WPF | 跟着视频敲代码8 | WPF框架（MvvMLight）

https://www.bilibili.com/video/BV1nY411a7T8?p=9

命令Command 

更改通知方法 RaisePropertyChanged

"WPF04.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WPF04"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    
        "Horizontal">
            "{Binding Name}" Height="20" Width="200">
            "{Binding ShowCommand}" Height="20" Width="60" Content="测试点击">
         
    

using System.Windows;

namespace WPF04
{
    /// 

    /// Interaction logic for MainWindow.xaml
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = new MainViewModel();
        }
    }
}

using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Command;
using System.Windows;

namespace WPF04
{
    public class MainViewModel : ViewModelBase
    {
        /// 

        /// 供前端的Command命令Binding调用
        /// 
        public RelayCommand ShowCommand { get; set; }
        public MainViewModel()
        {
            ShowCommand = new RelayCommand(Show);
        }
        private string name;
        public string Name
        {
            get { return name; }
            set { name = value; RaisePropertyChanged(); }
        }
        private string title;
        public string Title
        {
            get { return title; }
            set { title = value; RaisePropertyChanged(); }
        }

        public void Show()
        {
            Title = "你点击了按钮 this is Title";
            Name = "你点击了按钮  this is Name";
            MessageBox.Show(Name);
        }
    }
}

 另外也可使用消息通知

 using GalaSoft.MvvmLight.Messaging

 Messenger.Default.Register(this, "Token1", Show);

 Messenger.Default.Send(Title, "Token1");