private Context getBaseContext() { // TODO Auto-generated method stub return null; } @SuppressWarnings("unused") private PagerAdapter findViewById(int myfivepanelpager) { // TODO Auto-generated method stub return null; } @Override public void destroyItem(View arg0, int arg1, Object arg2) { ((ViewPager) arg0).removeView((View) arg2); } @Override public boolean isViewFromObject(View arg0, Object arg1) { return arg0 == ((View) arg1); } @Override public Parcelable saveState() { return null; } public static Integer getItem(int position) { // TODO Auto-generated method stub return null; } } OnPageChangeListener; package com.example.pictures; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.view.View; import android.widget.Button; import android.widget.Toast; public class Pictures extends Activity implements OnPageChangeListener{ SoundManager snd; int sound1,sound2,sound3; View view=null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.picturespage); MyPagerAdapter adapter = new MyPagerAdapter(); ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager); myPager.setAdapter(adapter); myPager.setCurrentItem(0); myPager.setOnPageChangeListener(this); snd = new SoundManager(this); sound1 = snd.load(R.raw.sound1); sound2 = snd.load(R.raw.sound2); sound3 = snd.load(R.raw.sound3); } public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } public void onPageSelected(int position) { // TODO Auto-generated method stub switch (position) { case 0: snd.play(sound1); break; case 1: snd.play(sound2); break; case 2: snd.play(sound3); break; case 3: Toast.makeText(this, "1", Toast.LENGTH_SHORT).show(); break; case 4: Toast.makeText(this, "2", Toast.LENGTH_SHORT).show(); break; case 5: Toast.makeText(this, "3", Toast.LENGTH_SHORT).show(); break; } } };

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  • Why can't I fetch an AOL captcha image in my Delphi program?

    - by Bill
    New demo code: I am trying to get the captcha image from a AOL, and i keep getting an error 418. unit imageunit; /// /// h t t p s://new.aol.com/productsweb/ /// interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, IdIOHandler, IdIOHandlerSocket, IdIOHandlerStack, IdSSL, IdSSLOpenSSL, IdIntercept, IdZLibCompressorBase, IdCompressorZLib, IdCookieManager, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient, IdHTTP,jpeg,GIFImg, ExtCtrls, PerlRegEx; type TForm2 = class(TForm) IdHTTP1: TIdHTTP; IdCookieManager1: TIdCookieManager; IdCompressorZLib1: TIdCompressorZLib; IdConnectionIntercept1: TIdConnectionIntercept; IdSSLIOHandlerSocketOpenSSL1: TIdSSLIOHandlerSocketOpenSSL; Panel1: TPanel; Image1: TImage; Panel2: TPanel; Button1: TButton; PerlRegEx1: TPerlRegEx; Memo1: TMemo; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form2: TForm2; implementation {$R *.dfm} function getaimcaptchaimage(data:string):string; var Regex: TPerlRegEx; ResultString: string; begin Regex := TPerlRegEx.Create(nil); Regex.RegEx := '= 1 then begin ResultString := Regex.SubExpressions[1]; end; result:=Resultstring; end; end; procedure TForm2.Button1Click(Sender: TObject); var JPI : TJPEGImage; streamdata:TMemoryStream; SStream: Tstringstream; website:string; begin streamdata := TMemoryStream.Create; SStream := tstringstream.Create ( '' ); try idhttp1.Get('h t t p s://new.aol.com/productsweb/',SStream); memo1.Text:=UTF8ToWideString ( SStream.DataString ); website:='h t t p s://new.aol.com/productsweb/WordVerImage'+getaimcaptchaimage( UTF8ToWideString ( SStream.DataString )); form2.Caption:=website; idhttp1.Get(website, Streamdata); Except { Handle exceptions } On E : Exception Do Begin MessageDlg('Exception: '+E.Message,mtError, [mbOK], 0); End; End; //h t t p s://new.aol.com/productsweb/WordVerImage?20890843 //h t t p s://new.aol.com/productsweb/WordVerImage?91868359 /// /// gives error 418 unused /// streamdata.Position := 0; JPI := TJPEGImage.Create; Try JPI.LoadFromStream ( streamdata ); Finally Image1.Picture.Assign ( JPI ); JPI.Free; streamdata.Free; End; end; end. Form: object Form2: TForm2 Left = 0 Top = 0 Caption = 'Form2' ClientHeight = 247 ClientWidth = 480 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object Panel1: TPanel Left = 0 Top = 41 Width = 480 Height = 206 Align = alClient TabOrder = 0 object Image1: TImage Left = 1 Top = 1 Width = 478 Height = 115 Align = alClient ExplicitLeft = 5 ExplicitTop = 17 ExplicitWidth = 200 ExplicitHeight = 70 end object Memo1: TMemo Left = 1 Top = 116 Width = 478 Height = 89 Align = alBottom TabOrder = 0 ExplicitLeft = 80 ExplicitTop = 152 ExplicitWidth = 185 end end object Panel2: TPanel Left = 0 Top = 0 Width = 480 Height = 41 Align = alTop TabOrder = 1 object Button1: TButton Left = 239 Top = 6 Width = 75 Height = 25 Caption = 'Button1' TabOrder = 0 OnClick = Button1Click end end object IdHTTP1: TIdHTTP Intercept = IdConnectionIntercept1 IOHandler = IdSSLIOHandlerSocketOpenSSL1 MaxAuthRetries = 100 AllowCookies = True HandleRedirects = True RedirectMaximum = 100 ProxyParams.BasicAuthentication = False ProxyParams.ProxyPort = 0 Request.ContentLength = -1 Request.Accept = 'image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-s' + 'hockwave-flash, application/cade, application/xaml+xml, applicat' + 'ion/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-' + 'application, */*' Request.BasicAuthentication = False Request.Referer = 'http://www.yahoo.com' Request.UserAgent = 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.1) Gecko/201001' + '22 firefox/3.6.1' HTTPOptions = [hoForceEncodeParams] CookieManager = IdCookieManager1 Compressor = IdCompressorZLib1 Left = 40 Top = 160 end object IdCookieManager1: TIdCookieManager Left = 360 Top = 136 end object IdCompressorZLib1: TIdCompressorZLib Left = 408 Top = 56 end object IdConnectionIntercept1: TIdConnectionIntercept Left = 304 Top = 72 end object IdSSLIOHandlerSocketOpenSSL1: TIdSSLIOHandlerSocketOpenSSL Intercept = IdConnectionIntercept1 MaxLineAction = maException Port = 0 DefaultPort = 0 SSLOptions.Mode = sslmUnassigned SSLOptions.VerifyMode = [] SSLOptions.VerifyDepth = 0 Left = 192 Top = 136 end object PerlRegEx1: TPerlRegEx Options = [] Left = 120 Top = 56 end end If you go to h t t p s://new.aol.com/productsweb/ you will notice the captcha image has a url like h t t p s://new.aol.com/productsweb/WordVerImage?91868359 I put that url in the edit box and get an error. What is wrong with this code? *take the extra spaces out of the URLs

