如何防止在未设置IsEnabled的情况下切换ToggleButton

您可以覆盖 OnToggle 方法通过不调用基实现来防止切换状态:

public class LockableToggleButton : ToggleButton
{
    protected override void OnToggle()
    {
        if (!LockToggle)
        {
            base.OnToggle();
        }
    }

    public bool LockToggle
    {
        get { return (bool)GetValue(LockToggleProperty); }
        set { SetValue(LockToggleProperty, value); }
    }

    // Using a DependencyProperty as the backing store for LockToggle.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty LockToggleProperty =
        DependencyProperty.Register("LockToggle", typeof(bool), typeof(LockableToggleButton), new UIPropertyMetadata(false));
}

<RadioButton Style="{StaticResource {x:Type ToggleButton}}"/>

或者,如果你已经有了 Style 为了它,就让它 BasedOn="{x:Type ToggleButton}" . 请注意,VisualStudio编辑器在第一种情况下显示错误,但它编译并正常工作。

这是hackey,但是如果您不需要自定义代码,您可以始终使用属性“ishitettvisible”,当您不希望他们取消选中它时,只需将ishitettvisible设置为false。但是,他们可能可以使用空格键对控件进行制表符切换。

Thomas的答案很好,但是您甚至不需要额外的依赖属性。如果让类inherit from ToggleButton重写OnToggle方法,并且更改ViewModel上的IsChecked绑定属性,则按钮将正确更新。

Xaml编号:

<myControls:OneWayFromSourceToTargetToggle x:Name="MyCustomToggleButton"
                                           Command="{Binding Path=ToggleDoStuffCommand}"
                                           CommandParameter="{Binding RelativeSource={RelativeSource Mode=Self}}"
                                           IsChecked="{Binding Path=ToggleIsCheckedConditionVar, 
                                                               Mode=OneWay}"
                                           />

添加了ToggleButton类:

public class OneWayFromSourceToTargetToggle : ToggleButton
{
   /// <summary>
   /// Overrides the OnToggle method, so it does not set the IsChecked Property automatically
   /// </summary>
   protected override void OnToggle()
   {
      // do nothing
   }
}

然后在ViewModel中将bool-ToggleIsCheckedCondition设置为true或false。这是一个很好的方法,因为您遵循良好的MVVM实践。

public bool ToggleIsCheckedCondition
{
   get { return _toggleIsCheckedCondition; }
   set
   {
      if (_toggleIsCheckedCondition != value)
      {
         _toggleIsCheckedCondition = value;
         NotifyPropertyChanged("ToggleIsCheckedCondition");
      }
   }
}

public ICommand ToggleDoStuffCommand
{
    get {
         return _toggleDoStuffCommand ?? 
               (_toggleDoStuffCommand = new RelayCommand(ExecuteToggleDoStuffCommand));
        }
}

private void ExecuteToggleDoStuffCommand(object param)
{
   var btn = param as ToggleButton;
   if (btn?.IsChecked == null)
   {
      return;
   }
   // has not been updated yet at this point
   ToggleIsCheckedCondition = btn.IsChecked == false;

   // do stuff

   }
}

在@Joachim Mairbck的伟大答案中添加一点,以防您想以编程方式执行相同的操作:

new RadioButton {
    ...
    GroupName = "myButtonGroup"
    Style = Application.Current.TryFindResource(typeof(ToggleButton)) as Style
    ...
}