Ran into a strange problem recently. I had a ASP.NET page with date textbox on it that had an Ajax MaskedEditExtender, MaskedEditValitdator, and AJAX Calendar Extender. The extenders were all pretty vanilla for a date fields, the code is below.

The problem I was seeing was that the Calendar would always popup when the page loaded, even though that field didn't have focus. The problem ended up being simple, but I didn't see it documented anywhere: I had the code in the folowing order:

• ASP:Textbox
• AJAX:MaskedEditExtender
• AJAX:MaskedEditValidator
• AJAX: Calendar Extender
  

Moving the Calendar Extendar to the top of the extenders resolved the issue.

1 Comment

1. Anonymous on March 3, 2010 at 10:57 AM

   Thank you so much! I was stuck with this problem for the last 2 days.