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  • Design pattern for parsing data that will be grouped to two different ways and flipped

    - by lewisblackfan
    I'm looking for an easily maintainable and extendable design model for a script to parse an excel workbook into two separate workbooks after pulling data from other locations like the command line, and a database. The high level details are as follows. I need to parse an excel workbook containing a sheet that lists unique question names, the only reliable information that can be parsed from the question name is the book code that identifies the title and edition of the textbook the question is associated with, the rest of the question name is not standardized well enough to be reliably parsed by computer. The general form of the question name is best described by the following regular expression. '^(\w+)\s(\w{1,2})\.(\w{1,2})\.(\w{1,3})\.(\w{1,3}\.)*$' The first sub-pattern is the book code, the second sub-pattern is 90% of the time the chapter, and the rest of the sub-patterns could be section, problem type, problem number, or question type information. There is no simple logic, at least not one I can find. There will be a minimum of three other columns in this spreadsheet; one column will be the chapter the question is associated with, the second will be the section within the chapter the question is associated with, and the third will be some kind of asset indicated by a uniform resource locator. 1 | 1 | qname1 | url | description | url | description ... 1 | 1 | qname2 | url | description 1 | 1 | qname3 | url | description | url | description | url | The asset can be indicated by a full or partial uniform resource locator, the partial url will need to be completed before it can be fed into the application. There theoretically could be no limit to the number of asset columns, the assets will be grouped in columns by type. Some times additional data will have to be retrieved from a database or combined with the book code before the asset url is complete and can be understood by the application that will be using the asset. The type is an abstraction, there are eight types right now, each with their own logic in how the uniform resource locator is handled and or completed, and I have to add a new type and its logic every three or four months. For each asset url there is the possibility of a description column, a character string for display in the application, but not always. (I've already worked out validating the description text, and squashing MSs obscure code page down to something 7-bit ascii can handle.) Now that all the details are filled-in I can get to the actual problem of parsing the file. I need to split the information in this excel workbook into two separate workbooks. The first workbook will group all the questions by section in rows. With the first cell being the section doublet and the rest of the cells in the row are the question names. 1.1 | qname1 | qname2 | qname3 | qname4 | 1.2 | qname1 | qname2 | qname3 | 1.3 | qname1 | qname2 | qname3 | qname4 | qname5 There is no set number of questions for each section as you can see from the above example. The second workbook is more complicated, there is one row per asset, and question names that have more than one asset will be duplicated. There will be four or five columns on this sheet. The first is the question name for the asset, the second is a media type used to select the correct icon for the asset in the application, the third is string representing the asset type, the four is the full and complete uniform resource locator for the asset, and the fifth columns is the optional text description for the asset. q1 | mtype1 | atype1 | url | description q1 | mtype2 | atype2 | url | description q1 | mtype2 | atype3 | url | description q2 | mtype1 | atype1 | url | description q2 | mtype2 | atype3 | url | description For the original six types I did have a script that parsed the source excel workbook into the other two excel workbooks, and I was able to add two more types until I ran aground on the implementation of the ninth type and tenth types. What broke my script was the fact that the ninth type is actually a sub-type of one of the original six, but with entirely different logic, and my mostly procedural script could not accommodate without duplicating a lot of code. I also had a lot of bugs in the script and will be writing the test first on this time around. I'm stuck with the format for the resulting two workbooks, this script is glue code, development went ahead with the project without bothering to get a complete spec from the sponsor. I work for the same company as the developers but in the editorial department, editorial is co-sponsor of the project, and am expected to fix pesky details like this (I'm foaming at the mouth as I type this). I've tried factories, I've tried different object models, but each resulting workbook is so different when I find a design that works for generating one workbook the code is not really usable for generating the other. What I would really like are ideas about a maintainable and extensible design for parsing the source workbook into both workbooks with maximum code reuse, and or sympathy.

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  • I never really understood: what is CGI?

    - by claws
    CGI is a Comman Gateway Interface. As the name says, it is a "common" gateway interface for everything. It is so trivial and naive from the name. I feel that I understood this and I felt this every time I encountered this word. But frankly, I didn't. I'm still confused. I am a PHP programmer. I did lot of web development. user (client) request for page --- webserver(-embedded PHP interpreter) ---- Server side(PHP) Script --- MySQL Server. Now say my PHP Script can fetch results from MySQL Server && MATLAB Server && Some other server. So, now PHP Script is the CGI? because its interface for the between webserver & All other servers? I don't know. Sometimes they call CGI, a technology & othertimes they call CGI a program or someother server. What exactly is CGI? Whats the big deal with /cgi-bin/*.cgi? Whats up with this? I don't know what is this cgi-bin directory on the server for. I don't know why they have *.cgi extensions. Why does Perl always comes in the way. CGI & Perl (language). I also don't know whats up with these two. Almost all the time I keep hearing these two in combination "CGI & Perl". This book is another great example CGI Programming with Perl Why not "CGI Programming with PHP/JSP/ASP". I never saw such things. CGI Programming in C this confuses me a lot. in C?? Seriously?? I don't know what to say. I"m just confused. "in C"?? This changes everything. Program needs to be compiled and executed. This entirely changes my view of web programming. When do I compile? How does the program gets executed (because it will be a machine code, so it must execute as a independent process). How does it communicate with the web server? IPC? and interfacing with all the servers (in my example MATLAB & MySQL) using socket programming? I'm lost!! They say that CGI is depreciated. Its no more in use. Is it so? What is its latest update? Once, I ran into a situation where I had to give HTTP PUT request access to web server (Apache HTTPD). Its a long back. So, as far as I remember this is what I did: Edited the configuration file of Apache HTTPD to tell webserver to pass all HTTP PUT requests to some put.php ( I had to write this PHP script) Implement put.php to handle the request (save the file to the location mentioned) People said that I wrote a CGI Script. Seriously, I didn't have clue what they were talking about. Did I really write CGI Script? I hope you understood what my confusion is. (Because I myself don't know where I'm confused). I request you guys to keep your answer as simple as possible. I really can't understand any fancy technical terminology. At least not in this case. EDIT: I found this amazing tutorial "CGI Programming Is Simple!" - CGI Tutorial Which explains the concepts in simplest possible way. I've only have one complaint about this tutorial. Just to make what ever he explained complete he should have shown the C code he used for generating response for those GET / POST requests. I've also added link to this tutorial to Wikipedia's article : http://en.wikipedia.org/wiki/Common_Gateway_Interface

