Validating Indian Phone Number in .net c# windows form.

I think it may help you....

Validate user input in Windows Forms[^]

Use either Regular Expressions or masked textBox.

You should trust your googling skills as well.

System.Text.RegularExpressions.Regex expr;

        public bool email(string email)
        {
            expr =new  Regex(@"^[a-zA-Z][\w\.-]{2,28}[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$");
            if (expr.IsMatch(email))
            {
                return true;
            }
            else return false;
        }
        public bool phone(string no)
        {
            expr = new Regex(@"^((\+){0,1}91(\s){0,1}(\-){0,1}(\s){0,1}){0,1}9[0-9](\s){0,1}(\-){0,1}(\s){0,1}[1-9]{1}[0-9]{7}$");
            if (expr.IsMatch(no))
            {
                return true;
            }
            else return false;
        }

http://stackoverflow.com/questions/9513488/validating-indian-phonenumber-in-windows-form-application-using-net-c[^]

http://stackoverflow.com/questions/9596925/regular-expression-for-indian-phone-number[^]

http://www.dotnetspider.com/resources/37635-How-Validate-Indian-Phone-Number.aspx[^]

u can try these...

private void mobile_Validated(object sender, EventArgs e)
{
errorProvider2.SetError(mobile, "");
}
public bool ValidMobile(string mobileno, out string errorMessage1)
{

Regex ph = new Regex("^[7-9][0-9]{9}$");
if (ph.IsMatch(mobileno))
{
errorMessage1 = "";
return true;
}
errorMessage1 = "Mobile number must be valid...";
return false;

}


private void mobile_Validating(object sender, CancelEventArgs e)
{
if (!ValidMobile(mobile.Text, out string errorMsg))
{

e.Cancel = true;
mobile.Select(0, mobile.Text.Length);

this.errorProvider2.SetError(mobile, errorMsg);

}
}