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  • Creating a constant Dictionary in C#

    - by David Schmitt
    What is the most efficient way to create a constant (never changes at runtime) mapping of strings to ints? I've tried using a const Dictionary, but that didn't work out. I could implement a immutable wrapper with appropriate semantics, but that still doesn't seem totally right. For those who have asked, I'm implementing IDataErrorInfo in a generated class and am looking for a way to make the columnName lookup into my array of descriptors. I wasn't aware (typo when testing! d'oh!) that switch accepts strings, so that's what I'm gonna use. Thanks!

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  • Is there a good way to convert between BitmapSource and Bitmap?

    - by JohannesH
    As far as I can tell the only way to convert from BitmapSource to Bitmap is through unsafe code... Like this (from Lesters WPF blog): myBitmapSource.CopyPixels(bits, stride, 0); unsafe { fixed (byte* pBits = bits) { IntPtr ptr = new IntPtr(pBits); System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap( width, height, stride, System.Drawing.Imaging.PixelFormat.Format32bppPArgb,ptr); return bitmap; } } To do the reverse: System.Windows.Media.Imaging.BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap( bitmap.GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions()); Is there an easier way in the framework? And what is the reason it isn't in there (if it's not)? I would think it's fairly usable. The reason I need it is because I use AForge to do certain image operations in an WPF app. WPF wants to show BitmapSource/ImageSource but AForge works on Bitmaps.

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  • ConfirmButtonExtender using ModalPopupExtender fails in UpdatePanel after partial postback?

    - by Martin Emanuelsson
    Hello, We're trying to add a more fancy looking confirm messages than the regular JavaScript-confirm message to our delete-buttons in a list of comments on our site. To accomplish this we're trying to use the ConfirmButtonExtender together with a ModalPopupExtender. The comments are displayed using a ListView inside a UpdatePanel so that the paging of the ListView doesn't reload the entire page. Using the ConfirmButtonExtender works fine the first time the list is loaded but if we for instance go to the second page of comments using the pager, the ConfirmButtonExtender doesn't work anymore. The extender shows up when clicking Delete but when I click OK the page makes a full reload without triggering the delete event. Has anyone experienced the same problem and found a solution to it? Or can you recommend another way to accomplish the same thing? Best regards Martin Emanuelsson Göteborg, Sweden

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  • Telerik RadGrid doesn't display on first Page_Load but does on postback

    - by Mark
    I have a page with a drop-down. Based on the selection in the drop-down, data gets loaded and populates a RadGrid. I am using a custom user control for the EditTemplate, so I can't use radGrid.DataBind(). Instead, I have to use radGrid.MasterTableView.Rebind() in association with a NeedDataSource event handler. My problem is that when I load the page initially, I populate the drop-down and automatically select a value (first item in the list) which triggers the databinding on the RadGrid. I can step through the code in debug mode and see that the grid is being populated with data, but when the page displays, it doesn't get rendered. When I then manually choose an item from the drop-down, which triggers the same grid databinding code, it displays properly the second time. How do I get it to display the grid the first time the page loads?

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  • Intercept call to property get method in C#

    - by michajas
    Let's assume that we have this class: public class Person { public int Id { get; set; } public string Name { get; set; } } Now, is it possible in C# to intercept call to property get method, run some other method and return result of that method instead of property value? I'd like to be able to do some additional logic behind the scene. The downside is that this class can't be changed (on C# level). Maybe some IL ?

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  • Image map popup on rollover, with popup text drawn from database

    - by lbholland
    I have a custom map of the USA with about 20 polygonal hot spots. I would like a box to pop up next to each hot spot on hover, with text and links drawn from my DB specific to the location. I would have thought this is a common situation, but I can't find a solution that works. I tried using an asp:imagemap and an ajax popup extender but you can't assign IDs to hotspots and it doesn't support mouseover events. I tried css with an html image map but I can't figure out how to use css solutions with polygonal hot spots, and I also don't know how to link it to get the data from the db without asp targets (I'm not very familiar with jquery, which would work, I am guessing). Anyone know of any simple-ish solutions out there?

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  • Tracking changes in Entity Framework 4.0 using POCO Dynamic Proxies across multiple data contexts.