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  • Java implementing Exception Handling

    - by user69514
    I am trying to implement an OutOfStockException for when the user attempts to buy more items than there are available. I'm not sure if my implementation is correct. Does this look OK to you? public class OutOfStockException extends Exception { public OutOfStockException(){ super(); } public OutOfStockException(String s){ super(s); } } This is the class where I need to test it: import javax.swing.JOptionPane; public class SwimItems { static final int MAX = 100; public static void main (String [] args) { Item [] items = new Item[MAX]; int numItems; numItems = fillFreebies(items); numItems += fillTaxable(items,numItems); numItems += fillNonTaxable(items,numItems); sellStuff(items, numItems); } private static int num(String which) { int n = 0; do { try{ n=Integer.parseInt(JOptionPane.showInputDialog("Enter number of "+which+" items to add to stock:")); } catch(NumberFormatException nfe){ System.out.println("Number Format Exception in num method"); } } while (n < 1 || n > MAX/3); return n; } private static int fillFreebies(Item [] list) { int n = num("FREEBIES"); for (int i = 0; i < n; i++) try{ list [i] = new Item(JOptionPane.showInputDialog("What freebie item will you give away?"), Integer.parseInt(JOptionPane.showInputDialog("How many do you have?"))); } catch(NumberFormatException nfe){ System.out.println("Number Format Exception in fillFreebies method"); } catch(ArrayIndexOutOfBoundsException e){ System.out.println("Array Index Out Of Bounds Exception in fillFreebies method"); } return n; } private static int fillTaxable(Item [] list, int number) { int n = num("Taxable Items"); for (int i = number ; i < n + number; i++) try{ list [i] = new TaxableItem(JOptionPane.showInputDialog("What taxable item will you sell?"), Double.parseDouble(JOptionPane.showInputDialog("How much will you charge (not including tax) for each?")), Integer.parseInt(JOptionPane.showInputDialog("How many do you have?"))); } catch(NumberFormatException nfe){ System.out.println("Number Format Exception in fillTaxable method"); } catch(ArrayIndexOutOfBoundsException e){ System.out.println("Array Index Out Of Bounds Exception in fillTaxable method"); } return n; } private static int fillNonTaxable(Item [] list, int number) { int n = num("Non-Taxable Items"); for (int i = number ; i < n + number; i++) try{ list [i] = new SaleItem(JOptionPane.showInputDialog("What non-taxable item will you sell?"), Double.parseDouble(JOptionPane.showInputDialog("How much will you charge for each?")), Integer.parseInt(JOptionPane.showInputDialog("How many do you have?"))); } catch(NumberFormatException nfe){ System.out.println("Number Format Exception in fillNonTaxable method"); } catch(ArrayIndexOutOfBoundsException e){ System.out.println("Array Index Out Of Bounds Exception in fillNonTaxable method"); } return n; } private static String listEm(Item [] all, int n, boolean numInc) { String list = "Items: "; for (int i = 0; i < n; i++) { try{ list += "\n"+ (i+1)+". "+all[i].toString() ; if (all[i] instanceof SaleItem) list += " (taxable) "; if (numInc) list += " (Number in Stock: "+all[i].getNum()+")"; } catch(ArrayIndexOutOfBoundsException e){ System.out.println("Array Index Out Of Bounds Exception in listEm method"); } catch(NullPointerException npe){ System.out.println("Null Pointer Exception in listEm method"); } } return list; } private static void sellStuff (Item [] list, int n) { int choice; do { try{ choice = Integer.parseInt(JOptionPane.showInputDialog("Enter item of choice: "+listEm(list, n, false))); } catch(NumberFormatException nfe){ System.out.println("Number Format Exception in sellStuff method"); } }while (JOptionPane.showConfirmDialog(null, "Another customer?")==JOptionPane.YES_OPTION); JOptionPane.showMessageDialog(null, "Remaining "+listEm(list, n, true)); } }

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  • Techniques for modeling a dynamic dataflow with Java concurrency API

