private static void SetupAndValidate(TextBox textBox)
{
TextBoxFormatValidationHandler handler;
if ((handler = GetFormatValidationHandler(textBox)) == null)
{
handler = new TextBoxFormatValidationHandler();
SetFormatValidationHandler(textBox, handler);
}
else
{
handler.Validate();
}
}
/// <summary>
/// Sets the FormatValidationHandler property. This dependency property
/// indicates the handler that checks the format in the TextBox.
/// </summary>
public static void SetFormatValidationHandler(DependencyObject d, TextBoxFormatValidationHandler value)
{
d.SetValue(FormatValidationHandlerProperty, value);
}