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Question

Telerik radlistbox fires both OnClientItemChecked and OnClientSelectedIndexChanged when an item is checked

Answer 1

A:

I tried to reproduce the problem but was unable to do so (Windows 7 x64). I've tested the following code under Chrome 6.0, FireFox 3.6.10 and IE 8 and all behaved the same:

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;

<html xmlns="http://www.w3.org/1999/xhtml"&gt;
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="scm" runat="server" />


        <telerik:RadCodeBlock ID="radCodeBlock" runat="server">

        <script type="text/javascript">
            function OnClientSelectedIndexChanged(sender, eventArgs) {
                alert('OnClientSelectedIndexChanged');
            }
            function OnClientItemChecked(sender, eventArgs) {
                alert('OnClientItemChecked');
            }
            </script>
        </telerik:RadCodeBlock>

        <telerik:RadListBox 
            CheckBoxes="true" 
            EnableDragAndDrop="True" 
            ID="radListBox0" 
            OnClientItemChecked="OnClientItemChecked" 
            OnClientSelectedIndexChanged="OnClientSelectedIndexChanged" 
            runat="server" 
            SelectionMode="Single" 
            Visible="true">
            <Items>
                <telerik:RadListBoxItem Value="value1" Text="text1" />
                <telerik:RadListBoxItem Value="value2" Text="text2" />
                <telerik:RadListBoxItem Value="value3" Text="text3" />
            </Items>
        </telerik:RadListBox>
    </form>
</body>
</html>

Only a single client handler was invoked: either OnClientItemChecked or OnClientSelectedIndexChanged

Darin Dimitrov 2010-09-22 21:15:35

Thanks, that's good info. What version of Telerik ASP.NET controls are you using? Even when I just copy and paste your code in, both events trigger on check.

Matt 2010-09-22 21:22:21

Using `Telerik.Web.UI, Version=2010.2.826.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4` in ASP.NET 4.0 project. I've just downloaded a fresh copy directly from the telerik site and strangely the zip is called `Telerik.Web.UI_2010_2_826_Dev_hotfix.zip` :-)

Darin Dimitrov 2010-09-22 21:26:23

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Telerik radlistbox fires both OnClientItemChecked and OnClientSelectedIndexChanged when an item is checked

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