    - by Maian
    Is there an elegant way to model a dynamic dataflow in Java? By dataflow, I mean there are various types of tasks, and these tasks can be "connected" arbitrarily, such that when a task finishes, successor tasks are executed in parallel using the finished tasks output as input, or when multiple tasks finish, their output is aggregated in a successor task (see flow-based programming). By dynamic, I mean that the type and number of successors tasks when a task finishes depends on the output of that finished task, so for example, task A may spawn task B if it has a certain output, but may spawn task C if has a different output. Another way of putting it is that each task (or set of tasks) is responsible for determining what the next tasks are. Sample dataflow for rendering a webpage: I have as task types: file downloader, HTML/CSS renderer, HTML parser/DOM builder, image renderer, JavaScript parser, JavaScript interpreter. File downloader task for HTML file HTML parser/DOM builder task File downloader task for each embedded file/link If image, image renderer If external JavaScript, JavaScript parser JavaScript interpreter Otherwise, just store in some var/field in HTML parser task JavaScript parser for each embedded script JavaScript interpreter Wait for above tasks to finish, then HTML/CSS renderer (obviously not optimal or perfectly correct, but this is simple) I'm not saying the solution needs to be some comprehensive framework (in fact, the closer to the JDK API, the better), and I absolutely don't want something as heavyweight is say Spring Web Flow or some declarative markup or other DSL. To be more specific, I'm trying to think of a good way to model this in Java with Callables, Executors, ExecutorCompletionServices, and perhaps various synchronizer classes (like Semaphore or CountDownLatch). There are a couple use cases and requirements: Don't make any assumptions on what executor(s) the tasks will run on. In fact, to simplify, just assume there's only one executor. It can be a fixed thread pool executor, so a naive implementation can result in deadlocks (e.g. imagine a task that submits another task and then blocks until that subtask is finished, and now imagine several of these tasks using up all the threads). To simplify, assume that the data is not streamed between tasks (task output-succeeding task input) - the finishing task and succeeding task won't exist together, so the input data to the succeeding task will not be changed by the preceeding task (since it's already done). There are only a couple operations that the dataflow "engine" should be able to handle: A mechanism where a task can queue more tasks A mechanism whereby a successor task is not queued until all the required input tasks are finished A mechanism whereby the main thread (or other threads not managed by the executor) blocks until the flow is finished A mechanism whereby the main thread (or other threads not managed by the executor) blocks until certain tasks have finished Since the dataflow is dynamic (depends on input/state of the task), the activation of these mechanisms should occur within the task code, e.g. the code in a Callable is itself responsible for queueing more Callables. The dataflow "internals" should not be exposed to the tasks (Callables) themselves - only the operations listed above should be available to the task. Note that the type of the data is not necessarily the same for all tasks, e.g. a file download task may accept a File as input but will output a String. If a task throws an uncaught exception (indicating some fatal error requiring all dataflow processing to stop), it must propagate up to the thread that initiated the dataflow as quickly as possible and cancel all tasks (or something fancier like a fatal error handler). Tasks should be launched as soon as possible. This along with the previous requirement should preclude simple Future polling + Thread.sleep(). As a bonus, I would like to dataflow engine itself to perform some action (like logging) every time task is finished or when no has finished in X time since last task has finished. Something like: ExecutorCompletionService<T> ecs; while (hasTasks()) { Future<T> future = ecs.poll(1 minute); some_action_like_logging(); if (future != null) { future.get() ... } ... } Are there straightforward ways to do all this with Java concurrency API? Or if it's going to complex no matter what with what's available in the JDK, is there a lightweight library that satisfies the requirements? I already have a partial solution that fits my particular use case (it cheats in a way, since I'm using two executors, and just so you know, it's not related at all to the web browser example I gave above), but I'd like to see a more general purpose and elegant solution.

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  • Convert C++Builder AnsiString to std::string via boost::lexical_cast

    - by David Klein
    For a school assignment I have to implement a project in C++ using Borland C++ Builder. As the VCL uses AnsiString for all GUI Components I have to convert all of my std::strings to AnsiString for the sake of displaying. std::string inp = "Hello world!"; AnsiString outp(inp.c_str()); works of course but is a bit tedious to write and code duplication I want to avoid. As we use Boost in other contexts I decided to provide some helper functions go get boost::lexical_cast to work with AnsiString. Here is my implementation so far: std::istream& operator>>(std::istream& istr, AnsiString& str) { istr.exceptions(std::ios::badbit | std::ios::failbit | std::ios::eofbit); std::string s; std::getline(istr,s); str = AnsiString(s.c_str()); return istr; } In the beginning I got Access Violation after Access Violation but since I added the .exceptions() stuff the picture gets clearer. When the conversion is performed I get the following Exception: ios_base::eofbit set [Runtime Error/std::ios_base::failure] Does anyone have an idea how to fix it and can explain why the error occurs? My C++ experience is very limited. The conversion routine the other way round would be: std::ostream& operator<<(std::ostream& ostr,const AnsiString& str) { ostr << (str.c_str()); return ostr; } Maybe someone will spot an error here too :) With best regards! Edit: At the moment I'm using the edited version of Jem, it works in the beginning. After a while of using the programm the Borland Codeguard mentions some pointer arithmetic in already freed regions. Any ideas how this could be related? The Codeguard log (I'm using the german version, translations marked with stars): ------------------------------------------ Fehler 00080. 0x104230 (r) (Thread 0x07A4): Zeigerarithmetik in freigegebenem Speicher: 0x0241A238-0x0241A258. **(pointer arithmetic in freed region)** | d:\program files\borland\bds\4.0\include\dinkumware\sstream Zeile 126: | { // not first growth, adjust pointers | _Seekhigh = _Seekhigh - _Mysb::eback() + _Ptr; |> _Mysb::setp(_Mysb::pbase() - _Mysb::eback() + _Ptr, | _Mysb::pptr() - _Mysb::eback() + _Ptr, _Ptr + _Newsize); | if (_Mystate & _Noread) Aufrufhierarchie: **(stack-trace)** 0x00411731(=FOSChampion.exe:0x01:010731) d:\program files\borland\bds\4.0\include\dinkumware\sstream#126 0x00411183(=FOSChampion.exe:0x01:010183) d:\program files\borland\bds\4.0\include\dinkumware\streambuf#465 0x0040933D(=FOSChampion.exe:0x01:00833D) d:\program files\borland\bds\4.0\include\dinkumware\streambuf#151 0x00405988(=FOSChampion.exe:0x01:004988) d:\program files\borland\bds\4.0\include\dinkumware\ostream#679 0x00405759(=FOSChampion.exe:0x01:004759) D:\Projekte\Schule\foschamp\src\Server\Ansistringkonverter.h#31 0x004080C9(=FOSChampion.exe:0x01:0070C9) D:\Projekte\Schule\foschamp\lib\boost_1_34_1\boost/lexical_cast.hpp#151 Objekt (0x0241A238) [Größe: 32 Byte] war erstellt mit new **(Object was created with new)** | d:\program files\borland\bds\4.0\include\dinkumware\xmemory Zeile 28: | _Ty _FARQ *_Allocate(_SIZT _Count, _Ty _FARQ *) | { // allocate storage for _Count elements of type _Ty |> return ((_Ty _FARQ *)::operator new(_Count * sizeof (_Ty))); | } | Aufrufhierarchie: **(stack-trace)** 0x0040ED90(=FOSChampion.exe:0x01:00DD90) d:\program files\borland\bds\4.0\include\dinkumware\xmemory#28 0x0040E194(=FOSChampion.exe:0x01:00D194) d:\program files\borland\bds\4.0\include\dinkumware\xmemory#143 0x004115CF(=FOSChampion.exe:0x01:0105CF) d:\program files\borland\bds\4.0\include\dinkumware\sstream#105 0x00411183(=FOSChampion.exe:0x01:010183) d:\program files\borland\bds\4.0\include\dinkumware\streambuf#465 0x0040933D(=FOSChampion.exe:0x01:00833D) d:\program files\borland\bds\4.0\include\dinkumware\streambuf#151 0x00405988(=FOSChampion.exe:0x01:004988) d:\program files\borland\bds\4.0\include\dinkumware\ostream#679 Objekt (0x0241A238) war Gelöscht mit delete **(Object was deleted with delete)** | d:\program files\borland\bds\4.0\include\dinkumware\xmemory Zeile 138: | void deallocate(pointer _Ptr, size_type) | { // deallocate object at _Ptr, ignore size |> ::operator delete(_Ptr); | } | Aufrufhierarchie: **(stack-trace)** 0x004044C6(=FOSChampion.exe:0x01:0034C6) d:\program files\borland\bds\4.0\include\dinkumware\xmemory#138 0x00411628(=FOSChampion.exe:0x01:010628) d:\program files\borland\bds\4.0\include\dinkumware\sstream#111 0x00411183(=FOSChampion.exe:0x01:010183) d:\program files\borland\bds\4.0\include\dinkumware\streambuf#465 0x0040933D(=FOSChampion.exe:0x01:00833D) d:\program files\borland\bds\4.0\include\dinkumware\streambuf#151 0x00405988(=FOSChampion.exe:0x01:004988) d:\program files\borland\bds\4.0\include\dinkumware\ostream#679 0x00405759(=FOSChampion.exe:0x01:004759) D:\Projekte\Schule\foschamp\src\Server\Ansistringkonverter.h#31 ------------------------------------------ Ansistringkonverter.h is the file with the posted operators and line 31 is: std::ostream& operator<<(std::ostream& ostr,const AnsiString& str) { ostr << (str.c_str()); **(31)** return ostr; } Thanks for your help :)

