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RadGrid, paging, row selection, and RadTextBox issue

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Grid

This is a migrated thread and some comments may be shown as answers.

chrisjoelcowan asked on 29 Jul 2009, 10:09 PM

I've run into (what seems to be) a fairly bad bug. I've got it down into a proof-of-concept page which follows below. On the page there's a RadGrid, a button and a RadTextBox. If you select a row and click the "Click Me" button, then the selected row's index should appear in the RadTextBox. Now virtual scroll paging is enabled, so scroll to the second page, select a row, and then click "Click Me". Here I get an exception. It appears that the RadGrid has somehow forgotten it has a row selected. Moreover, if I change the RadTextBox to a native ASP.NET TextBox the crash doesn't happen.

Any input would be appreciated.

Environment: Visual Studio 2005, ASP.NET 2.0 w/ MS AJAX extension, and Telerik.Web.UI.dll version 2009.1.609.20. (I know that there is a new version of Telerik.Web.UI.dll, but I dropped in the latest version and it didn't seem to help.)

Edit: Also this crash seems to be browser dependent. I've seen it in IE6, and on IE8 in compatibility mode. In "normal" IE8 and in Firefox the crash doesn't happen. I need it to work in IE6.

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RadGridTest.aspx.cs" Inherits="RxLink.WebForms.Testing.RadGridTest" %> 
        
            <!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>Untitled Page</title> 
        
            </head> 
        
            <body> 
        
              <form id="form1" runat="server"> 
        
                <telerik:RadScriptManager ID="scriptManager" runat="server" /> 
        
                <telerik:RadGrid ID="grid" runat="server" AllowPaging="true" PageSize="10" 
        
                    Width="200px" OnNeedDataSource="grid_NeedDataSource" PagerStyle-Visible="false"> 
        
                  <ClientSettings EnablePostBackOnRowClick="true"> 
        
                    <Selecting AllowRowSelect="true" /> 
        
                    <Scrolling AllowScroll="true" EnableVirtualScrollPaging="true" /> 
        
                  </ClientSettings> 
        
                </telerik:RadGrid> 
        
                <asp:Button ID="button" runat="server" Text="Click Me" OnClick="button_Click" /> 
        
                <telerik:RadTextBox ID="radTextBox" runat="server" /> 
        
              </form> 
        
            </body> 
        
            </html>

    
            using System; 
        
            using System.Collections.Generic; 
        
            namespace RxLink.WebForms.Testing 
        
            { 
        
              public partial class RadGridTest : System.Web.UI.Page 
        
              { 
        
                protected void button_Click(object sender, EventArgs e) 
        
                { 
        
                  radTextBox.Text = Convert.ToString(grid.SelectedIndexes[0]); 
        
                } 
        
                protected void grid_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e) 
        
                { 
        
                  grid.DataSource = GetRange(); 
        
                } 
        
                static IEnumerable<int> GetRange() 
        
                { 
        
                  for (int i = 0; i <= 50; i++) 
        
                  { 
        
                    yield return i; 
        
                  } 
        
                } 
        
              } 
        
            }

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RadGrid, paging, row selection, and RadTextBox issue

5 Answers, 1 is accepted