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• Alternatives to ASCX User Control without a server-side form?

  - by Andrew Murray

  I've got an ASP.NET 3.5 Web Forms application in which a large chunk of code needs to be duplicated between a few different pages. Sounds like the ideal candidate for a user-control right? Problem is, this cannot be contained within a <form runat="server"> because it contains a client-side form of it's own. There are no runat=server controls or postbacks or anything that really need that webform - think of it just as a chunk of HTML with a few basic <% %> tags. I'd just want to set a property on the control when it's loaded, so that it knows what to output. This is purely an exercise to make the code easier to maintain. Before I resort to using an oldskool <!--#include-->, is there some better way of doing this?

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• What's the best way to write a maintainable web scraping app?

  - by Benj

  I wrote a perl script a while ago which logged into my online banking and emailed me my balance and a mini-statement every day. I found it very useful for keeping track of my finances. The only problem is that I wrote it just using perl and curl and it was quite complicated and hard to maintain. After a few instances of my bank changing their webpage I got fed up of debugging it to keep it up to date. So what's the best way of writing such a program in such a way that it's easy to maintain? I'd like to write a nice well engineered version in either Perl or Java which will be easy to update when the bank inevitably fiddle with their web site.

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• Replicate Printed Form With Web Form

  - by Michael

  I'm hoping people have some ideas to help solve this problem. I am developing a C# ASP.NET website and the client requires an online form that users will fill in and submit. OK, so far so good..... Imagine, say, a form that you fill in on paper - they normally have a distinctive look specific to the company and will be filed, quite possibly as a legally binding document. I need to have an online form that when submitted emails the client with something they can print out and will look exactly like their printed forms. As this is web based, I think the option of capturing a screenshot are out the question, so I'm wondering how best to approach this? Even if I just had a form that captures the data presented how I want, how could I translate this data into the view they want? Any ideas and suggestions greatly appreciated.

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• Is it possible to reference a linkbotton outside an update panel as the update trigger?

  - by Selase

  I have a page based on a master page and as such i can only see the content place holders i used in the master page showing up in the aspx pages based on the master page. the source code shown below: <%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="CaseAdmin.aspx.cs" Inherits="Prototype4.CaseAdmin" %> <%@PreviousPageType VirtualPath="~/Account/Login.aspx"%> <asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server"> </asp:Content> <asp:Content ID="CaseRightNews" ContentPlaceHolderID="RightNewsItem" runat="server"> </asp:Content> <asp:Content ID="CaseLeftNav" ContentPlaceHolderID="LeftNavigation" runat="server"> <div style="margin-top:20px; margin-bottom:20px;"> <p class="actionButton"> <asp:LinkButton ID="OpenCaseLinkButton" runat="server" onclick="OpenCaseLinkButton_Click">Open Case</asp:LinkButton> </p> <p class="actionButton"><asp:LinkButton ID="RegisterExhibitLinkButton" runat="server" onclick="RegisterExhibitLinkButton_Click">Register Exhibit</asp:LinkButton> </p> </div> </asp:Content> <asp:Content ID="CaseMainContnt" ContentPlaceHolderID="MainContent" runat="server"> <asp:ScriptManager ID="ScriptManager" runat="server" /> <asp:UpdatePanel ID="CaseMainCntntUpdatePanel" UpdateMode="Conditional" runat="server"> <Triggers> <asp:AsyncPostBackTrigger ControlID="" eventname="Click"/> </Triggers> <ContentTemplate> <%--Some text here to inform user to click on the open case botton to display open case form--%> </ContentTemplate> </asp:UpdatePanel> <asp:UpdatePanel runat="server" id="UpdatePanel1" updatemode="Conditional"> <Triggers> <asp:AsyncPostBackTrigger ControlID="" eventname="Click"/> </Triggers> <ContentTemplate> <%--some text here to inform users to click on the add exhibit botton to display add exhibit form--%> </ContentTemplate> </asp:UpdatePanel> </asp:Content> the section of the entire page i wish to change upon update is the (this is the main content of the page). for this reason i placed the updatepanel inside the content place holder since it cant be sitting outside and not wrapped in a content place holder. However, the buttons that i wish to apply the trigger that fires the update to, are in another content place holder(). How can i possibly get those buttons to act as the trigger while changing only what appears in the main content area. Plus, i tried getting the updatepanel to work just so i could see if it does the update well but it turned out really bad. i added some linkbottons in the content template area and used them as the triggers for testing reasons. i tested and the changes took over the entire page in contrast to just appearing in the content area. I actually just wanted to load a form that is created in another asp. page into the main content area... I seriously need help with this... Every little help, detail and information is dearly appreciated... thanks so much in advance

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• RS 232 Communication in ASP.NET 3.5?