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  • Is this crash in libdispatch caused by Reachability?

    - by esilver
    Can anyone tell me if this crashing stack appears to be caused by Reachability? I am running apple's latest implementation of Reachability, downloadable at https://developer.apple.com/library/ios/samplecode/reachability/Introduction/Intro.html I have an app where ARC is not enabled by default (it is a legacy app) but I enable it on a per-file basis. I have enabled -fobjc-arc for Reachability.m When I look at these threads, my code is nowhere to be found. I see some activity happening because of a WebHTMLView (probably the ad network view code currently on screen; it's not mine). On Thread 10, I see a SCNetworkReachabilityDeallocate, then a dispatch_semaphore_wait_slow, and the crash happens on Thread 14 in libdispatch. Do you think this crash is being caused by that Reachability code, and have I erred in using -fobjc-arc with Reachability.m? Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x2000000c Triggered by Thread: 14 Thread 0: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0cc2 __CFRunLoopRun + 858 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 GraphicsServices 0x340822e6 GSEventRunModal + 134 7 UIKit 0x31c021e0 UIApplicationMain + 1132 8 MyApp 0x00053ad4 main (main.m:33) 9 libdyld.dylib 0x39c0bab4 start + 0 Thread 1: 0 libsystem_kernel.dylib 0x39caf838 kevent64 + 24 1 libdispatch.dylib 0x39bfe0d0 _dispatch_mgr_invoke + 228 2 libdispatch.dylib 0x39bf863e _dispatch_mgr_thread + 34 Thread 2 name: com.apple.NSURLConnectionLoader Thread 2: 0 libsystem_kernel.dylib 0x39cb0910 close + 8 1 CoreFoundation 0x2f370ef6 CFSocketInvalidate + 434 2 CFNetwork 0x2f0122a2 Schedulables::_SchedulablesInvalidateApplierFunction(void const*, void*) + 14 3 CoreFoundation 0x2f34af6e CFArrayApplyFunction + 34 4 CFNetwork 0x2f011a94 SocketStream::close(void const*) + 280 5 CFNetwork 0x2f01194e CoreStreamBase::_streamInterface_Close() + 46 6 CFNetwork 0x2f030286 HTTPReadFilter::_streamImpl_Close() + 66 7 CFNetwork 0x2f01194e CoreStreamBase::_streamInterface_Close() + 46 8 CFNetwork 0x2f0301c6 NetConnection::shutdownConnectionStreams() + 98 9 CFNetwork 0x2f0309c8 NetConnection::closeStreamsIfPossibleOrSignalThatThatNeedsToBeDonePrettyPlease() + 56 10 CFNetwork 0x2f030d12 HTTPConnectionCacheEntry::removeUnauthConnection(NetConnection*) + 182 11 CoreFoundation 0x2f34af6e CFArrayApplyFunction + 34 12 CFNetwork 0x2f075678 HTTPConnectionCacheEntry::purgeIdleConnections(double, double) + 256 13 CFNetwork 0x2f030ad4 HTTPConnectionCache::performIdleSweep() + 156 14 CFNetwork 0x2f073b42 HTTPConnectionCache::timeoutIdleCellConnections() + 18 15 CFNetwork 0x2f0b3394 ___ZNK17CoreSchedulingSet13_performAsyncEPKcU13block_pointerFvvE_block_invoke + 16 16 CoreFoundation 0x2f34af6e CFArrayApplyFunction + 34 17 CFNetwork 0x2f019f10 RunloopBlockContext::perform() + 160 18 CFNetwork 0x2f019de2 MultiplexerSource::perform() + 218 19 CFNetwork 0x2f019c70 MultiplexerSource::_perform(void*) + 44 20 CoreFoundation 0x2f3e2f24 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 12 21 CoreFoundation 0x2f3e23ea __CFRunLoopDoSources0 + 202 22 CoreFoundation 0x2f3e0bda __CFRunLoopRun + 626 23 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 24 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 25 Foundation 0x2fd8664c +[NSURLConnection(Loader) _resourceLoadLoop:] + 316 26 Foundation 0x2fdfbdc2 __NSThread__main__ + 1058 27 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 28 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 29 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 3 name: WebThread Thread 3: 0 CoreGraphics 0x2f49163c CGRectIsEmpty + 0 1 WebCore 0x37291700 -[WAKView setNeedsDisplayInRect:] + 76 2 WebKit 0x37cad22a -[WebHTMLView setNeedsDisplayInRect:] + 214 3 WebCore 0x372915cc WebCore::ScrollView::platformRepaintContentRectangle(WebCore::IntRect const&, bool) + 148 4 WebCore 0x37291412 WebCore::ScrollView::repaintContentRectangle(WebCore::IntRect const&, bool) + 98 5 WebCore 0x37291272 WebCore::FrameView::doDeferredRepaints() + 90 6 WebCore 0x372dc96c WebCore::FrameView::layout(bool) + 1748 7 WebCore 0x3721fb94 WebCore::ThreadTimers::sharedTimerFiredInternal() + 132 8 WebCore 0x3721fae6 WebCore::timerFired(__CFRunLoopTimer*, void*) + 22 9 CoreFoundation 0x2f3e2e84 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 12 10 CoreFoundation 0x2f3e2a9e __CFRunLoopDoTimer + 790 11 CoreFoundation 0x2f3e0e26 __CFRunLoopRun + 1214 12 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 13 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 14 WebCore 0x372ae7d8 RunWebThread(void*) + 416 15 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 16 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 17 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 4: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 