private void TxtTele_KeyUp(object sender, KeyEventArgs e) { switch (e.KeyCode) { case Keys.Enter: { TxtEMail.SelectAll(); TxtEMail.Focus(); break; } } }
private void EMail_Validating(object sender, CancelEventArgs e) { System.Text.RegularExpressions.Regex rEMail = new System.Text.RegularExpressions.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 (TxtEMail.Text.Length > 0) { if (!rEMail.IsMatch(TxtEMail.Text)) { MessageBox.Show("Invalid Email address", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); TxtEMail.SelectAll(); e.Cancel = true; } } }