javascript validation for start-end datetime columns

[Minh]

Hi,

I have a

1) start datetime column
2) End datetime column

I'm hoping to avoid having to rewrite everything and create a gridtemplate column for validation. I was wondering about anyway to perform javascript functions to warn the user that the End datetime column must always be greater than the start datetime column.


thanks,
Minh Bui

[Shinu]

Hello Minh,

The easiest way is to use compare validation which gives the same required functionality.
aspx:

<EditItemTemplate>
   <telerik:RadDateTimePicker ID="radstarttime" runat="server" Width="225px">
   </telerik:RadTimePicker>
   <telerik:RadDateTimePicker ID="radendtime" runat="server" Width="225px">
   </telerik:RadTimePicker>
   <asp:CompareValidator ID="crvEndTime" runat="server" ControlToCompare="radstarttime" ControlToValidate="radendtime" Operator="GreaterThanEqual" ErrorMessage="End Time Must be Greater than Start Time" >
   </asp:CompareValidator>
</EditItemTemplate>

 
Thanks,
Shinu.