libAVFAudio.dylib 0x2e3295ae GenericRunLoopThread::Entry(void*) + 126 7 libAVFAudio.dylib 0x2e31dbf4 CAPThread::Entry(CAPThread*) + 176 8 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 9 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 10 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 5 name: JavaScriptCore::BlockFree Thread 5: 0 libsystem_kernel.dylib 0x39cc1f38 __psynch_cvwait + 24 1 libsystem_pthread.dylib 0x39d28262 _pthread_cond_wait + 538 2 libsystem_pthread.dylib 0x39d2903c pthread_cond_wait + 36 3 JavaScriptCore 0x3036f408 JSC::BlockAllocator::blockFreeingThreadMain() + 204 4 JavaScriptCore 0x3036ca70 WTF::wtfThreadEntryPoint(void*) + 12 5 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 6 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 7 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 6 name: JavaScriptCore::Marking Thread 6: 0 libsystem_kernel.dylib 0x39cc1f38 __psynch_cvwait + 24 1 libsystem_pthread.dylib 0x39d28262 _pthread_cond_wait + 538 2 libsystem_pthread.dylib 0x39d2903c pthread_cond_wait + 36 3 JavaScriptCore 0x3050daf2 JSC::GCThread::waitForNextPhase() + 74 4 JavaScriptCore 0x3050db4c JSC::GCThread::gcThreadMain() + 48 5 JavaScriptCore 0x3036ca70 WTF::wtfThreadEntryPoint(void*) + 12 6 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 7 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 8 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 7 name: com.apple.CFSocket.private Thread 7: 0 libsystem_kernel.dylib 0x39cc2440 select$DARWIN_EXTSN + 20 1 CoreFoundation 0x2f3e645e __CFSocketManager + 482 2 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 3 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 4 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 8 name: AFNetworking Thread 8: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 Foundation 0x2fd39822 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250 7 Foundation 0x2fd8a664 -[NSRunLoop(NSRunLoop) run] + 76 8 MyApp 0x002c33d0 +[AFURLConnectionOperation networkRequestThreadEntryPoint:] (AFURLConnectionOperation.m:184) 9 Foundation 0x2fdfbdc2 __NSThread__main__ + 1058 10 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 11 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 12 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 9 name: WebCore: CFNetwork Loader Thread 9: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f34b31e CFRunLoopRunInMode + 102 6 WebCore 0x372f7872 WebCore::runLoaderThread(void*) + 250 7 JavaScriptCore 0x3036ca70 WTF::wtfThreadEntryPoint(void*) + 12 8 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 9 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 10 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 10: 0 libsystem_kernel.dylib 0x39cafad4 semaphore_wait_trap + 8 1 libdispatch.dylib 0x39bfcdec _dispatch_semaphore_wait_slow + 172 2 libxpc.dylib 0x39d370d6 xpc_connection_send_message_with_reply_sync + 150 3 SystemConfiguration 0x31b77362 _reach_server_target_remove + 90 4 SystemConfiguration 0x31b772d2 __SCNetworkReachabilityServer_targetRemove + 38 5 SystemConfiguration 0x31b5e318 __SCNetworkReachabilityDeallocate + 92 6 CoreFoundation 0x2f347efc CFRelease + 464 7 libdispatch.dylib 0x39bfc7e0 _dispatch_root_queue_drain + 220 8 libdispatch.dylib 0x39bfc9cc _dispatch_worker_thread2 + 52 9 libsystem_pthread.dylib 0x39d26dfc _pthread_wqthread + 296 10 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4 Thread 11: 0 libsystem_kernel.dylib 0x39cc2c7c __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x39d26e06 _pthread_wqthread + 306 2 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4 Thread 12: 0 libsystem_kernel.dylib 0x39cc2c7c __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x39d26e06 _pthread_wqthread + 306 2 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4 Thread 13: 0 libsystem_kernel.dylib 0x39cafa84 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x39caf87c mach_msg + 36 2 CoreFoundation 0x2f3e255c __CFRunLoopServiceMachPort + 152 3 CoreFoundation 0x2f3e0c7c __CFRunLoopRun + 788 4 CoreFoundation 0x2f34b53c CFRunLoopRunSpecific + 520 5 CoreFoundation 0x2f38f1a6 CFRunLoopRun + 94 6 CoreMotion 0x2fa03394 ___lldb_unnamed_function1407$$CoreMotion + 724 7 libsystem_pthread.dylib 0x39d28c5a _pthread_body + 138 8 libsystem_pthread.dylib 0x39d28bca _pthread_start + 98 9 libsystem_pthread.dylib 0x39d26ccc thread_start + 4 Thread 14 Crashed: 0 libobjc.A.dylib 0x3970db66 objc_msgSend + 6 1 CoreFoundation 0x2f347f58 CFRelease + 556 2 libdispatch.dylib 0x39bf7100 _dispatch_call_block_and_release + 8 3 libdispatch.dylib 0x39bfbe72 _dispatch_queue_drain + 370 4 libdispatch.dylib 0x39bf8f96 _dispatch_queue_invoke + 38 5 libdispatch.dylib 0x39bfc74e _dispatch_root_queue_drain + 74 6 libdispatch.dylib 0x39bfc9cc _dispatch_worker_thread2 + 52 7 libsystem_pthread.dylib 0x39d26dfc _pthread_wqthread + 296 8 libsystem_pthread.dylib 0x39d26cc0 start_wqthread + 4

