RadListBox - stopping an autopostback

[Uday]

Hi,

I have a RadListbox in the below fashion

<telerik:RadListBox ID="chkTools" runat="server" CheckBoxes="True" AutoPostBack="True"
OnItemCheck="chkTools_ItemCheck" EnableEmbeddedSkins="False" OnClientItemChecked="onItemChecked" 
OnClientItemChecking="onItemChecking"></telerik:RadListBox>

If i want to stop the post happening based on a condition which even should I use OnClientItemChecked or OnClientItemChecking and how should it be?

[Kate]

Hello Uday,

If you need to prevent the postback of the page (and thus preventing the onitemcheck event to fire) you will need to use the OnClientItemChecking event and the following client side function:

<script type="text/javascript">
        function onItemChecking(sender, args) {
            args.set_cancel(true);
        }
    </script>

Here is also the markup that I used:

<telerik:RadListBox ID="chkTools" runat="server" CheckBoxes="True" AutoPostBack="True"
            OnClientItemChecking="onItemChecking" onitemcheck="chkTools_ItemCheck">
        <Items>
            <telerik:RadListBoxItem Text="item1" Value="1" />
            <telerik:RadListBoxItem Text="item2" Value="2" />
            <telerik:RadListBoxItem Text="item3" Value="3" />
            <telerik:RadListBoxItem Text="item4" Value="4" />
            <telerik:RadListBoxItem Text="item5" Value="5" />
            <telerik:RadListBoxItem Text="item6" Value="6" />
            <telerik:RadListBoxItem Text="item7" Value="7" />
        </Items>
    </telerik:RadListBox>

All the best,
Kate
the Telerik team