我可以将RoutedCommand绑定到WPF中的命令吗？

Question

我有一个ViewModel的形式：

class VM : DependencyObject
{
    // This class exposes a command to data binding to delete things from the model
    public static DependencyProperty DeleteProperty = DependencyProperty.Register(/*...*/);

    public static ICommand Delete {
        get {
            return (ICommand)this.GetValue(DeleteProperty);
        }
        set {
            this.SetValue(DeleteProperty, value);
        }
    }
}

对于ListBoxItem我想将ApplicationCommands.Delete数据绑定到此ViewModel公开的ICommand 。 这样，当有人按下引发ApplicationCommands.Delete的菜单项时，如果当前专注于此内容，则将选择此特定删除：

<!-- Elsewhere... -->
<MenuItem Text="Delete" Command="ApplicationCommands.Delete" />

<!-- Some data template with DataContext == the above DependencyObject -->
<Grid>
    <Grid.CommandBindings>
        <!--
        I want ApplicationCommands.Delete to forward to the command {Binding Delete}
        -->
        <CommandBinding Command="ApplicationCommands.Delete" 
                        ???
                        />
    </Grid.CommandBindings>
</Grid>

...但是CommandBinding只能绑定到事件处理程序； 不是其他命令，因此我无法使用MVVM样式的数据绑定来附加它。 我可以在这里使用某些MVVM机制吗？还是我不得不为CommandBinding添加后台代码？

Answer 1

您可以使用本教程来绑定ApplicationCommands。
1.在视图模型中添加命令绑定收集属性：

public CommandBindingCollection CommandBindings { get; }

public YourViewModel()
{
//Create a command binding for the delete command
var deleteBinding = new CommandBinding(ApplicationCommands.Delete, DeleteExecuted, DeleteCanExecute);

//Register the binding to the class
CommandManager.RegisterClassCommandBinding(typeof(YourViewModel), DeleteBinding);

//Adds the binding to the CommandBindingCollection
CommandBindings.Add(deleteBinding);
}

2. 如教程中所述创建附加属性。

3. 然后在用户界面中绑定附加属性。