    - by Rob Packwood
    I started messing with EF 4.0 because I am curious about the POCO possibilities... I wanted to simulate disconnected web environment and wrote the following code to simulate this: Save a test object in the database. Retrieve the test object Dispose of the DataContext associated with the test object I used to retrieve it Update the test object Create a new data context and persist the changes on the test object that are automatically tracked within the DynamicProxy generated against my POCO object. The problem is that when I call dataContext.SaveChanges in the Test method above, the updates are not applied. The testStore entity shows a status of "Modified" when I check its EntityStateTracker, but it is no longer modified when I view it within the new dataContext's Stores property. I would have thought that calling the Attach method on the new dataContext would also bring the object's "Modified" state over, but that appears to not be the case. Is there something I am missing? I am definitely working with self-tracking POCOs using DynamicProxies. private static void SaveTestStore(string storeName = "TestStore") { using (var context = new DataContext()) { Store newStore = context.Stores.CreateObject(); newStore.Name = storeName; context.Stores.AddObject(newStore); context.SaveChanges(); } } private static Store GetStore(string storeName = "TestStore") { using (var context = new DataContext()) { return (from store in context.Stores where store.Name == storeName select store).SingleOrDefault(); } } [Test] public void Test_Store_Update_Using_Different_DataContext() { SaveTestStore(); Store testStore = GetStore(); testStore.Name = "Updated"; using (var dataContext = new DataContext()) { dataContext.Stores.Attach(testStore); dataContext.SaveChanges(SaveOptions.DetectChangesBeforeSave); } Store updatedStore = GetStore("Updated"); Assert.IsNotNull(updatedStore); }

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  • XNA vs SlimDX for offscreen renderer

    - by Groky
    Hello, I realise there are numerous questions on here asking about choosing between XNA and SlimDX, but these all relate to game programming. A little background: I have an application that renders scenes from XML descriptions. Currently I am using WPF 3D and this mostly works, except that WPF has no way to render scenes offscreen (i.e. on a server, without displaying them in a window), and also rendering to a bitmap causes WPF to fallback to software rendering. So I'm faced with having to write my own renderer. Here are the requirements: Mix of 3D and 2D elements. Relatively few elements per scene (tens of meshes, tens of 2D elements). Large scenes (up to 3000px square for print). Only a single frame will be rendered (i.e. FPS is not an issue). Opacity masks. Pixel shaders. Software fallback (servers may or may not have a decent gfx card). Possibility of being rendered offscreen. As you can see it's pretty simple stuff and WPF can manage it quite nicely except for the not-being-able-to-export-the-scene problem. In particular I don't need many of the things usually needed in game development. So bearing that in mind, would you choose XNA or SlimDX? The non-rendering portion of the code is already written in C#, so want to stick with that.

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  • Edit/Access data from a CheckBox column in an ASPX:GridView - c#

    - by Endo
    Hi, I have a GridView to which I bind a dataTable I manually create. Both the GridView and the dataTable contain 2 columns, Name and isBusy. My GridView looks like this <Columns> <asp:BoundField HeaderText="Name" DataField="Name" SortExpression="Name"> </asp:BoundField> <asp:CheckBoxField DataField="isBusy" HeaderText="Busy" SortExpression="isBusy" /> </Columns> That works fine, except that the Busy column is non-editable unless you set a specific row to edit mode. I require the entire column of checkboxes to be checkable. So I converted the column to a template, and so the columns look like this: <Columns> <asp:BoundField HeaderText="Name" DataField="Name" SortExpression="Name"> </asp:BoundField> <asp:TemplateField HeaderText="Busy" SortExpression="isBusy"> <ItemTemplate> <asp:CheckBox ID="isBusy" runat="server" Checked='<%# Eval("isBusy") %>' oncheckedchanged="CheckBoxBusy_CheckedChanged" /> </ItemTemplate> </asp:TemplateField> </Columns> Now, this throws an error at runtime, saying System.InvalidCastException was unhandled by user code Message="Specified cast is not valid." Source="App_Web_zzjsqlrr" StackTrace: at ASP.proyectos_aspx.__DataBinding__control24(Object sender, EventArgs e) in c:\Proyect\Users.aspx:line 189 at System.Web.UI.Control.OnDataBinding(EventArgs e) at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBind() at System.Web.UI.Control.DataBindChildren() InnerException: Any idea why this is happening? The next step I would need is to know how to set and get a checkbox's state (haven't been able to find how to manually check a checkbox). I appreciate very much any help.

