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

Person.cs

 

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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

 

 

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<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

 

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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));         }     } } </person></person>