Forms Data Controls :: AppendDataBoundItems On DropDownList Causes Odd Behavior?
Sep 14, 2010
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.
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