static void OnCommandOnTextChangedChanged(DependencyObject source, DependencyPropertyChangedEventArgs args)
{
TextBox sender = (TextBox)source;
var command = GetTextboxCommand(sender);
if (command != null)
{
command.Detach();
SetTextboxCommand(sender, null);
}
if (args.NewValue != null)
{
command = new TextboxCommand()
{
TextBox = sender,
Command = (ICommand)args.NewValue
};
command.Attach();
SetTextboxCommand(sender, command);
}
}
static void SetTextboxCommand(DependencyObject obj, TextboxCommand value)
{
obj.SetValue(TextboxCommandProperty, value);
}