  - by Pandiya Chendur

  using ASP.NET 3.5 WebForm using C# 3.0, is it possible to setup a RS 232 communication with a device? I need the WebForm to be able to read and write data to the serial port. I would appreciate if there are some good examples, thanks. I understand that under Components, there is a SerialPort .NET Component, but it seems to me that it can only be used in a Windows application (WinForm). Or the only solution is to rely on the ActiveComport Serial Port Toolkit, as from http://www.activexperts.com/activcomport/howto/aspnetc/ ?

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• Best way to globally set every control's ValidationGroup property in an asp.net?

  - by Steve Flook

  I have a User Control with form items that is re-used considerably throughout a large web application, and up until this point the validation summary upon an invalid form submission is being handled by the .aspx that consumes the User Control. Now I need to set the ValidationGroup property at runtime for each of my form items controls (textboxes, lists, validators, etc). Rather than do it manually by setting each control I'm interested in iterating through all the controls in the User Control, detecting if that control has a ValidationGroup property, and setting it's value that way. Something like this: For Each ctrl As System.Web.UI.Control In Me.Controls ' so now what is the proper way to detect if this control has the ValidationGroup property Next Code sample in vb.net or c# works for me. Many thanks!

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• immplementing security with session variables, how it is insecure

  - by haansi

  Hello, I am doing web based projects in dotnet. Currently I am implementing security using session variables. I keep current user id and user type in session and authenticate user from these session variables (say Session["UserId"],Session["UserName"] and Session["UserType"]) I do authentications. Please guide me how it is insecure ? I heard such security can be broken and applications can be hacked very easily, like it is possible to get session id and directly connect to that session id etc. Please guide me on this thanks

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• very simple WebForm with masterpage

  - by Ryan

  I use method=get to send my data from one webform to the other. But I don't want to have in the URL querry things like: Search.aspx?_EVENTTARGET=&_EVENTARGUMENT=&_VIEWSTATE=%2FwEPDwUKLTYwODIwNTg5MQ9kFgJmD2QWAgIDDxYCHgZtZXRob2QFA2dldGRkGOirvzjoAxt%2BfOb915%2FpsYZXmAxLZZdpnK6UW7A9%2Fk83D&_PREVIOUSPAGE=cog5Yzt_1GerH9r2ERTIPbLWMCwMFYteZjmDYCbBO3vobCG4C_mWM7GZMNuBesyAjw77cvuNKl_aSUYzeajiW6W0CjI0tLB6ikjcM4t5Kbg1&__EVENTVALIDATION=%2FwEWAgKYsPjPDQKY24%2FQBBH4CPejKl3spy0A%2BtpMxb%2BCGVGJf73dYtmaEnIFF4IR&name=Amy&state=24&ctl00%24MainContent%24submit=Searchbut i only want the name and the state to be in the Get querry like: ?name=Amy&state=24 <configuration> <authentication mode="Forms"> <forms loginUrl="~/Account/Login.aspx" timeout="2880" /> </authentication> <membership> <providers> <clear/> <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" /> </providers> </membership> <profile> <providers> <clear/> <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/> </providers> </profile> <roleManager enabled="false"> <providers> <clear/> <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" /> <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" /> </providers> </roleManager> </system.web> <system.webServer> <modules runAllManagedModulesForAllRequests="true"/> </system.webServer> </configuration>

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• SharePoint WSS 3.0 - Fastest approach to build data-bound forms?

  - by Rusty Scupper

  Pardon the vague question, but I've just inherited a project to build a couple dozen forms pulling data from a SQL 2005 database. The forms are mostly standard database lookups with just a couple updates so the data layer is very simple -- I'm the DBA -- but we just recently started using SharePoint WSS 3.0 for a departmental web site and I would prefer to integrate these forms into WSS rather than build a separate standalone ASP.NET app. I'm hoping there is some RAD framework out there that integrates with WSS for data bound forms. I've been searching online, but haven't found anything very promising and the data viewer web part in SharePoint Designer looks complicated to integrate with an external SQL database. TIA, Rusty

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• overwrite parameters passed by querystring

  - by opensas

  I have the following problem I have a web framework built with classic asp that saves the page state in hidden textboxes, and then issues a submit to itself. Before submitting, we have a javascript functions that saves the action in a hidden "action" input, and then performs the submit. The page loads the state from those hidden texts, reads the action issued, reads extra parameters, like the id of the record to edit, and then builds the page accordingly. I'd like to make a url link to automatically start the page with "edit" action on a "x" id. So I was thinking about building the following url, for example http://myapp/user?action=edit&id=23 the problem is that when the page auto-submits, que url string keeps the parameters. I'd like to achieve the following: when the user clicks on http://myapp/user?action=edit&id=23 my page should receive the posted values action=edit and id=23 but the url should be just http://myapp/user and both parameters should be kept in the hidden texts... (I wonder if I make myself clear...) thanks a lot saludos sas ps: I have a couple of ideas about how to solve it, but I'll post them as answers...