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  • how to bind datasouce to the labels and pass parameter in XtraReport ?

    - by ahmed
    There's something that I don't get it yet in Xtrareport. I have to bind the datasource at runtime and also I have to assign the datasource to the labels programatically. Binding data at runtime is fine ,(and here's my question)I did not get from any examples to how should I bind the datasource to the labels and how to pass the parameter(UserId) from runtime and how to call the report from a webform. For example, I have a table called "User" with 3 fields: UserId, Username and Password. In the report designer I place 3 labels. Then I have a webform where the user is entering the userID and pulling some data and I have a print button on that webform when the user clicks the print button the data should be displayed on the report of UserId..

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  • AutoMapper Mapping IEnumerable to DataReader Issue

    - by user74825
    I am using AutoMapper to datareader using code as discussed below http://elegantcode.com/2009/10/16/mapping-from-idatareaderidatarecord-with-automapper/ I see it being very flakky...and unpredictable. 1) Same code with same datareader at times brings value back to the dto result set and at times doesnot. 2) I have an ID value coming from database as 100, 200. When it maps to the DTO that is of type integer this 100 is changed to a large value (like 234343211). Any ideas on why am I seeing this inconsitency. Should I be using the standard while (reader.Read())? and stop using automapper?

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  • SSL certificate on IIS 7

    - by comii
    I am trying to install a SSL certificate on IIS 7. I have download a free trial certificate. After that, this is the steps what I do: Click the Start menu and select Administrative Tools. Start Internet Services Manager and click the Server Name. In the center section, double click on the Server Certificates button in the Security section. From the Actions menu click Complete Certificate Request. Enter the location for the certificate file. Enter a Friendly name. Click OK. Under Sites select the site to be secured with the SSL certificate. From the Actions menu, click Bindings.This will open the Site Bindings window. In the Site Bindings window, click Add. This opens the Add Site Binding window. Select https from the Type menu. Set the port to 443. Select the SSL Certificate you just installed from the SSL Certificate menu. Click OK. This is the step where I get the message: One or more intermediate certificates in the certificate chain are missing. To resolve this issue, make sure that all of intermediate certificates are installed. For more information, see http://support.microsoft.com/kb/954755 After this, when I access the web site on its first page, I get this message: There is a problem with this website's security certificate. What am I doing wrong?

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  • Sending a Tuple object over WCF?

    - by Donut
    Is the System.Tuple class supported by WCF's Data Contract Serializer (i.e., can I pass Tuple objects to WCF calls and/or receive them as part or all of the result)? I found this page, but not the clear, definitive "you can send and receive Tuples with WCF" answer I was hoping for. I'm guessing that you can, as long as all of the types within the Tuple itself are supported by the Data Contract Serializer -- can anyone provide me with a more definitive answer? Thanks.

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  • JSON request failing because of line breaks, how to escape them?

    - by mrblah
    Hi, My JSON request seems to be failing because of line breaks (I am programatically weaving my own JSON string). How can I escape for line breaks? {"rc": "200", "m" : "", "o": "<div class='s1'> <div class='avatar'> <a href='\/asdf'>asdf<\/a><br \/> <strong>0<\/strong> <\/div> <div class='sl'> <p> 444444444 <\/p> <\/div> <div class='clear'> <\/div> <\/div>"} string jsonString = BuildJSON(someCollection).Replace(@"/", @"\/");

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  • The parameters dictionary contains a null entry for parameter

