Template Column with a DatePicker. Going into edit works fine but on insert i get an 'Specific Cast Invalid' error.
<telerik:GridTemplateColumn HeaderText="Start Date" UniqueName="StartDate">
<ItemTemplate>
<asp:Label ID="lblStartDate" runat="server" Text='<%# Bind("StartDate") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<telerik:RadDatePicker ID="rdpStartDate" SelectedDate='<%# Bind("StartDate") %>' runat="server">
</telerik:RadDatePicker>
</EditItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn HeaderText="Start Date" UniqueName="StartDate">
<ItemTemplate>
<asp:Label ID="lblStartDate" runat="server" Text='<%# Bind("StartDate") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<telerik:RadDatePicker ID="rdpStartDate" SelectedDate='<%# Bind("StartDate") %>' runat="server">
</telerik:RadDatePicker>
</EditItemTemplate>
</telerik:GridTemplateColumn>