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AppendDataBoundItems on DropDownList causes odd behavior

Posted By:      Posted Date: September 14, 2010    Points: 0   Category :ASP.Net
I may just thinking wrong about this but I have a problem that is causing me to want to pull my hair out:I have two DropDownLists.Call them ddl1 and ddl2. I am binding ddl1 to a DataTable on page_load using if not IsPostBack and allowing view state to keep it populated.I am then binding ddl2 to another DataTable based on the selected item in ddl1 on the SelectedIndexChanged event on ddl1.My problem is that when I set ddl2's AppendDataBoundItems="true", it just appends the items in the DataTable each time I select a new ddl1 item, so that if I change the selected item in ddl1 3 times, I end up with items in ddl2 from the 2 previous selections as well as the current ddl1 selection.This doesn't happen when I set ddl2's AppendDataBoundItems="false". Obviously, this is not desiariable behaviour.Any ideas anyone?

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