/// <summary>
/// Ensure the new value of Increment dependency property change is valid,
/// or revert the change and throw an exception.
/// </summary>
/// <param name="d">The DependencyObject whose DependencyProperty is changed.</param>
/// <param name="e">The DependencyPropertyChangedEventArgs.</param>
private static void EnsureValidIncrementValue(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
NumericUpDown nud = (NumericUpDown)d;
double number;
if (!IsValidDoubleValue(e.NewValue, out number) || number <= 0)
{
// revert back to old value.
nud._levelsFromRootCall++;
nud.SetValue(e.Property, e.OldValue);
nud._levelsFromRootCall--;
// throw ArgumentException
string message = string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.NumericUpDown_EnsureValidIncrementValue_InvalidValue,
e.NewValue);
throw new ArgumentException(message, "e");
}
}
/// <summary>
/// Ensure the new value of a dependency property change is a valid double value,
/// or revert the change and throw an exception.
/// </summary>
/// <param name="d">The DependencyObject whose DependencyProperty is changed.</param>
/// <param name="property">The DependencyProperty that changed.</param>
/// <param name="oldValue">The old value.</param>
/// <param name="newValue">The new value.</param>
private static void EnsureValidDoubleValue(DependencyObject d, DependencyProperty property, object oldValue, object newValue)
{
NumericUpDown nud = d as NumericUpDown;
double number;
if (!IsValidDoubleValue(newValue, out number))
{
// revert back to old value
nud._levelsFromRootCall++;
nud.SetValue(property, oldValue);
nud._levelsFromRootCall--;
// throw ArgumentException
string message = string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.NumericUpDown_EnsureValidDoubleValue_InvalidDoubleValue,
newValue);
throw new ArgumentException(message, "newValue");
}
}