RadAjax for ASP.NET
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Client confirmation and AJAX Send comments on this topic.
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How-to > Client confirmation and AJAX

Glossary Item Box

One may need to provide a confirmation dialog to the users and initiate an AJAX request if accepted. Confirmation using standard post backs often looks like this:

ASPX Copy Code
<asp:ImageButton ID="ImageButton1" runat="server" OnClientClick="return confirm('Are you sure?');" />
The OnClientClick should be changed a bit to work with AJAX:
ASPX Copy Code
<asp:ImageButton ID="ImageButton2" runat="server" OnClientClick="if (!confirm('Are you sure?')) return false;" />
when the button is ajaxified by added the necessary AJAX setting to RadAjaxManager or when the button is placed within RadAjaxPanel control.

 

Alternatively, the OnRequestStart client-side event could be used to implement more complex logic. Here is a sample script:

JavaScript Copy Code
   <script type='text/javascript'>
            function OnRequestStart(ajaxControl, eventArgs)
            {
                var eventTarget = eventArgs.EventTarget;
                if (eventTarget == "<%= ImageButton1.UniqueID %>")
                {
                    return confirm('Are you sure?');
                }
                else
                {
                    return false;
                }
            }

 

You can review the Cancellation of AJAX requests online demo, where this approach is followed.

 

 

 

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