    - by ognjenb
    <%using (Html.BeginForm("OrderDevice", "ImportXML", FormMethod.Post)) { %> <table id="OrderDevices" class="data-table"> <tr> <th> DeviceId </th> <th> Id </th> <th> OrderId </th> </tr> <% foreach (var item in Model) { %> <tr> <td> <input readonly="readonly" class="" id="DeviceId" type="text" name="<%= Html.Encode(item.DeviceId) %>" value="<%= Html.Encode(item.DeviceId) %>" style="width: 61px" /> </td> <td> <input readonly="readonly" class="" id="c" type="text" name= "<%= Html.Encode(item.Id) %>" value=" <%= Html.Encode(item.Id) %>" style="width: 50px" /> </td> <td> <input readonly="readonly" class="" id="OrderId" type="text" name= " <%= Html.Encode(item.OrderId) %>" value="<%= Html.Encode(item.OrderId) %> " style="width: 49px" /> </td> </tr> <% } %> </table> <input type="submit" value="Create"/> <%} %> My controller action: [AcceptVerbs(HttpVerbs.Post)] public ActionResult OrderDevice(int id) { try { // TODO: Add insert logic here orderdevice ord = new orderdevice(); ord.Id = System.Convert.ToInt32(Request.Form["Id"]); ord.OrderId = System.Convert.ToInt32(Request.Form["OrderId"]); ord.DeviceId = System.Convert.ToInt32(Request.Form["DeviceId"]); XMLEntities.AddToorderdevice(ord); XMLEntities.SaveChanges(); return RedirectToAction("Index"); } catch { return View("Index"); } } When post a form I have this error: The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult OrderDevice(Int32)' in 'MvcKVteam.Controllers.ImportXMLController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter. Parameter name: parameters How fix it?

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  • Fancybox can't open partial view

    - by 1110
    I want to open partial view in fancybox like a modal view but when I click on the link it opens whole new page but it should open that in fancybox. I don't know if this is important but I have one more function that open images in fancybox (on the same page) and it works. Class names are different @Html.ActionLink("Feedback", "New", "Feedback", null, new { @class = "lightbox" }) JS $('.lightbox').fancybox(); Action method public ActionResult New() { return PartialView(); }

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  • Nhibernate exception - No persister for

    - by Muhammad Akhtar
    I am getting exception when calling Stored Procedure using Nhibernate and here is the exception No persister for: ReleaseDAL.ProgressBars, ReleaseDAL, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null here is class file public class ProgressBars { public ProgressBars() { } private Int32 _Tot; private Int32 _subtot; public virtual Int32 Tot {get { return _Tot; } set { _Tot = value; } } public virtual Int32 subtot { get { return _subtot; } set { _subtot = value; }} } here is my mapping file <hibernate-mapping xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:nhibernate-mapping-2.2" assembly="ReleaseDAL" namespace="ReleaseDAL" > <sql-query name="ps_getProgressBarData1" > <return alias="ProgressBars" class="ProgressBars"> <return-property name="Tot" column="Tot"/> <return-property name="subtot" column="subtot"/> </return> exec ps_getProgressBarData1 </sql-query> </hibernate-mapping> Calling Code public List<ProgressBars> getProgressBarData1(Guid ReleaseId) { ISession session = NHibernateHelper.GetCurrentSession(); List< ProgressBars> progressBar = (List<ProgressBars>)session.GetNamedQuery("ps_getProgressBarData1").List<ProgressBars>(); NHibernateHelper.CloseSession(); return progressBar; } I am introuble due to this exception, I did lot Google but no success, Please give idea to solve this problem. Thanks.........

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  • Multithreading recommendation based on program description

    - by user260197
    I would like to describe some specifics of my program and get feedback on what the best multithreading model to use would be most applicable. I've spent a lot of time now reading on ThreadPool, Threads, Producer/Consumer, etc. and have yet to come to solid conclusions. I have a list of files (all the same format) but with different contents. I have to perform work on each file. The work consists of reading the file, some processing that takes about 1-2 minutes of straight number crunching, and then writing large output files at the end. I would like the UI interface to still be responsive after I initiate the work on the specified files. Some questions: What model/mechanisms should I use? Producer/Consumer, WorkPool, etc. Should I use a BackgroundWorker in the UI for responsiveness or can I launch the threading from within the Form as long as I leave the UI thread alone to continue responding to user input? How could I take results or status of each individual work on each file and report it to the UI in a thread safe way to give user feedback as the work progresses (there can be close to 1000 files to process) Update: Great feedback so far, very helpful. I'm adding some more details that are asked below: Output is to multiple independent files. One set of output files per "work item" that then themselves gets read and processed by another process before the "work item" is complete The work items/threads do not share any resources. The work items are processed in part using a unmanaged static library that makes use of boost libraries.

