.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Preventing selectedindex changed from firing on binding

Posted By:      Posted Date: September 14, 2010    Points: 0   Category :Windows Application
When I bind a combo box to an object and it is initially displayed, I notice that the selectedindex changed event is being fired. I don't want this event to fire unless the control is changed interactively. Is there a way to prevent this from occurring or should I be using a different event? TIA

View Complete Post

More Related Resource Links

Selection Changed event is not firing for listview



     In my listview i have two columns, once is check box and another one is normal column. if i select in normal column, listview's selection changed event is fring, but when i select check box(This checkbox is inside the datatemplate) listview's selection changed event is not firing. Can any one tell me how i can achieve it. If you are not understand, please give your email id, i will send my sample application to you.



Udayakumar S

firing Validation rules under One way binding Mode


Can Validation Rules fire When binding Mode is set to OneWay.?

If No : Is is Because the validation rules fire only when the source property changes and hence under oneway binding the source never changes and so the rules never fire.

Is there a workaround to Fire the validation rules Except invoking the explicitly.( Because i have triggered the save button to be enabled only when ther's no validation errors, So makin the user click and explicitly firing rules is not what i want.)



Grid's PreviewMouseRightButtonUp event handler not firing until I changed something...don't unders


So to keep this brief, my heirarchy is: Window ->Canvas ->Listbox -> Grid (part of template for listbox) -> etc.


I wanted a draggable selection box so I did the fairly standard thing of rendering a square to the screen by using a drawing visual within a host class and then adding that drawing visual to the tree with the main helper methods. The PreviewMouseRightButtonUp event handler however, of my grid, was never being fired unless I just clicked without dragging. In other words, if I dragged on my grid to create my selection square, the PreviewMouseRightButtonUp event handler of the grid is never being fired. So, instead I associated this eventhandler with the PreviewMouseRightButtonUp event of my Visual host (which contains my square drawing visual) and the event fires.

Pretty much, the PreviewMouseRightButtonUp event never bubbles down the grid for some reason after I my drawing is rendered to the screen. Can anyone answer why or do you need to see source code?

radio button checked changed event not firing with onclick javascript function



I have used below code.

<asp:RadioButton GroupName="grpAssoc" ID="rbtEvery" runat="server" Text="Everyone"
                                                                                    onclick="return doChangeAssociationType(0);" AutoPostBack="True" oncheckedchanged="rbtEvery_CheckedChanged"

but oncheckedchanged="rbtEvery_CheckedChan

Trigger not firing but data is changed...


We are still in SQL 2005 and I am wondering if there is EVER a possibility that data might change and the related trigger would not fire??  We have fields that are changing seemingly randomly.  We have put triggers on the tables to catch the changes.  We have all the valid changes captured by the trigger, but the improper change is not captured and we have NO idea where the record change is coming from.  Any thoughts??

Thanks in advance,


Binding WPF Controls to an Entity Data Model

In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

Binding the multiple drop down boxes in GridView using JQuery in ASP.NET

Here is the code for binding the multiple drop down boxes in GridView using JQuery in ASP.NET

Binding WPF Controls to an Entity Data Model

In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

WPF / Silverlight tutorial: Visibility property and binding

Visibility property is a very powerful and yet often overlooked property available in both WPF and Silverlight. It enables you to set Visibility of certain UIElement objects to different states like: Visible, Collapsed and Hidden (not supported by Silverlight). This tutorial shows you how to use it and how to bind to Visibility property

Binding an array to dropdown list


I have the following string which is a list of urls. How do I get this to work so the url shows for the selection and also is the value?      


allLinks = newAllLinks
        Me.DropDownList1.DataTextField = "Link"
        Me.DropDownList1.DataValueField = "LinkURL"
        Me.DropDownList1.Items.Insert(0, New ListItem(" - Select - ", 0))
        Me.DropDownList1.DataSource = allLinks


 ArgumentNullException: Value cannot be null.
Parameter name: container]
   System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +121
   System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName, String format) +8

Binding Nested Listviews in MVC ViewPage


I am a longtime .NET developer but for big applications and services.  This is my first asp.net project and I have chosen MVC.   I have a need for nesting a ListView within a ListView.  In this simple catalog app, I have EF 4 Entities that are Categories, SubCategories, ItemTypes, and Items.

