I have placed a dropdown list in the edititemtemplate of a formview control and followed specific MSDN instructions on how to bind the list source to a separate SQL lookup data source but have the formview bound to the main data source. If I set the selecteditem value to bind to the formview control I always get the following error:
'DropDownList2' has a SelectedValue which is invalid because it does not exist in the list of items.
This is my asp:
<asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True" DataSourceID="SqlDataSource2" DataTextField="Type" DataValueField="Type" selectedvalue='<%# Bind("ServiceProviderType") %>'> </asp:DropDownList>
I have read over 50 posts on this and got nowhere - HELP!