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  • Asp.Net Login control (Visual Web Dev)

    - by craig
    This is the code when you take the Login control from the toolbox. <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:Login ID="Login1" runat="server" onauthenticate="Login1_Authenticate" BackColor="#F7F7DE" BorderColor="#CCCC99" BorderStyle="Solid" BorderWidth="1px" Font-Names="Verdana" Font-Size="10pt"> <LayoutTemplate> <table border="0" cellpadding="1" cellspacing="0" style="border-collapse:collapse;"> <tr> <td> <table border="0" cellpadding="0"> <tr> <td align="center" colspan="2"> Log In</td> </tr> <tr> <td align="right"> <asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName">User Name:</asp:Label> </td> <td> <asp:TextBox ID="UserName" runat="server" ></asp:TextBox> <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName" ErrorMessage="User Name is required." ToolTip="User Name is required." ValidationGroup="Login1">*</asp:RequiredFieldValidator> </td> </tr> <tr> <td align="right"> <asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">Password:</asp:Label> </td> <td> <asp:TextBox ID="Password" runat="server" TextMode="Password"></asp:TextBox> <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password" ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="Login1">*</asp:RequiredFieldValidator> </td> </tr> <tr> <td colspan="2"> <asp:CheckBox ID="RememberMe" runat="server" Text="Remember me next time." /> </td> </tr> <tr> <td align="center" colspan="2" style="color:Red;"> <asp:Literal ID="FailureText" runat="server" EnableViewState="False"></asp:Literal> </td> </tr> <tr> <td align="right" colspan="2"> <asp:Button ID="LoginButton" runat="server" CommandName="Login" Text="Log In" ValidationGroup="Login1" onclick="LoginButton_Click" /> </td> </tr> </table> </td> </tr> </table> </LayoutTemplate> <TitleTextStyle BackColor="#6B696B" Font-Bold="True" ForeColor="#FFFFFF" /> </asp:Login> </div> </form> </body> </html> Part of my aspx.cs protected void LoginButton_Click(object sender, EventArgs e) { String sUserName = UserName.Text; String sPassword = Password.Text; Error 1 The name 'UserName' does not exist in the current context Error 2 The name 'Password' does not exist in the current context Error 3 'ASP.default_aspx' does not contain a definition for 'Login1_Authenticate' and no extension method 'Login1_Authenticate' accepting a first argument of type 'ASP.default_aspx' could be found (are you missing a using directive or an assembly reference?) What am I doing wrong?

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  • ASM programming, how to use loop?

    - by chris
    Hello. Im first time here.I am a college student. I've created a simple program by using assembly language. And im wondering if i can use loop method to run it almost samething as what it does below the program i posted. and im also eager to find someome who i can talk through MSN messanger so i can ask you questions right away.(if possible) ok thank you .MODEL small .STACK 400h .data prompt db 10,13,'Please enter a 3 digit number, example 100:',10,13,'$' ;10,13 cause to go to next line first_digit db 0d second_digit db 0d third_digit db 0d Not_prime db 10,13,'This number is not prime!',10,13,'$' prime db 10,13,'This number is prime!',10,13,'$' question db 10,13,'Do you want to contine Y/N $' counter dw 0d number dw 0d half dw ? .code Start: mov ax, @data ;establish access to the data segment mov ds, ax mov number, 0d LetsRoll: mov dx, offset prompt ; print the string (please enter a 3 digit...) mov ah, 9h int 21h ;execute ;read FIRST DIGIT mov ah, 1d ;bios code for read a keystroke int 21h ;call bios, it is understood that the ascii code will be returned in al mov first_digit, al ;may as well save a copy sub al, 30h ;Convert code to an actual integer cbw ;CONVERT BYTE TO WORD. This takes whatever number is in al and ;extends it to ax, doubling its size from 8 bits to 16 bits ;The first digit now occupies all of ax as an integer mov cx, 100d ;This is so we can calculate 100*1st digit +10*2nd digit + 3rd digit mul cx ;start to accumulate the 3 digit number in the variable imul cx ;it is understood that the other operand is ax ;AND that the result will use both dx::ax ;but we understand that dx will contain only leading zeros add number, ax ;save ;variable <number> now contains 1st digit * 10 ;---------------------------------------------------------------------- ;read SECOND DIGIT, multiply by 10 and add in mov ah, 1d ;bios code for read a keystroke int 21h ;call bios, it is understood that the ascii code will be returned in al mov second_digit, al ;may as well save a copy sub al, 30h ;Convert code to an actual integer cbw ;CONVERT BYTE TO WORD. This takes whatever number is in al and ;extends it to ax, boubling its size from 8 bits to 16 bits ;The first digit now occupies all of ax as an integer mov cx, 10d ;continue to accumulate the 3 digit number in the variable mul cx ;it is understood that the other operand is ax, containing first digit ;AND that the result will use both dx::ax ;but we understand that dx will contain only leading zeros. Ignore them add number, ax ;save -- nearly finished ;variable <number> now contains 1st digit * 100 + second digit * 10 ;---------------------------------------------------------------------- ;read THIRD DIGIT, add it in (no multiplication this time) mov ah, 1d ;bios code for read a keystroke int 21h ;call bios, it is understood that the ascii code will be returned in al mov third_digit, al ;may as well save a copy sub al, 30h ;Convert code to an actual integer cbw ;CONVERT BYTE TO WORD. This takes whatever number is in al and ;extends it to ax, boubling its size from 8 bits to 16 bits ;The first digit now occupies all of ax as an integer add number, ax ;Both my variable number and ax are 16 bits, so equal size mov ax, number ;copy contents of number to ax mov cx, 2h div cx ;Divide by cx mov half, ax ;copy the contents of ax to half mov cx, 2h; mov ax, number; ;copy numbers to ax xor dx, dx ;flush dx jmp prime_check ;jump to prime check print_question: mov dx, offset question ;print string (do you want to continue Y/N?) mov ah, 9h int 21h ;execute mov ah, 1h int 21h ;execute cmp al, 4eh ;compare je Exit ;jump to exit cmp al, 6eh ;compare je Exit ;jump to exit cmp al, 59h ;compare je Start ;jump to start cmp al, 79h ;compare je Start ;jump to start prime_check: div cx; ;Divide by cx cmp dx, 0h ;reset the value of dx je print_not_prime ;jump to not prime xor dx, dx; ;flush dx mov ax, number ;copy the contents of number to ax cmp cx, half ;compare half with cx je print_prime ;jump to print prime section inc cx; ;increment cx by one jmp prime_check ;repeat the prime check print_prime: mov dx, offset prime ;print string (this number is prime!) mov ah, 9h int 21h ;execute jmp print_question ;jumps to question (do you want to continue Y/N?) this is for repeat print_not_prime: mov dx, offset Not_prime ;print string (this number is not prime!) mov ah, 9h int 21h ;execute jmp print_question ;jumps to question (do you want to continue Y/N?) this is for repeat Exit: mov ah, 4ch int 21h ;execute exit END Start

