MVVM

Model:数据模型、View 界面、ViewModel 业务逻辑处理

项目结构

界面数据绑定

<Window x:Class="WpfApp1.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:WpfApp1"mc:Ignorable="d"Title="MainWindow" Height="350" Width="525"><Grid><Label Content="输入的值" HorizontalAlignment="Left" Margin="68,52,0,0" VerticalAlignment="Top" Height="35" Width="69"/><!--TextWrapping="Wrap" 内容是否换行--><TextBox Name="txtUserName" Text="{Binding UserName}" HorizontalAlignment="Left" Margin="142,52,0,242.667" TextWrapping="Wrap" Width="123"/><Button Content="SHOW" Click="Button_Click" HorizontalAlignment="Left" Margin="285,55,0,0" VerticalAlignment="Top" Width="78" Height="23"/><!--           控件数据的绑定--><Label Content="{Binding UserName}" HorizontalAlignment="Left" Margin="142,87,0,0" VerticalAlignment="Top"/></Grid>
</Window>

后台代码

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;
using WpfApp1.ViewModels;namespace WpfApp1
{/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>public partial class MainWindow : Window{public MainWindow(){InitializeComponent();this.Loaded += MainWindow_Loaded;}private UserViewModel _userViewModel;private void MainWindow_Loaded(object sender, RoutedEventArgs e){_userViewModel = new UserViewModel();//指定界面的数据对上下文对象，XML Binding 绑定值时使用this.DataContext = _userViewModel;_userViewModel.UserName = "cjhText";}private void Button_Click(object sender, RoutedEventArgs e){_userViewModel.UserName = txtUserName.Text;}}
}

UserViewModel

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace WpfApp1.ViewModels
{public class UserViewModel : INotifyPropertyChanged{public event PropertyChangedEventHandler PropertyChanged;private string _userName;public string UserName{set {_userName = value;//数据更新 通知界面绑定的地方更新数据PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("UserName"));}get {return _userName;}}//propfullprivate int _sex;public int Sex{get { return _sex; }set { _sex = value; }}}
}

END