MVVM模式的简单案例

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Model类：

using System.ComponentModel;namespace MVVM.Model{    public class StudentModel : INotifyPropertyChanged    {        /// <summary>          /// 学号          /// </summary>          private int studentId;        public int StudentId        {            get            {                return studentId;            }            set            {                studentId = value;                NotifyPropertyChanged("StudentId");            }        }        /// <summary>          /// 姓名          /// </summary>          private string studentName;        public string StudentName        {            get            {                return studentName;            }            set            {                studentName = value;                NotifyPropertyChanged("StudentName");            }        }        /// <summary>          /// 年龄          /// </summary>          private int studentAge;        public int StudentAge        {            get            {                return studentAge;            }            set            {                studentAge = value;                NotifyPropertyChanged("StudentAge");            }        }        /// <summary>          /// Email          /// </summary>          private string studentEmail;        public string StudentEmail        {            get            {                return studentEmail;            }            set            {                studentEmail = value;                NotifyPropertyChanged("StudentEmail");            }        }        /// <summary>          /// 性别          /// </summary>          private string studentSex;        public string StudentSex        {            get            {                return studentSex;            }            set            {                studentSex = value;                NotifyPropertyChanged("StudentSex");            }        }        public event PropertyChangedEventHandler PropertyChanged;        public void NotifyPropertyChanged(string propertyName)        {            if (PropertyChanged != null)            {                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));            }        }    }}

ViewModel类：

using System;using System.Windows.Input;using MVVM.Model;namespace MVVM.ViewModel{    public class StudentViewModel    {        public DelegateCommand ShowCommand { get; set; }        public StudentModel Student { get; set; }        public StudentViewModel()        {            Student = new StudentModel();            ShowCommand = new DelegateCommand();            ShowCommand.ExecuteCommand = new Action<object>(ShowStudentData);        }        private void ShowStudentData(object obj)        {            Student.StudentId = 1;            Student.StudentName = "Mar";            Student.StudentAge = 20;            Student.StudentEmail = "[e-mail]";            Student.StudentSex = "male";        }    }    public class DelegateCommand : 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);            }            else            {                return true;            }        }        public void Execute(object parameter)        {            if (this.ExecuteCommand != null)            {                this.ExecuteCommand(parameter);            }        }        public void RaiseCanExecuteChanged()        {            if (CanExecuteChanged != null)            {                CanExecuteChanged(this, EventArgs.Empty);            }        }    }}

XMAL：

<Window x:Class="MVVM.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:MVVM"        mc:Ignorable="d"        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" HorizontalAlignment="Left" Margin="345,27,0,0" Name="buttonShow" VerticalAlignment="Top" Width="75" />    </Grid></Window>

XAML后台：

using MVVM.ViewModel;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 MVVM{    /// <summary>    /// MainWindow.xaml 的交互逻辑    /// </summary>    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();            this.DataContext = new StudentViewModel();        }    }}