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• Cache web forms in client side

  - by Martin Ongtangco

  is it possible to cache form contents on client side? Like maintaining state even if the form is un-saved and the user moves to a new page then returns back to the form?

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• how to: get rid of __doPostBack from link buttons?

  - by b0x0rz

  for example: this code: <asp:LinkButton ID="SignInLinkButton" runat="server" CssClass="SignInLinkButton" TabIndex="3" OnClick="AuthorizeUser">SignIn</asp:LinkButton> shows this as link in status bar: javascript:__doPostBack('ctl00$ctl00$GlobalPageContentPlaceHolder$ManagePageContentPlaceHolder$SignInLinkButton','') is there a chance o get rid of this ugliness? or is there a better way of doing this, that does not generate this insanity? i searched, but did not find an answer, so links are also cool. thnx

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• How can I tell if a <script> tag with a given src attribute is present on the page in ASP.net?

  - by Chris McCall

  Like the title says, I'm trying to find out if I need to include a script library that my ASP.net UserControl needs to work. I don't want to include it multiple times per page, but I want my control to be able to be used multiple times on the same page. How can I, in the codebehind of my control, check to see if a given <script/> tag is present? This is .Net 2.0, no LINQ.

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• Multipage forms for joomla (looking outside the box)

  - by John Snow

  I have created a number of forms using various Joomla components which have more or less worked successfully. Recently I have attempted to create mult-page forms - the forms work...but they are slow as molasses. Having spent a couple of weeks trying to resolve this and not seeing any signs of improvement ...... I wonder if anyone has experience of using hosted forms services in Joomla either using a wrapper or as a static page within a Joomla site. Any pointers or recommendations would be appreciated.

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• Rails: include index with fields_for form helper

  - by Patrick Oscity

  i'm trying to build two models from one form by using the fields_for method. my code looks like this: <% for scale in @event.scales %> <% f.fields_for "scale[]", scale do |scale_form| %> <p> Scale<br /> <%= scale_form.label :name %> <%= scale_form.text_field :name %> <%= scale_form.label :price %> <%= scale_form.text_field :price %> </p> <% end %> <% end %> but unfortunately the output html is missing the id's of the scales: <p> Scale<br /> <label for="event_scale__name">Name</label> <input id="event_scale__name" name="event[scale][][name]" size="30" type="text" /> <label for="event_scale__price">Price</label> <input id="event_scale__price" name="event[scale][][price]" size="30" type="text" /> </p> ... here's the corresponding controller and model: class EventsController < ApplicationController ... def new @event = Event.new @providers = Provider.find(:all, :order => :name) 3.times { @event.scales.build } respond_to do |format| format.html end end ... end class Event < ActiveRecord::Base has_many :scales ... end what am i doing wrong?

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• Can an ASP.NET user control determine its context or its parent .aspx file

  - by John Galt

  Is it possible for a user control to determine its "context" or its parent .aspx page in some way? Right now I have a user control that is declared on a typical .aspx page as follows: <%@ Register TagPrefix="uc1" TagName="ManageTitle" Src="../UserControls/ManageTitle.ascx" %> The user control currently emits a textbox as follows: <asp:textbox id="txtTitle" runat="server" MaxLength="60" ToolTip="Describe the item with a short pithy title - most important keywords first"/> The page_load for this .ascx file is currently like this: Me.txtTitle.Text = SetPageTitle() While some places in this web app need this (i.e. a textbox where end-user can type a "title"), I have other places where I want to show the "title" information in a "read-only" way. For example, rather than a textbox, I could use a label control or a textbox with Enabled="false" to prevent data entry. I suppose I could clone this small .ascx file and append a suffix to its name like _RO.ascx or something but I am wondering what the best approach would be. In short, can a user control get some sort of "context" from the page that declares it or is there an altogether better way to accomplish this sort of thing? Thank you.

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• Why is my condition onsubmit not returning false?

  - by Liso22

  After asking a couple of questions I managed to create this form. I didn't have troubles making it return false if the submitted value was 0 but I cannot make it return false when it's the string 'Cambia de ciudad". I'm sure I'm messing with the quotes or something like that. This is the form: <form role="search" method="get" action="http://chusmix.com/" onsubmit="if (document.getElementById('s')== 'Cambiá de ciudad") return false;'> <input class="ubicacion" name="s" id="s" tabindex="1" onsubmit="if ((document.getElementById('s').value.length < 4) || (document.getElementById('s')== 'Cambiá de ciudad')) return false;" onfocus="if (this.value=='Cambiá de ciudad') this.value = ''" onblur="if(this.value == '') this.value = 'Cambiá de ciudad'" type="text" maxlength="80" size="28" value="Cambiá de ciudad"> <input type="submit" id="searchsubmit" value="Buscar" /> </form> How do I make it work? Thanks

