How to autoformat a phone number

public string FormatTelephoneNumber(string phoneN)

{

           string d = string.Format("({0}) {1}-{2}", phoneN.Substring(0, 3), phoneN.Substring(3, 3), phoneN.Substring(6));

            return d;

}

Set the "TextMaskFormat" propety of the Masked Text Box to "ExcludePromptAndLiterals"

Hello Satish:

I have :-), the problem that I had is that the pnone number is a required field when saving the record, and I have added the following to the save event:

If TxtPhone.Text = "" Then

Msgbox "The Phone number is required"

Exit Sub

End if

When I am testing to see if would allow to save , it does save the record, because the Masked of the field is ( ) __-___, it thiks that is something in the field already.

No problem, Julius:

Private Sub TextBox1_Leave(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.Leave

Dim num As ULong

If TextBox1.Text.Length = 10 AndAlso ULong.TryParse(TextBox1.Text, num) Then

Dim pn As String = TextBox1.Text

TextBox1.Text = String.Format("({0}) {1}-{2}", pn.Substring(0, 3), pn.Substring(3, 3), pn.Substring(6))

Else

MessageBox.Show("Invalid phone number, please change")

End If

End Sub

I am sorry Alan, my mistake;  I am working in VB2005,  Thanks,

Julius

This should do it:

private void textBox1_Leave(object sender, EventArgs e)

ulong num;

if (textBox1.Text.Length == 10 && ulong.TryParse(textBox1.Text, out num))

string pn = textBox1.Text;

textBox1.Text = String.Format("({0}) {1}-{2}", pn.Substring(0,3), pn.Substring(3,3), pn.Substring(6));

else

MessageBox.Show("Invalid phone number, please change");