Ok,  so technically that does prevent it from remaining collapsed, but you can still see the panel collapse then expand again.  So again, this isn't a completely desirable result.  But, if that's our only option then I suppose we'll just have to live with it.

Thanks.

Hi,

Here is the code snippet:

function WebPanel1_ExpandedStateChanging(oWebPanel, oEvent){
 //Add code to handle your event here.
 oEvent.cancel = true;
 
}

Let me clarify what this code will do.

 If the panel is expanded - it will remain expanded - it will not collapse then expand. I will remain expanded.

 If the panel is collapsed - it will remain collapsed.  You should see no visible changes.

Aside from the fact that I'm using VB, I don't see any differences between your code snippet and mine:

    Protected Sub myPanel_ExpandedStateChanging(ByVal sender As Object, ByVal e As Infragistics.WebUI.Misc.WebPanel.ExpandedStateChangingEventArgs) Handles myPanel.ExpandedStateChanging
            e.Cancel = True
    End Sub

The panel is starting out in the expanded state and it does, very quickly, collapse then expand again.  So, I'm not sure why it's doing this for me if it's not supposed to/doesn't happen for other people.

It seems as though that was my problem - I didn't actually realize you could disable the postbacks for specific events like that, so that was helpful.  Anyway, I disabled the postbacks and added the javascript and it works like a charm.

Thanks for your help.