Updatepanel gives full postback instead of asyncpostback When using Dropdownlist inside listview inside Updatepanel . This Problem i faced when i had a listview which dynamically gets items and populates itemtemplate with dropdownlists . I had this listview inside an updatepanel and when selectionchanged event fires a complete postback was fired .
Solution to this problem i found out at this link http://stackoverflow.com/questions/4319156/updatepanel-gives-full-postback-instead-of-asyncpostback
OR
you can directly add ClientIDMode="AutoID"in listview
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ASP.NET
UpdatePanel, ASP.NET AJAX