MVVM示例程序

目录

一 定义可通知属性

二 定义前端并绑定

三 运行效果

---

一 定义可通知属性

 internal class MainViewModel : ObservableObject{/// <summary>/// 供前端的Command命令Binding调用/// </summary>public RelayCommand ShowCommand { get; set; }public MainViewModel(){ShowCommand = new RelayCommand(Show);}private string name;public string Name{get { return name; }set { name = value; OnPropertyChanged(); }}private string title;public string Title{get { return title; }set { title = value; OnPropertyChanged(); }}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);WeakReferenceMessenger.Default.Send<string, string>(Title, "Token1");}}

二 定义前端并绑定

<Window x:Class="ToolKitMVVMTest.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:ToolKitMVVMTest"mc:Ignorable="d"Title="MainWindow" Height="450" Width="800"><Grid><TextBox HorizontalAlignment="Left" Margin="145,52,0,0" TextWrapping="Wrap" Text="{Binding Name}" VerticalAlignment="Top" Width="517" Height="189"/><Button Content="Button" HorizontalAlignment="Left" Margin="245,294,0,0" VerticalAlignment="Top" Height="72" Width="278" Command="{Binding ShowCommand}"/></Grid></Window>

 /// <summary>/// Interaction logic for MainWindow.xaml/// </summary>public partial class MainWindow : Window{public MainWindow(){InitializeComponent();this.DataContext = new MainViewModel();WeakReferenceMessenger.Default.Register<string, string>(this, "Token1", (s, val) =>{MessageBox.Show(val);});}}

三 运行效果