DropDownList “has a SelectedValue which is invalid because it does not exist in the list of items”

Question

I have a ASP.NET DropDownList, which I data-bind to a list of objects, and then it throws an exception. This error is driving me nuts, because the message is wrong, and the

Answer 1

You can use below code to clear data on DropDownList

_ddlRequest.Items.Clear()