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  • How to find vector for the quaternion from X Y Z rotations

    - by can poyrazoglu
    I am creating a very simple project on OpenGL and I'm stuck with rotations. I am trying to rotate an object indepentdently in all 3 axes: X, Y, and Z. I've had sleepless nights due to the "gimbal lock" problem after rotating about one axis. I've then learned that quaternions would solve my problem. I've researched about quaternions and implementd it, but I havent't been able to convert my rotations to quaternions. For example, if I want to rotate around Z axis 90 degrees, I just create the {0,0,1} vector for my quaternion and rotate it around that axis 90 degrees using the code here: http://iphonedevelopment.blogspot.com/2009/06/opengl-es-from-ground-up-part-7_04.html (the most complicated matrix towards the bottom) That's ok for one vector, but, say, I first want to rotate 90 degrees around Z, then 90 degrees around X (just as an example). What vector do I need to pass in? How do I calculate that vector. I am not good with matrices and trigonometry (I know the basics and the general rules, but I'm just not a whiz) but I need to get this done. There are LOTS of tutorials about quaternions, but I seem to understand none (or they don't answer my question). I just need to learn to construct the vector for rotations around more than one axis combined. UPDATE: I've found this nice page about quaternions and decided to implement them this way: http://www.cprogramming.com/tutorial/3d/quaternions.html Here is my code for quaternion multiplication: void cube::quatmul(float* q1, float* q2, float* resultRef){ float w = q1[0]*q2[0] - q1[1]*q2[1] - q1[2]*q2[2] - q1[3]*q2[3]; float x = q1[0]*q2[1] + q1[1]*q2[0] + q1[2]*q2[3] - q1[3]*q2[2]; float y = q1[0]*q2[2] - q1[1]*q2[3] + q1[2]*q2[0] + q1[3]*q2[1]; float z = q1[0]*q2[3] + q1[1]*q2[2] - q1[2]*q2[1] + q1[3]*q2[0]; resultRef[0] = w; resultRef[1] = x; resultRef[2] = y; resultRef[3] = z; } Here is my code for applying a quaternion to my modelview matrix (I have a tmodelview variable that is my target modelview matrix): void cube::applyquat(){ float& x = quaternion[1]; float& y = quaternion[2]; float& z = quaternion[3]; float& w = quaternion[0]; float magnitude = sqrtf(w * w + x * x + y * y + z * z); if(magnitude == 0){ x = 1; w = y = z = 0; }else if(magnitude != 1){ x /= magnitude; y /= magnitude; z /= magnitude; w /= magnitude; } tmodelview[0] = 1 - (2 * y * y) - (2 * z * z); tmodelview[1] = 2 * x * y + 2 * w * z; tmodelview[2] = 2 * x * z - 2 * w * y; tmodelview[3] = 0; tmodelview[4] = 2 * x * y - 2 * w * z; tmodelview[5] = 1 - (2 * x * x) - (2 * z * z); tmodelview[6] = 2 * y * z - 2 * w * x; tmodelview[7] = 0; tmodelview[8] = 2 * x * z + 2 * w * y; tmodelview[9] = 2 * y * z + 2 * w * x; tmodelview[10] = 1 - (2 * x * x) - (2 * y * y); tmodelview[11] = 0; glMatrixMode(GL_MODELVIEW); glPushMatrix(); glLoadMatrixf(tmodelview); glMultMatrixf(modelview); glGetFloatv(GL_MODELVIEW_MATRIX, tmodelview); glPopMatrix(); } And my code for rotation (that I call externally), where quaternion is a class variable of the cube: void cube::rotatex(int angle){ float quat[4]; float ang = angle * PI / 180.0; quat[0] = cosf(ang / 2); quat[1] = sinf(ang/2); quat[2] = 0; quat[3] = 0; quatmul(quat, quaternion, quaternion); applyquat(); } void cube::rotatey(int angle){ float quat[4]; float ang = angle * PI / 180.0; quat[0] = cosf(ang / 2); quat[1] = 0; quat[2] = sinf(ang/2); quat[3] = 0; quatmul(quat, quaternion, quaternion); applyquat(); } void cube::rotatez(int angle){ float quat[4]; float ang = angle * PI / 180.0; quat[0] = cosf(ang / 2); quat[1] = 0; quat[2] = 0; quat[3] = sinf(ang/2); quatmul(quat, quaternion, quaternion); applyquat(); } I call, say rotatex, for 10-11 times for rotating only 1 degree, but my cube gets rotated almost 90 degrees after 10-11 times of 1 degree, which doesn't make sense. Also, after calling rotation functions in different axes, My cube gets skewed, gets 2 dimensional, and disappears (a column in modelview matrix becomes all zeros) irreversibly, which obviously shouldn't be happening with a correct implementation of the quaternions.

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