private void CashRecTxt_Validating(object sender, CancelEventArgs e)
{
if (CashRecTxt.Text != "" && grossLabel.Text != "")
{
if (!(Convert.ToSingle(grossLabel.Text) <= Convert.ToSingle(CashRecTxt.Text)))
{
CashRecTxt.Text = "";
CashBTXT.Text = "";
CashRecTxt.Focus();
}
}
}
private void CashRecTxt_TextChanged(object sender, EventArgs e)
{
if (CashRecTxt.Text != "")
{
if (!rg.Match(CashRecTxt.Text).Success)
{
CashRecTxt.Text = "";
CashRecTxt.Focus();
}
else
{
float amountGiven = Convert.ToSingle(CashRecTxt.Text);
float amountReturn = amountGiven - Convert.ToSingle(grossLabel.Text);
CashBTXT.Text = Math.Round(amountReturn, 0).ToString();
}
}
else
{
CashBTXT.Text = "";
}
}