Finding ModalPopupExtender with Code Behind (c#)

Gary King

15y5.1kAJAX

OK, so I have 3 different ModalPopupExtenders on my page, each with their own Panel.
The Panels all have a Cancel button.

When the user clicks on the Cancel button I want to execute a code behind function. I dont want to use the MPE CancelControlID as this only hides the modal popup and the OnClick of the Cancel button does not get called.

So, what I want to do is have a Cancel button with OnClick="CancelClicked"

Amongst other things, I want the CancelClicked function to hide the associated modal popup. How can I do this without explicitly naming the modal popup (because the function can be called from any of the 3 modals). I'm assuming that the object sender needs to be used, but how?

Thanks

4 Replies

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Gary King15y ago
OK, so I have managed to get the Button's ID and furthermore the Button's Panel ID.
The problem is that the Panel has no relationship back to the MPE (although the panel has a relationship to the panel via the PopupControlID property).
Therefore I don't think that it is possible to do exactly what I want to do the way that I thought it could be done.

You further suggestion to use the CancelControlID will not work either, because if you define a CancelControlID, then the OnClick function of the button itself will not execute.

However, I do have a workaround.....

If I use similar ID's for both the MPE and the Button, then I can use string manipulation to hide the MPE.
For example, MPE ID = mpeSomething and Cancel button ID = btnCancelSomething.
All I have to do is get the button ID as string, replace "btnCancel" with "mpe", cast the result as type MPE and then Hide it.
Vulpes15y ago
Sorry I should have read the question more carefully.

You can get the button which is clicked like this:

Button btn = (Button)sender;
string ID = btn.ID;

If you then compare this ID with the CancelControlId property of the 3 ModalPopupExtenders, you can deduce one which of the three is applicable.
Gary King15y ago
Firstly, I'm not sure how to cast 'sender' to ModalPopupExtender.
Also, surely the sender is actually the button, not the MPE.

So, please could you ellaborate on how this can be achieved (code sample would be greatly appreciated)

protected void ModalCancelClicked(object sender, EventArgs e)
{
???
}
Vulpes15y ago
You'll need to cast 'sender' to ModalPopupExtender and then examine its ID property to see which one of the three called it.