项目结构如下:
<Window x:Class="MVVMDemo.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Grid> <Label Content="学号" Height="28" HorizontalAlignment="Left" Margin="54,23,0,0" Name="labelStudentId" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentId}" IsReadOnly="True" Height="23" HorizontalAlignment="Right" Margin="0,27,289,0" Name="textBoxStudentId" VerticalAlignment="Top" Width="120" /> <Label Content="姓名" Height="28" HorizontalAlignment="Left" Margin="54,61,0,0" Name="labelStudentName" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentName}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,65,0,0" Name="textBoxStudentName" VerticalAlignment="Top" Width="120" /> <Label Content="年龄" Height="28" HorizontalAlignment="Left" Margin="54,94,0,0" Name="labelStudentAge" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentAge}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,99,0,0" Name="textBoxStudentAge" VerticalAlignment="Top" Width="120" /> <Label Content="Email" Height="28" HorizontalAlignment="Left" Margin="50,138,0,0" Name="labelStudentEmail" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentEmail}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,141,0,0" Name="textBoxStudentEmail" VerticalAlignment="Top" Width="120" /> <Label Content="性别" Height="28" HorizontalAlignment="Left" Margin="57,176,0,0" Name="labelStudentSex" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentSex}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,180,0,0" Name="textBoxStudentSex" VerticalAlignment="Top" Width="120" /> <Button Command="{Binding ShowCommand}" Content="显示" Height="23" Margin="266,28,162,260" Name="buttonShow" Width="75" /> <Button Command="{Binding ResetCommand}" Content="重置" Height="23" HorizontalAlignment="Left" Margin="266,83,0,0" Name="button1" VerticalAlignment="Top" Width="75" /> </Grid> </Window> <!-- MVVM,可以很好的配合WPF的数据绑定机制来实现UI与逻辑代码的分离, MVVM中的View表示界面,负责页面显示,ViewModel负责逻辑处理,包括 准备绑定的数据和命令,ViewModel通过View的DataContext属性绑定至View, Model为业务模型,供ViewModel使用 --> <!-- ICommand接口中的Execute()方法用于命令的执行,CanExecute()方法用于指示当前命令 在目标元素上是否可用,当这种可用性发生改变时便会触发接口中的CanExecuteChanged事件。 我们可以将实现了ICommand接口的命令DelegateCommand赋值给Button(命令源)的Command 属性(只有实现了ICommandSource接口的元素才拥有该属性),这样Button便与命令进行了绑定。 -->
using System.ComponentModel; namespace MVVMDemo.Model { public class StudentModel : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; public void OnPropertyChanged(string propertyName) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } /// <summary> /// 学号 /// </summary> private int studentId; public int StudentId { get { return studentId; } set { studentId = value; OnPropertyChanged("StudentId"); } } /// <summary> /// 姓名 /// </summary> private string studentName; public string StudentName { get { return studentName; } set { studentName = value; OnPropertyChanged("StudentName"); } } /// <summary> /// 年龄 /// </summary> private int studentAge; public int StudentAge { get { return studentAge; } set { studentAge = value; OnPropertyChanged("StudentAge"); } } /// <summary> /// Email /// </summary> private string studentEmail; public string StudentEmail { get { return studentEmail; } set { studentEmail = value; OnPropertyChanged("StudentEmail"); } } /// <summary> /// 性别 /// </summary> private string studentSex; public string StudentSex { get { return studentSex; } set { studentSex = value; OnPropertyChanged("StudentSex"); } } } } using System; using System.Windows.Input; namespace MVVMDemo.Helper { public class DelegateCommandHelper : ICommand { public Action<object> ExecuteCommand = null; public Func<object, bool> CanExecuteCommand = null; public event EventHandler CanExecuteChanged; public bool CanExecute(object parameter) { if (CanExecuteCommand != null) { return this.CanExecuteCommand(parameter); } return true; } public void Execute(object parameter) { if (this.ExecuteCommand != null) this.ExecuteCommand(parameter); } public void RaiseCanExecuteChanged() { if (CanExecuteChanged != null) CanExecuteChanged(this, EventArgs.Empty); } } } using System; using MVVMDemo.Helper; using MVVMDemo.Model; namespace MVVMDemo.ViewModel { public class StudentViewModel { //显示信息 public DelegateCommandHelper ShowCommand { get; set; } //重置信息 public DelegateCommandHelper ResetCommand { get; set; } public StudentModel Student { get; set; } public StudentViewModel() { Student = new StudentModel(); ShowCommand = new DelegateCommandHelper(); ResetCommand = new DelegateCommandHelper(); ShowCommand.ExecuteCommand = new Action<object>(ShowStudentData); ResetCommand.ExecuteCommand = new Action<object>(ResetStudentData); } /// <summary> /// 显示内容 /// </summary> /// <param name="obj"></param> private void ShowStudentData(object obj) { Student.StudentId = 1; Student.StudentName = "令狐冲"; Student.StudentAge = 18; Student.StudentEmail = "linghuchong@163.com"; Student.StudentSex = "大帅哥"; } /// <summary> /// 重置内容 /// </summary> /// <param name="obj"></param> private void ResetStudentData(object obj) { Student.StudentId = 0; Student.StudentName ="重置"; Student.StudentAge = 0; Student.StudentEmail = "重置"; Student.StudentSex = "重置"; } } } using System.Windows; using MVVMDemo.ViewModel; namespace MVVMDemo { /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); this.DataContext = new StudentViewModel(); } } }
