Silverlight Command的运用

1：写一个类继承ICommand接口

public class MyCommand : ICommand
    {

        private readonly Action<object> executeAction;
        private readonly Func<object, bool> canExecuteAction;
        public event EventHandler CanExecuteChanged;
        public MyCommand(Action<object> executeAction)
            : this(executeAction, null)
        {
        }
        public MyCommand(Action<object> executeAction,
            Func<object, bool> canExecuteAction)
        {
            this.executeAction = executeAction;
            this.canExecuteAction = canExecuteAction;
        }
        public bool CanExecute(object parameter)
        {
            if (canExecuteAction != null)
            {
                return canExecuteAction((object)parameter);
            }
            return true;
        }
        public void Execute(object parameter)
        {
            if (CanExecute(parameter))
            {
                executeAction((object)parameter);
            }
        }

    }

2：在ViewMode中定义一个Comand 返回一个自定义Command实例，传入方法

  public class MainPageViewMode
    {
        public ICommand ShowHello { get { return new MyCommand(showhello); } }


        private void showhello(object param)
        {
            MessageBox.Show("Hello!");
        }

    }

3：前台运用

 <Button x:Name="addxap" Content="CommandTest" Command="{Binding ShowHello}" />

这样，点击按钮的时候就会执行ViewMode中的方法了。