Andrew Dixon
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Rank 1
Andrew Dixon
asked on 30 Aug 2011, 02:36 AM
Hi,
I have a RadListbox (single select mode) and a button which deselects all items in the RadListbox using clearSelection() in javascript. This appears to work, until there is a postback at which point the item is selected again.
Here is some example code which exhibits this problem
Is this a bug, or am I just missing something else that I need to do? I've seen trackChanges and commitChanges in the documentation but these seem to be needed only when adding or deleting ListItems clientside.
Thanks
Andy
I have a RadListbox (single select mode) and a button which deselects all items in the RadListbox using clearSelection() in javascript. This appears to work, until there is a postback at which point the item is selected again.
Here is some example code which exhibits this problem
(p_Postback_Click is just an empty event handler to cause a postback):<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TestClearSelection.aspx.cs" Inherits="TestClearSelection" %><%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %><!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"> <script type="text/javascript"> function ClearListbox() { lb = $find("RadListBox1"); lb.clearSelection(); } </script> <ajax:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true"></ajax:ScriptManager> <div> <telerik:RadListBox ID="RadListBox1" runat="server"> <Items> <telerik:RadListBoxItem Text="Item 1" /> <telerik:RadListBoxItem Text="Item 2" /> <telerik:RadListBoxItem Text="Item 3" /> </Items> </telerik:RadListBox> <asp:Button ID="b_ClearSelection" runat="server" Text="Clear Selection" onclientclick="ClearListbox(); return false;" /> <asp:Button ID="b_PostBack" runat="server" Text="Postback" onclick="b_PostBack_Click" /> </div> </form></body></html>Thanks
Andy
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Shinu
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Rank 2
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answered on 01 Sep 2011, 10:29 AM
Hello Andrew,
Try the following JavaScript to persist clear selection on postback.
JS:
Thanks,
Shinu.
Try the following JavaScript to persist clear selection on postback.
JS:
<script type="text/javascript">function ClearListbox() { lb = $find("RadListBox1"); lb.trackChanges(); lb.clearSelection(); lb.commitChanges();}</script>Thanks,
Shinu.