WPF Command命令模式

     //定义接口
     public interface IView
     {
         bool IsChanged { get; set; }

         void SetBinding();
         void Clear();
     }

     //定义命令
     public class ClearCommand : ICommand
     {
         public event EventHandler CanExecuteChanged;

         public bool CanExecute(object parameter)
         {
             throw new NotImplementedException();
         }

         public void Execute(object parameter)
         {
             IView view = parameter as IView;
             if (view != null)
             {
                 view.Clear();
             }
         }
     }

     //自定义 命令源
     public class MyCommandSource : UserControl, ICommandSource
     {
         public ICommand Command
         {
             get; set;
         }

         public object CommandParameter
         {
             get; set;
         }

         public IInputElement CommandTarget
         {
             get; set;
         }

         //组件的连带执行命令， 可自定义
         protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
         {
             base.OnMouseLeftButtonDown(e);
             //命令作用在目标上
             if (this.CommandTarget != null)
             {
                 this.Command.Execute(this.CommandTarget);
             }
         }
     }

     /// <summary>
     /// UCView.xaml 的交互逻辑
     /// </summary>
     public partial class UCView : UserControl,IView
     {
         public UCView()
         {
             InitializeComponent();
         }

         public bool IsChanged
         {
             get; set;
         }

         public void Clear()
         {
             this.textBox1.Clear();
             this.textBox2.Clear();
         }

         public void SetBinding()
         {
             throw new NotImplementedException();
         }
     }

 <Window>
     <Grid>
         <StackPanel>
             <local:MyCommandSource x:Name="srcClear">
                 <!--添加命令源 内容控件-->
                 <TextBlock Text="></TextBlock>
             </local:MyCommandSource>
             <local:UCView x:Name="ucView"></local:UCView>
         </StackPanel>
     </Grid>
 </Window>    

         private void Window_Loaded(object sender, RoutedEventArgs e)
         {
             //创建命令
             ClearCommand clearcmd = new ClearCommand();
             //命令源设置命令
             srcClear.Command = clearcmd;
             //命令源 设置 目标
             srcClear.CommandTarget = ucView;
         }

同名的命令用 参数来区分