<telerik:GridTemplateColumn HeaderText="Tarikh Luput" HeaderStyle-HorizontalAlign="Center" UniqueName="ExpDate">
<HeaderStyle Width="100px" />
<ItemTemplate>
<telerik:RadDatePicker ID="dtExp" runat="server" AutoPostBack="true" OnSelectedDateChanged="dtExp_TextChanged"
DBSelectedDate='<%# IIf(IsDBNull(Eval("EXPIRY_DATE")), Nothing, Convert.ToDateTime(Eval("EXPIRY_DATE")))%>'>
<DateInput
DateFormat="MM/dd/yyyy"
DisplayDateFormat="dd/MM/yyyy"
runat="server" >
</DateInput>
</telerik:RadDatePicker>
</ItemTemplate>
</telerik:GridTemplateColumn>
It returns "Object cannot be cast from DBNull to other types." error. Help?