方式二:
目录结构如下:
using Microsoft.Practices.Prism.ViewModel; namespace MVVM_PrismDemo2.Models { public class StudentModel : NotificationObject { private string studentId; public string StudentId { get { return studentId; } set { studentId = value; RaisePropertyChanged("StudentId"); } } private string studentName; public string StudentName { get { return studentName; } set { studentName = value; RaisePropertyChanged("StudentName"); } } private string studentAge; public string StudentAge { get { return studentAge; } set { studentAge = value; RaisePropertyChanged("StudentAge"); } } private string studentEmail; public string StudentEmail { get { return studentEmail; } set { studentEmail = value; RaisePropertyChanged("StudentEmail"); } } private string studentSex; public string StudentSex { get { return studentSex; } set { studentSex = value; RaisePropertyChanged("StudentSex"); } } } } using System; using Microsoft.Practices.Prism.Commands; using Microsoft.Practices.Prism.ViewModel; using MVVM_PrismDemo2.Models; namespace MVVM_PrismDemo2.ViewModels { class StudentViewModel :NotificationObject { /// <summary> /// 定义命令属性 /// </summary> public DelegateCommand DisplayDataCommand { get; set; } public DelegateCommand ResetDataCommand { get; set; } private StudentModel student; public StudentModel Student { get { return student; } set { student = value; } } public StudentViewModel() { Student = new StudentModel(); DisplayData(); //初始化命令属性 DisplayDataCommand = new DelegateCommand(new Action(DisplayData)); ResetDataCommand = new DelegateCommand(new Action(ResetData)); } private void DisplayData() { Student.StudentId = "1"; Student.StudentName = "令狐冲"; Student.StudentAge = "18"; Student.StudentEmail = "linghuchong@163.com"; Student.StudentSex = "大帅哥"; } private void ResetData() { Student.StudentId = "0"; Student.StudentName = "重置"; Student.StudentAge = "0"; Student.StudentEmail = "重置"; Student.StudentSex = "重置"; } } }
<Window x:Class="MVVM_PrismDemo2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Grid> <Label Content="学号" Height="28" HorizontalAlignment="Left" Margin="54,23,0,0" Name="labelStudentId" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentId, Mode=TwoWay}" IsReadOnly="True" Height="23" HorizontalAlignment="Right" Margin="0,27,289,0" Name="textBoxStudentId" VerticalAlignment="Top" Width="120" /> <Label Content="姓名" Height="28" HorizontalAlignment="Left" Margin="54,61,0,0" Name="labelStudentName" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentName, Mode=TwoWay}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,65,0,0" Name="textBoxStudentName" VerticalAlignment="Top" Width="120" /> <Label Content="年龄" Height="28" HorizontalAlignment="Left" Margin="54,94,0,0" Name="labelStudentAge" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentAge, Mode=TwoWay}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,99,0,0" Name="textBoxStudentAge" VerticalAlignment="Top" Width="120" /> <Label Content="Email" Height="28" HorizontalAlignment="Left" Margin="50,138,0,0" Name="labelStudentEmail" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentEmail, Mode=TwoWay}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,141,0,0" Name="textBoxStudentEmail" VerticalAlignment="Top" Width="120" /> <Label Content="性别" Height="28" HorizontalAlignment="Left" Margin="57,176,0,0" Name="labelStudentSex" VerticalAlignment="Top" /> <TextBox Text="{Binding Student.StudentSex, Mode=TwoWay}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,180,0,0" Name="textBoxStudentSex" VerticalAlignment="Top" Width="120" /> <Button Command="{Binding DisplayDataCommand}" Content="显示" Height="23" Margin="266,28,162,260" Name="buttonShow" Width="75" /> <Button Command="{Binding ResetDataCommand}" Content="重置" Height="23" HorizontalAlignment="Left" Margin="266,83,0,0" Name="button1" VerticalAlignment="Top" Width="75" /> </Grid> </Window>
using System.Windows; using MVVM_PrismDemo2.ViewModels; namespace MVVM_PrismDemo2 { /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); this.DataContext = new StudentViewModel(); } } }
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