2 Months Ago, ASP.NET Videos says (in How To: Understanding ASP.NET AJAX UpdatePanel Triggers) which specifies the controls on the page (or the user control, if you are using one) that will trigger a partial render of the UpdatePanel control in which the element resides. View Visual Basic tutorial View Visual C# tutorial.

3 Months Ago, davidbarkol from ASP.NET Weblogs says (in Asynchronous error handling change in ASP.NET AJAX 3.5) There is a subtle change in the .NET 3.5 release of the Microsoft Ajax Library that might catch some developers by surprise when handling asynchronous postback errors. The change can be found at the end of the endPostBack function of the PageRequestManager object. In the first release of the...