I have a ModalPopupExtender that I am using to notify users with. It uses the .Show method on the page load if a condition is met. The problem is when the popup is shown, there after any event triggered in an update panel makes the popup show again. I am able to fix this by placing the Popup in an update panel and calling the .Hide method on postback. However, this breaks the functionality of the ProgressPanel; the progress panel will not go away it keeps displaying, also all UpdatePanelAnimations become stuck just as the ProgressPanel does.

Any suggestions are welcome,

 
Thank you.

 

Ok, for lack of time and other options, I've fubbed the script - and got it to work.

 Instead of  

modalPopup.Show();

ClientScript.RegisterStartupScript(this.GetType(), "ModalPopup", 
  "var done=false; Sys.Application.add_load(function() {if (!done) {AjaxControlToolkit.ModalPopupBehavior.invokeViaServer('ctl00_MainContentPlaceHolder_ModalPopupExtender1', true);} done=true; });", true);

Brutish, perhaps, but it worked. Perhaps the next release can have a "run once" attribute for the server call...

Raithlin:

ClientScript.RegisterStartupScript(this.GetType(), "ModalPopup", 
  "var done=false; Sys.Application.add_load(function() {if (!done) {AjaxControlToolkit.ModalPopupBehavior.invokeViaServer('ctl00_MainContentPlaceHolder_ModalPopupExtender1', true);} done=true; });", true);

Really nice !!! I was looking for a way to call a javascript function on the page_load, but my javascript function is already written in the page. 

So,  the Sys.Application.add_load solve my problem !