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• c#.net id duplicate reported untruthfully

  - by tracer tong

  I am getting an error in visual studio that appears to be flat out wrong. Here it is: The tag contains duplicate 'ID' attributes. on the following line: Rica.Yoodul.MiniSites.BaseMiniSiteUserControl ucMaster = (Rica.Yoodul.MiniSites.BaseMiniSiteUserControl)Page.LoadControl("~/MiniSites/" + templateName + "/Master.ascx"); I have checked though both the master and child pages for repeats of the id I last added (the only one added since last successful test) and the ID is used once across both files. Other than controls (e.g ), is there anything this error refers to? Or is there a workaround? I have checked I am editing the right files. On the face of it this appears to be a visual studio bug, but I want to be sure.

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• implementing security with session variables, how it is insecure

  - by haansi

  I am doing web based projects in dotnet. Currently I am implementing security using session variables. I keep current user id and user type in session and authenticate user from these session variables (say Session["UserId"],Session["UserName"] and Session["UserType"]). Please help me understand how this could be insecure. I've heard that such security can be broken and applications can be hacked very easily, like it is possible to get session id and directly connect to that session id etc. Please guide me on this.

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• Best way in asp.net to force https for an entire site?

  - by theminesgreg

  About 6 months ago I rolled out a site where every request needed to be over https. The only way at the time I could find to ensure that every request to a page was over https was to check it in the page load event. If the request was not over http I would response.redirect("https://mysite.com") Is there a better way -- ideally some setting in the web.config?

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• Using Forms authentication with remote auth system?

  - by chobo

  I am working on a website that uses a remote websites database to check for authentication (they are both share some database tables, but are separate website...) Right now I check the username and password against the remote websites account / member table, if there is a match I create a session. Questions: Is this secure? On authenticated pages I just check if a session of a specific type exists.Is it possible for someone to create an empty session or something that could bypass this? Is it possible to use Forms authentication with this setup? Right now if a user is authenticated I just get an object back with the username, email and id.

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• Check if web form values has changed. Best practice

  - by Andrew Florko

  Hello everybody, I have multi-step form and user can navigate to any page to modify or add information. There is a menu that shows progress and steps user completed. This menu allows to navigate to any step user completed or going to complete. Inspite of big button "Save and Continue" some users click this menu to navigate further. I have to check - if values have changed in a form and ask: "Save changes? Yes/No". What is the best way (with minimum code) you suggest me to check if form values have changed. Thank you in advance!

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• HTML select form with option to enter custom value

  - by Ib33X

  I would like to have input field that users can enter custom text value or choose from drop down, normal select only offers drop down options. How can it accept custom value for instance ford? <select> <option value="volvo">Volvo</option> <option value="saab">Saab</option> <option value="mercedes">Mercedes</option> <option value="audi">Audi</option> </select> Edit: I used this http://bit.wisestamp.com/uncategorized/htmljquery-editable-combo-2/ solution. Also I tried jquery ui combobox and it is not working properly

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• Can I automatically attach to the lifecycle of ANY server-enabled HTML tag?

  - by Deane

  If a "server-enabled" HTML tag is in a Web form, like this -- <p runat="server"/> -- is there any way for me to attach to its rendering? I assume once they have runat="server", they must have a lifecycle of some kind. I'd like to attach some code to the rendering of any HTML tag so enabled. So, whenever a template author puts runat="server" on a tag, I can catch the PreRender (or anything else) and execute some code. Possible?

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• Load ascx via jQuery

  - by Raika

  Is there a way to load ascx file by jQuery? UPDATE: thanks to @Emmett and @Yads.i am use the handler and the ajax: jQuery.ajax({ type: "POST", //GET url: "Foo.ashx", data: '{}', contentType: "application/json; charset=utf-8", dataType: "json", success: function (response) { jQuery('#controlload').append(response.d); // or response }, error: function () { jQuery('#controlload').append('error'); } }); but i,m just getting an error. my ajax is wrong? Another Update : i am using error: function (xhr, ajaxOptions, thrownError) { jQuery('#controlload').append(thrownError); } and this what i get : Invalid JSON: Test =(this test is label inside my ascx) and my ascx file after Error!!! Another Update : my ascx file is somthing like this: <asp:DropDownList ID="ddl" runat="server" AutoPostBack="true"> <asp:ListItem>1</asp:ListItem> <asp:ListItem>2</asp:ListItem> </asp:DropDownList> <asp:Label ID="Label1" runat="server">Test</asp:Label> but when I call ajax i get this error in asp: :( Control 'ctl00_ddl' of type 'DropDownList' must be placed inside a form tag with runat=server.

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