private static void OnSetCommandCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
{
TextBox textBox = dependencyObject as TextBox;
if (textBox != null)
{
TextBoxCommandBehavior behavior = GetOrCreateBehavior(textBox);
behavior.Command = e.NewValue as ICommand;
}
}
private static TextBoxCommandBehavior GetOrCreateBehavior(TextBox textBox)
{
TextBoxCommandBehavior behavior = textBox.GetValue(KeyUpCommandBehaviorProperty) as TextBoxCommandBehavior;
if (behavior == null)
{
behavior = new TextBoxCommandBehavior(textBox);
textBox.SetValue(KeyUpCommandBehaviorProperty, behavior);
}
return(behavior);
}