使用Silverlight的反應框架和INotifyPropertyChanged

我是RX框架的新手。我玩弄它試圖更新Silverlight文本框更新屬性使用INotifyPropertyChanged。我的XAML看起來像這樣：使用Silverlight的反應框架和INotifyPropertyChanged

<Canvas x:Name="LayoutRoot" Background="White"> 
     <Border BorderThickness="2" CornerRadius="5" BorderBrush="Blue" Canvas.Left="12" Width="371"> 
      <TextBlock Height="135" HorizontalAlignment="Left" Margin="12,50,0,0" Name="textBlock1" 
         Text="" 
         VerticalAlignment="Top" Width="367" /> 
     </Border> 
     <Button Content="Post!" Height="23" HorizontalAlignment="Left" Margin="12,210,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> 
     <TextBox Height="41" 
       HorizontalAlignment="Left" 
       Margin="12,247,0,0" 
       Name="textBox1" 
       VerticalAlignment="Top" 
       Width="376" 
       /> 
     <sdk:Label Height="23" HorizontalAlignment="Left" Margin="12,12,0,0" Name="label1" VerticalAlignment="Top" Width="120" Content="Post Window" FontWeight="Bold" FontSize="12" Canvas.Left="14" Canvas.Top="0" /> 
    </Canvas>

在背後說我的代碼，我有：

public partial class MainPage : UserControl 
    { 
     Messanger messanger; 

     public MainPage() 
     { 
      InitializeComponent(); 

     } 

     void messanger_PropertyChanged(object sender, PropertyChangedEventArgs e) 
     { 
      var textBoxInput = from evt in Observable.FromEvent<PropertyChangedEventArgs>(messanger, "PropertyChanged") 
           select evt.EventArgs.PropertyName.Equals("PropertyName"); 

      textBoxInput.Subscribe(value => textBlock1.Text = value.ToString()); 
     } 

     private void button1_Click(object sender, RoutedEventArgs e) 
     { 
      messanger = new Messanger(); 

      messanger.PropertyChanged += new PropertyChangedEventHandler(messanger_PropertyChanged); 

      messanger.Message = textBox1.Text; 
     } 

    }

，我創建了另一個類來處理的屬性更改事件

public class Messanger : INotifyPropertyChanged 
    { 
     private string MessageValue; 

     public string Message 
     { 
      get { return MessageValue; } 
      set 
      { 
       MessageValue = value; 

       NotifyPropertyChanged("Message"); 
      } 
     } 
     public void NotifyPropertyChanged(string propertyName) 
     { 
      if (PropertyChanged != null) 
      { 
       PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
      } 
     } 
     public event PropertyChangedEventHandler PropertyChanged; 
    }

我的問題是，我沒有從文本框中的文本中獲得輸出。也讓我知道，如果我使用它不正確...

任何想法？提前致謝！

來源

2011-04-09 Mage

嘗試TextBlock的文本綁定到文本框的文本這樣

... 
<TextBlock Height="135" HorizontalAlignment="Left" Margin="12,50,0,0" Name="textBlock1" 
         Text="{Binding ElementName=textBox1,Path=Text}" 
         VerticalAlignment="Top" Width="367" /> 
... 
<TextBox Height="41" 
       HorizontalAlignment="Left" 
       Margin="12,247,0,0" 
       Name="textBox1" 
       VerticalAlignment="Top" 
       Width="376" 
       />

來源

2011-04-09 05:27:26

不會失去使用Rx框架和Observable的目的嗎？ – Mage 2011-04-09 05:39:38

我不這麼認爲，你應該做正確的綁定以便可視化正確的數據 – 2011-04-09 06:13:56

你正在做的只是將文本框綁定到文本塊。這很好，但不是我想要做的。我希望Oberserver將數據推送給我（意思是Textblock） – Mage 2011-04-09 17:36:24

如果您有興趣使用的Silverlight的反應框架，你可能想看看Reactive UI。

來源

2011-04-10 07:00:03

使用Silverlight的反應框架和INotifyPropertyChanged

回答

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