private void btnCalcRate_Click(object sender, RoutedEventArgs e)
{
CalcRate origin = (CalcRate)cb_ActiveCountryRate.SelectedItem;
CalcRate destination = (CalcRate)cb_AllcountriesRate.SelectedItem;
if (origin != null && destination != null)
{
if (string.IsNullOrWhiteSpace(tb_insertRate.Text))
{
MessageBox.Show("Insert a value to convert");
return;
}
string input = tb_insertRate.Text;
if (Regex.IsMatch(input, @"^-?[0-9][0-9,\.]+$"))
{
tb_rateResult.Text = $"{tb_insertRate.Text} {origin} correspond to: {Environment.NewLine} " +
$" {Convert.ToString(decimal.Round(Convert.ToDecimal(UIData.CalculateRate(origin, destination, Convert.ToDecimal(input))), 2))} {destination.Name}";
}
else
{
MessageBox.Show("The value to be converted must be numeric");
return;
}
}
else
{
MessageBox.Show("You have to choose currencies to convert");
return;
}
}