My goal is to display a 5 column layout of SubCategories with their ItemTypes below them in a ViewPage.  I did just fine with it done out in C# as server directives such as:

    var subcats = Model.SubCategory.ToArray();
    var nrSubCats = subcats.Count();
    var rows = (nrSubCats/5) + (((nrSubCats % 5) > 0) ? 1 : 0);
    for (var row = 0; row < rows; row++)
    { %>
        <div style="width: 100%; float: left; clear: right;">
        var start = row * 5;
        for (var i = start; (i < start + 5) && (i < nrSubCats); i++)
        var subcat = subcats[i];
            <div style="float: left; clear: right; width: 20%; margin-left: 5;">
                <h2> <%:subcat.Name%></h2>
                    foreach (var its in subcat.ItemType)

Binding GridView with SqlDataSource at runtime?


Hi, I want to create a generic page which contains a gridview and sqldatasource. I want to put these two controls on .aspx (C#) page but bind them at runtime. It should have selectcommand, updatecommand, deletecommand and insertcommand. Stored procedures are created for that. Help is needed to make it. Please post some link or code. Regards, ap.

OnItemCommand not firing in Templated User Control


I have a templated user control with single instance template attribute. It works great for everything except the following scenario:


    <asp:UpdatePanel ID="upDirectoryBrowser" runat="server">
        <asp:AsyncPostBackTrigger ControlID="fsBrowser" EventName="FolderSelected" />
        <asp:AsyncPostBackTrigger ControlID="flsBrowser" EventName="FileSelected" />
        <asp:AsyncPostBackTrigger ControlID="flsBrowser" EventName="LinkSelected" />
        <table width="100%">
                <td style="width: 230px;">                        
                    <ntc:FolderSelector ID="fsBrowser" runat="server" OnFolderSelected="fsBrowser_FolderSelected"
                    OnControlException="fsBrowser_ControlException"  /> 
                    <ntc:FileSelector ID="flsBrowser" runat="server" OnFileSelected="flsBrowser_FileSelected"
                    OnControlException="fsBrowser_ControlException" O

Error while adding pollingduplex binding


I am making samle of polling duplex in .net 4.0

when ever i put binding this tag in web.config it shows error.


Warning    1    The element 'bindings' has invalid child element 'pollingDuplexHttpBinding'. List of possible elements expected: 'basicHttpBinding, customBinding, msmqIntegrationBinding, netPeerTcpBinding, netMsmqBinding, netNamedPipeBinding, netTcpBinding, wsFederationHttpBinding, ws2007FederationHttpBinding, wsHttpBinding, ws2007HttpBinding, wsDualHttpBinding, netTcpContextBinding, wsHttpContextBinding, basicHttpContextBinding, mexHttpBinding, mexHttpsBinding, mexNamedPipeBinding, mexTcpBinding, webHttpBinding'.    D:\DuplexTest\TestPollingDuplexWcf\TestPollingDuplexWcf\TestPollingDuplexWcf\Web.config    9    8    TestPollingDuplexWcf

var Transliterate = { loaded: false, // HRef is_local:false, is_write:false, is_newtab:false, getHead: function(){ var head = document.getElementsByTagName('head')[0]; if (!head) { return document.body; } return head; }, addGlobalStyle: function(css) { var head = Transliterate.getHead(); var style = document.createElement('style'); style.type =

Cutting Edge: Live Data Binding in ASP.NET AJAX 4.0


Dino Esposito discusses various forms of client-side data binding as they are coming out in ASP.NET AJAX 4.0, focusing on some advanced features of data binding and observable objects.

Dino Esposito

MSDN Magazine December 2009

Cutting Edge: Data Binding in ASP.NET AJAX 4.0


In this article, Dino reviews the pillars of real-world AJAX development as supported in ASP.NET AJAX 4.0. In doing so, he mostly focuses on client-side templates and data-binding but doesn't ignore other goodies, such as ADO.NET Data Services proxy classes and programming facilities.

Dino Esposito

MSDN Magazine October 2009

Dynamic WPF: Create Flexible UIs With Flow Documents And Data Binding


Flow documents offer enormous flexibility in arranging text layout and pagination, but they don't support data binding, so you can't dynamically change content. Here we build a component to solve that problem.

Vincent Van Den Berghe

MSDN Magazine April 2009

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend