WPF Command 的使用

一、Command类的创建  >>  构造函数方法中传入了一个委托

public class MyCommand : ICommand
{
    public readonly Action _action;
    public MyCommand(Action action) { 
        this._action = action;
    }
    public event EventHandler CanExecuteChanged;

    public bool CanExecute(object parameter)
    {
        return true;
    }

    public void Execute(object parameter)
    {
        _action();
    }
}

二、command在viewmodel中的使用

public class MainViewModel
{
    public MyCommand myCommand { get; set; }
    public MainViewModel() {
        myCommand = new MyCommand(Show);
    }
    public void Show()
    {
        MessageBox.Show("你点击了我！");
    }

}

三、在页面控件button 中调用 

<Button Command="{Binding myCommand}">点击</Button>