void ConvertCommandExecute()
{
if (FirstValue.Trim() == null)
{
MessageBox.Show("You must enter a value.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
else
{
if (FirstLabel == "Arabic")
{
int number = 0;
try
{
number = int.Parse(FirstValue.Trim());
if (number < 1)
{
MessageBox.Show("You can not enter a negative value", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
else
{
arabic = new Arabic(FirstValue);
SecondValue = arabic.ConvertToRoman(number);
}
}
catch (Exception)
{
MessageBox.Show("You did not enter an arabic number, try again.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
else if (FirstLabel == "Roman")
{
String number = FirstValue.Trim();
roman = new Roman(FirstValue);
SecondValue = roman.ConvertToArabic();
}
}
}