Как я присоединяю команды к проверке и снятию выделения CheckBox?

Другое решение, похожее на решение Эдди: Attached Command Behaviors by Marlon Grech

Вы также можете использовать свойство Command CheckBox, чтобы присоединить только одну команду, в которой вы проверьте, установлен ли флажок ...

Или вы можете привязать свойство IsChecked к свойству вашей ViewModel и реагировать на изменение в установщике этого свойства.

ну, вы можете унаследовать от элемента управления checkBox, добавить две команды в качестве свойств (Dependency Propertiess), а затем переопределить методы OnChecked и OnUnchecked и запустить каждую команду в соответствующем месте

This relates to Eddie's answer.

I played around with it a bit and it is great I also created a little template for creating new commands. I'm using it with Sharpdevelop as a code snippet. Just paste the following into your code (e.g.via a snippet):

#region $nameCommand

    public static readonly DependencyProperty $nameCommand =
        EventBehaviourFactory.CreateCommandExecutionEventBehaviour(
            Control.$nameEvent, "$nameCommand", typeof (ControlBehavior));

    public static void Set$nameCommand(DependencyObject o, ICommand value)
    {
        o.SetValue($nameCommand, value);
    }

    public static ICommand Get$nameCommand(DependencyObject o)
    {
        return o.GetValue($nameCommand) as ICommand;
    }

    #endregion 

Then do a search replace for "$name" with the name of the Event/Command e.g. MouseEnter

ote, it is importand, that you make sure you pick the right classname for the owner (in my case ControlBehavior.

I am attaching a class I created for common Mouse commands in the hopes that other people share as well and we don't just implement the same thing over and over, where we could have saved a lot of time by sharing. Here my complete ControlBehavior class (I did only implement the events that I needed so far):

public static class ControlBehavior
    {
        #region MouseEnterCommand

        public static readonly DependencyProperty MouseEnterCommand =
            EventBehaviourFactory.CreateCommandExecutionEventBehaviour(
                Control.MouseEnterEvent, "MouseEnterCommand", typeof (ControlBehavior));

        public static void SetMouseEnterCommand(DependencyObject o, ICommand value)
        {
            o.SetValue(MouseEnterCommand, value);
        }

        public static ICommand GetMouseEnterCommand(DependencyObject o)
        {
            return o.GetValue(MouseEnterCommand) as ICommand;
        }

        #endregion

        #region MouseLeaveCommand

        public static readonly DependencyProperty MouseLeaveCommand =
            EventBehaviourFactory.CreateCommandExecutionEventBehaviour(
                Control.MouseLeaveEvent, "MouseLeaveCommand", typeof (ControlBehavior));

        public static void SetMouseLeaveCommand(DependencyObject o, ICommand value)
        {
            o.SetValue(MouseLeaveCommand, value);
        }

        public static ICommand GetMouseLeaveCommand(DependencyObject o)
        {
            return o.GetValue(MouseLeaveCommand) as ICommand;
        }

        #endregion


        #region MouseDoubleClickCommand

        public static readonly DependencyProperty MouseDoubleClickCommand = 
            EventBehaviourFactory.CreateCommandExecutionEventBehaviour(
            Control.MouseDoubleClickEvent, "MouseDoubleClickCommand", typeof (ControlBehavior));

        public static void SetMouseDoubleClickCommand(Control o, ICommand command)
        {
            o.SetValue(MouseDoubleClickCommand, command);
        }

        public static void GetMouseDoubleClickCommand(Control o)
        {
            o.GetValue(MouseDoubleClickCommand);
        }

        #endregion

        #region MouseLeftButtonDownCommand

        public static readonly DependencyProperty MouseLeftButtonDownCommand =
            EventBehaviourFactory.CreateCommandExecutionEventBehaviour(
                Control.MouseLeftButtonDownEvent, "MouseLeftButtonDownCommand", typeof (ControlBehavior));

        public static void SetMouseLeftButtonDownCommand(DependencyObject o, ICommand value)
        {
            o.SetValue(MouseLeftButtonDownCommand, value);
        }

        public static ICommand GetMouseLeftButtonDownCommand(DependencyObject o)
        {
            return o.GetValue(MouseLeftButtonDownCommand) as ICommand;
        }

        #endregion

    }

By using above template it took me only a few seconds for each command.

Я сделал это с помощью триггера IsChecked, который устанавливает команду.

например.

<Style x:Key="checkBoxStyle" TargetType="{x:Type CheckBox}">
      <Style.Triggers>
        <Trigger Property="IsChecked" Value="True">
          <Setter Property="Command"
                  Value="{Binding AddThingCommand}" />
        </Trigger>
        <Trigger Property="IsChecked" Value="False">
          <Setter Property="Command"
                  Value="{Binding RemoveThingCommand}" />
        </Trigger>
      </Style.Triggers>
    </Style>