/// <summary>
/// Validates Ssn. If it's not valid, it shows an error message in the ssnErrorLabel
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ssnTextBox_Validating(object sender, CancelEventArgs e)
{
if (ssnTextBox.Text.Length < 1)
{
ssnErrorLabel.Text = "Required";
ssnErrorLabel.Visible = true;
ssnTextBox.BackColor = SystemColors.Control;
}
if (handler.IsValidSsn(ssnTextBox.Text, out string errorMsg))
{
ssnErrorLabel.Visible = false;
ssnTextBox.BackColor = SystemColors.Window;
}
else
{
ssnErrorLabel.Visible = true;
ssnErrorLabel.Text = errorMsg;
ssnTextBox.BackColor = SystemColors.Control;
}
}