Microsoft.Toolkit.Mvvm

 

using Microsoft.Toolkit.Mvvm.ComponentModel;
using Microsoft.Toolkit.Mvvm.Input;
using Microsoft.Toolkit.Mvvm.Messaging;
using System.ComponentModel;
//using System.Runtime.CompilerServices;
using System.Windows;


namespace wpf命令
{
    public class MainViewModel:ObservableObject
    {
        //绑定ui
       
        private string name;
        public string Name
        {
            get { return name; }
            
            set{ name = value; OnPropertyChanged(); }
        }
       
        //支持泛型
        //public RelaCommand ShowCommand {get;}
        public RelayCommand ShowCommand { get; }
        public MainViewModel()
        {
            Name = "Hello";
            ShowCommand = new RelayCommand (Show);
        }



        //UI分离
        //跟按钮建立关系
        public void Show(string content)
        {
            Name = "我点击了按钮";
            //我给Token1的地址发送一个string类型的的值content
            WeakReferenceMessenger.Default.Send(content,"Token1");
        }
    }
}

using Microsoft.Toolkit.Mvvm.Messaging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace wpf命令
{
    /// 

    /// Interaction logic for MainWindow.xaml
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            //上下文
            this.DataContext = new MainViewModel();
            //地址是Token1
            WeakReferenceMessenger.Default.Register(this, "Token1", (s,e) =>
            {
                MessageBox.Show(e);
            });
        }
        
    }
}