get first char in RadMaskedTextBox onkeypress event

[Rhbkv]

We are using "RadInput.Net2.dll" and RadMaskedTextBox for phone number. We want to check if first character of area code should not be 0 or 1.

If we use CustomValidator and javascript as below, it is working fine.
For example, if phone # is "[phone]" and if I replace 3 as 1, I could see the correct error message. But if I delete 3, I can see numbers in text box as "(_16) 446-2777". But still I can see the error message as "This number cannot begin with a 1 or 0.". The prompt character is not part of the args.value.

I want to display the error message only if first character after ( is 0 or 1. Could you please help us to find out the first character only of the input text
Thanks in advance.

<radI:RadMaskedTextBox ID="txtPhone" runat="server">
             </radI:RadMaskedTextBox><br />

            <asp:CustomValidator id="revBusinessPhone" Display="dynamic" runat = "server" ControlToValidate="txtPhone"  ErrorMessage = "This number cannot begin with a 1 or 0." ClientValidationFunction ="validateLength"  ></asp:CustomValidator>



   function validateLength(oSrc, args) {

         var phnVal = args.Value;

         if (((phnVal1.substring(0, 2)) == "(1" || (phnVal.substring(0, 2) == "(0"))) {
             oSrc.innerText = "This number cannot begin with a 1 or 0.";
              args.IsValid = false;

         }
         else {
         var regex = /^(\([0-9]\d{2}\)|[0-9]\d{2})[- .]?\d{3}[- .]?\d{4}$/;
            if (regex.test(phnVal)) {
                  args.IsValid = true;
             }
             else {
                 oSrc.innerText = "This number must contain 10 digits.";
                  args.IsValid = false;
             }
         }
         return true;
     }

[Vasil]

Hello Rhbkv,

By design the RadMaskedTextBox uses plain value for the validation field. It is like "164462777" in your case.
If you like to get the formatted value you could use this code:

var phnVal1  = $find("txtPhone").get_displayValue();

This will get the value the same way as it looks to the user.

Greetings,
Vasil
the Telerik team

[Rhbkv]

Thank you very much Vasil!