public static String FormatTelephoneNumber(string phoneNumber, TelephoneFormat telephoneFormat)
{
string returnVal = String.Empty;
if (phoneNumber.Length > 0)
{
for (int x = 0; x < phoneNumber.Length; x++)
{
char strChar = Convert.ToChar(Mid(phoneNumber, x, 1));
if ((int) strChar > 47 && (int) strChar < 58) returnVal += Mid(phoneNumber, x, 1);
}
}
if (returnVal.Length == 11 && returnVal.StartsWith("1"))
{
returnVal = returnVal.TrimStart('1');
}
if (returnVal.Length == 10)
{
if (telephoneFormat == TelephoneFormat.Full)
{
returnVal = string.Format("({0}) {1}-{2}", returnVal.Substring(0, 3), returnVal.Substring(3, 3), returnVal.Substring(6));
}
if (telephoneFormat == TelephoneFormat.Dots)
{
returnVal = string.Format("{0}.{1}.{2}", returnVal.Substring(0, 3), returnVal.Substring(3, 3), returnVal.Substring(6));
}
if (telephoneFormat == TelephoneFormat.Hyphens)
{
returnVal = string.Format("{0}-{1}-{2}", returnVal.Substring(0, 3), returnVal.Substring(3, 3), returnVal.Substring(6));
}
}
return returnVal;
}