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  • Populating FullCalendar events from MVC

    - by jasonmhirst
    I've having difficulty in populating FullCalendar from MVC and would like a little assistance on the matter please. I have the following code for my controller: Function GetEvents(ByVal [start] As Double, ByVal [end] As Double) As JsonResult Dim sqlConnection As New SqlClient.SqlConnection sqlConnection.ConnectionString = My.Settings.sqlConnection Dim sqlCommand As New SqlClient.SqlCommand sqlCommand.CommandText = "SELECT tripID AS ID, tripName AS Title, DATEDIFF(s, '1970-01-01 00:00:00', dateStart) AS [Start], DATEDIFF(s, '1970-01-01 00:00:00', dateEnd) AS [End] FROM tblTrip WHERE userID=18 AND DateStart IS NOT NULL" sqlCommand.Connection = sqlConnection Dim ds As New DataSet Dim da As New SqlClient.SqlDataAdapter(sqlCommand) da.Fill(ds, "Meetings") sqlConnection.Close() Dim meetings = From c In ds.Tables("Meetings") Select {c.Item("ID"), c.Item("Title"), "False", c.Item("Start"), c.Item("End")} Return Json(meetings.ToArray(), JsonRequestBehavior.AllowGet) End Function This does indeed run correctly but the format that is returned is: [[25,"South America 2008","False",1203033600,1227657600],[48,"Levant 2009","False",1231804800,1233619200],[49,"South America 2009","False",1235433600,1237420800],[50,"Italy 2009","False",1241049600,1256083200],[189,"Levant 2010a","False",1265414400,1267574400],[195,"Levant 2010a","False",1262736000,1262736000],[208,"Levant 2010a","False",1264982400,1267574400],[209,"Levant 2010a","False",1264982400,1265587200],[210,"Levant 2010","False",1264982400,1266969600],[211,"Levant 2010 b","False",1267056000,1267574400],[213,"South America 2010a","False",1268438400,1269648000],[214,"Levant 2010 c","False",1266364800,1264118400],[215,"South America 2010a","False",1268611200,1269648000],[217,"South America 2010","False",1268611200,1269561600],[218,"South America 2010 b","False",1268956800,1269388800],[227,"levant 2010 b","False",1265846400,1266192000]] And this is totally different to what I've seen on the post from here: http://stackoverflow.com/questions/2445359/jquery-fullcalendar-json-date-issue (note the lack of tag information and curly braces) Can someone please explain to me what I may be doing wrong and why my output isn't correctly formatted. TIA

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  • MVC2 MSchart with detail grid

    - by ben
    Hello, I need the capability to display a chart, click on a region and display the details in a jqgrid on the same page. I tried using a pie Chart and I can't seem to capture or create a click event for the chart. The data points contain a .url property which I can redirect to a different page but I need to display details on the same page like a master-detail page.

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  • Cannot debug views in MVC2 project, getting "The resource cannot be found" error

    - by schefdev
    I'm running Visual Studio 2008 sp1 on Win7, with MVC2 RTM installed. I created a new MVC2 project using the wizard and am unable to debug specific pages. With webforms and even MVC1, I was able to sit on a View page, hit F5, and then have the integrated web server in VS2008 start on the page I was working on. Very handy for building up app logic. When I try this now I get a "The resource cannot be found" error page. I retried this just now with a stock new MVC2 Web Application project. Here are the steps I took after creating the new project to reproduce: Open up project settings. Under the Web subtab, set the Start Action to "Current Page". Leave all the other settings as is. Open one of the views up (e.g. Account/Register.aspx) Hit F5 to debug the project Note that the browser window which displays shows the error message "The resource cannot be found". The link I saw in my browser for this run was: http://localhost:49471/Views/Account/Register.aspx I did some googling and found suggestions related to ensuring all HTTP server pieces were installed. I double checked and made sure that "HTTP Errors" and "HTTP Redirection" were both installed. If I leave the project setting as it was originally, set to "Specific Page" with nothing in the text box, then routing works and I always get the default home page. I'm hoping this isn't the only option. Thanks!

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