public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
try
{
int result = int.Parse((string)value);
if (errorDisplay.IsError)
{
if (errorDisplay.ErrorField == bindingProperty)
{
errorDisplay.ErrorField = null;
}
errorDisplay.ResetFeedback();
}
return(result);
}
catch (Exception)
{
errorDisplay.ErrorField = bindingProperty;
errorDisplay.IsError = true;
errorDisplay.Feedback = "Could not convert text into a positive integer";
return(DependencyProperty.UnsetValue);
}
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
try
{
double conversion = Double.Parse((string)value);
if (conversion < 0 || conversion > 4)
{
throw new ArgumentOutOfRangeException();
}
if (errorDisplay.IsError)
{
if (errorDisplay.ErrorField == bindingProperty)
{
errorDisplay.ErrorField = null;
}
errorDisplay.ResetFeedback();
}
return(value);
} catch (Exception)
{
errorDisplay.ErrorField = bindingProperty;
errorDisplay.IsError = true;
errorDisplay.Feedback = "Could not convert text into a number between 0 and 4.0 inclusive";
return(DependencyProperty.UnsetValue);
}
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
string input = value.ToString();
foreach (char c in input)
{
if (!Char.IsDigit(c))
{
errorDisplay.ErrorField = bindingProperty;
errorDisplay.IsError = true;
errorDisplay.Feedback = "Student ID can only be a number";
return(DependencyProperty.UnsetValue);
}
}
if (errorDisplay.IsError)
{
if (errorDisplay.ErrorField == bindingProperty)
{
errorDisplay.ErrorField = null;
}
errorDisplay.ResetFeedback();
}
return(value);
}