PropertyChanged不適用於綁定

我有一個由屬性填充的文本框。當我點擊按鈕時，屬性值被改變，文本框內容也應該改變。然而我的財產改變事件不起作用。我已經在這裏和其他來源尋找解決方案。我沒有找到任何可能的幫助。有人能幫我嗎？PropertyChanged不適用於綁定

代碼：

using System.ComponentModel; 

namespace TestWPF { 
    public class Class1 : INotifyPropertyChanged { 

     public event PropertyChangedEventHandler PropertyChanged; 
     protected void OnPropertyChanged(string name) { 
      if (PropertyChanged != null) { 
       PropertyChanged(this, new PropertyChangedEventArgs(name)); 
      } 
     } 

     private string test = "test"; 
     public string TestProperty { 
      get { return test; } 
      set { 
       if (value != test) 
        test = value; 
       OnPropertyChanged("TestProperty"); 
      } 
     } 
    } 
} 

<Window.DataContext> 
<local:Class1/> 
</Window.DataContext> 
<Grid> 
    <TextBox Text="{Binding Path=TestProperty, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" x:Name="textBox" HorizontalAlignment="Center" Margin="0,-100,0,0" Height="69" TextWrapping="Wrap" VerticalAlignment="Center" Width="255"/> 
    <Button x:Name="button" Content="Button" HorizontalAlignment="Center" Margin="0,0,0,0" VerticalAlignment="Center" Width="75" Click="button_Click"/> 
</Grid>

編輯：

 private void button_Click(object sender, RoutedEventArgs e) { 
     cs1.TestProperty = "Test button"; 
    }

來源

2016-04-04 conan.ak

'cs1'（我想它是'Class1'的一個實例）！='Window.DataContext';窗口綁定到另一個上下文 – ASh

感謝您的幫助 –

private void button_Click(object sender, RoutedEventArgs e) 
{ 
     var dc = (sender as System.Windows.Controls.Button).DataContext; 
     var cs1 = dc as Class1; 
     cs1.TestProperty = "Test button"; 
}

或

public partial class MainWindow : Window 
{ 

    Class1 cs1; 

    public MainWindow() 
    { 
     InitializeComponent(); 
     DataContext = cs1 = new Class1(); 
    } 

    private void button_Click(object sender, RoutedEventArgs e) 
    { 
     cs1.TestProperty = "Test button"; 
    } 
}

而且沒有：

<Window.DataContext> 
    <local:Class1/> 
</Window.DataContext>

來源

2016-04-04 09:53:23

PropertyChanged不適用於綁定

回答

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