validating a textbox for 10 digit mob no.

Question

i have created a textbox validation for 10 digit mob number but this is not working am i wrong anywhere

 

 

private void Validatemobnum(string Mobile)

{

Regex rx1 = new Regex("^[1-9]{10}");

if (rx1.IsMatch(Mobile))

{

throw new Exception("Only Numbers without decimal value are allowed");

}

}

 

 

i have creatted a method and calling at textbox leave event  

 

 

private void addsuppliermob_Leave(object sender, EventArgs e)

{

try

{

Validatemobnum(addsuppliermob.Text);

}

catch (Exception ex)

{

MessageBox.Show(ex.Message, "Please Check Mob ", MessageBoxButtons.OK, MessageBoxIcon.Error);

addsuppliermob.Text = "";

addsuppliermob.Focus();

return;

}

}