WPF —— MVVM command如何传递参数

点击按钮把窗体关闭 把页面的控件传递到自定义指令的函数中

FindAncestor 找到该组件的祖先元素

AncestorType={x:Type Window} 祖先元素类型为window
CommandParameter 自定义指令传递参数

自定义指令

public class MyCommand : ICommand
{
    public event EventHandler CanExecuteChanged;

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

    public void Execute(object p)
    {
        var window = p as Window;
        if (window != null)
        {
            window.Close();
        }
    }
}

public MainWindow()

{

InitializeComponent();

M1 = new MyCommand();

this.DataContext = this;

//把指令封装公共类里面

//M1 = new CMD();

//this.DataContext = this;

}

public MyCommand M1 { get;set; }

//public CMD M1 { get; set; } 把指令封装公共类里面