WPF：向客户端发出某一属性值已更改的通知INotifyPropertyChanged接口

Person.cs

using System.ComponentModel;namespace _01_INotifyPropertyChanged{    class Person:INotifyPropertyChanged    {        private double height;        private double weight;        public double Height {            set            {                this.height = value;            }            get            {                return height;            }        }        public double Weight         {            set            {                this.weight = value;                if (PropertyChanged != null)                {                    PropertyChanged(this, new PropertyChangedEventArgs("Weight"));                }            }            get            {                return weight;            }        }        public event PropertyChangedEventHandler PropertyChanged;    }}

MainWindow.xaml

<Window x:Class="_01_INotifyPropertyChanged.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" WindowStartupLocation="CenterScreen" FontSize="14" Loaded="Window_Loaded">    <Grid>        <Grid>            <Grid.ColumnDefinitions>                <ColumnDefinition></ColumnDefinition>                <ColumnDefinition></ColumnDefinition>                <ColumnDefinition></ColumnDefinition>            </Grid.ColumnDefinitions>            <Grid.RowDefinitions>                <RowDefinition></RowDefinition>                <RowDefinition></RowDefinition>                <RowDefinition></RowDefinition>            </Grid.RowDefinitions>            <TextBlock Text="身高" VerticalAlignment="Center" HorizontalAlignment="Right"></TextBlock>            <TextBox Text="{Binding Height}" Name="txtHeight" Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Width="58"></TextBox>            <Button Name="btnHeightIncrease" Content="身高加1" Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Left" Click="btnHeightIncrease_Click"></Button>            <TextBlock Text="体重" Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Right"></TextBlock>            <TextBox Text="{Binding Weight}" Name="txtWeight" Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Width="58"></TextBox>            <Button Name="btnWeightIncrease" Content="体重加1" Grid.Row="1" Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Left" Click="btnWeightIncrease_Click"></Button>            <DataGrid Name="dgPerson" Grid.Row="2" Grid.ColumnSpan="3" BorderBrush="White" Background="White" CanUserAddRows="False"></DataGrid>        </Grid>    </Grid></Window>

MainWindow.xaml.cs

using System.Collections.Generic;using System.Windows;using System.Windows.Documents;namespace _01_INotifyPropertyChanged{    /// <summary>    /// MainWindow.xaml 的交互逻辑    /// </summary>    public partial class MainWindow : Window    {        Person person = new Person();        public MainWindow()        {            InitializeComponent();        }        private void Window_Loaded(object sender, RoutedEventArgs e)        {            List<Person> listPerson = new List<Person>();            person.Height = 175.3;            person.Weight = 66.7;            listPerson.Add(person);            txtHeight.DataContext = txtWeight.DataContext = person;            dgPerson.ItemsSource = listPerson;        }        private void btnHeightIncrease_Click(object sender, RoutedEventArgs e)        {            person.Height++;            MessageBox.Show(string.Format("身高现在是{0}，但dgPerson绑定的数据没有刷新。", person.Height));        }        private void btnWeightIncrease_Click(object sender, RoutedEventArgs e)        {            person.Weight++;            MessageBox.Show(string.Format("体重现在是{0}，dgPerson已刷新。", person.Weight));        }    }}