RadDatePicker Custom validator onclick of button

[Sucheta Patil]

Hi guys,
I have a RadDatePicker (txtDOB) and it is a mandatory field.
I have used the RFV for txtDOB which validates txtDOB but
I have a search button which searches for the DOB and returns some value.
If I enter 'abcdefg' in txtDOB and click Search button it gives me 
        Nullable object must have a value.

What is the custom validator in Javascript to validate alphabets and invalid input on click of button.
I have seen your demo which did not help me.Here is my code below.......

<li>
         <asp:Label ID="lbDOB" runat="server" Text="Date of Birth: (dd/mm/yyyy)"
             AssociatedControlID="txtDOB" Height="35px" Width="300px"></asp:Label>
         <telerik:RadDatePicker ID="txtDOB" runat="server" DateFormat="dd/MM/yyyy"
             Culture="English (United Kingdom)" Width="125px" MinDate="01/01/1950 00:00:00"  >

         </telerik:RadDatePicker>
       <asp:Button ID="btnSearch" runat="server" CausesValidation="true"
           Text="Search" onclick="btnSearch_Click" />
            <asp:RequiredFieldValidator ID="RFV_txtDOB" runat="server"
             ControlToValidate="txtDOB" ErrorMessage="Please enter DOB"
             ValidationGroup="DateValidate" Font-Size="Large" SetFocusOnError="true" Display="dynamic">*</asp:RequiredFieldValidator>

    </li>

.
Please help me.
S

[Princy]

Hello,



Give a try with the folowing code in ClientValidationFunction of CustomValidator and see whether it helps.

Client code:

<script type="text/javascript">
    // ClientValidationFunction of CustomValidator
    function ClientValidationFunction1(sender, args) {
        var datepicker = $find("<%=RadDatePicker1.ClientID%>");
        if (datepicker.get_dateInput()._invalid) {
            alert("Invalid");
            args.IsValid = false;
        }
    }
</script>

Thanks,
Princy.