如何將Label.Background綁定到變量

我從代碼隱藏中的變量中獲取多個項目的狀態，並且想要在我的GUI中的每個選項卡上以圖形方式顯示這些項目的狀態。我將狀態顯示爲彩色標籤（3種不同的顏色代表3種不同的狀態）。我已經想出瞭如何強制背景用一堆代碼改變顏色，但我認爲使用數據觸發器會更好，但是我一直無法讓它工作。使用調試器，它逐步完成例程並正確更改值，但屏幕上的顏色不會改變。順便說一下，我一直在使用wpf和C＃大約6周。預先感謝您指出我的錯誤。如何將Label.Background綁定到變量

這裏是我的類：

class componentStatus : INotifyPropertyChanged 
{ 
    public event PropertyChangedEventHandler PropertyChanged = delegate { }; 

    private int _icc1status; 
    public int Icc1status 
    { 
     get 
     { 
      return this._icc1status; 
     } 

     set 
     { 
      if (value != this._icc1status) 
      { 
       this._icc1status = value; 
       NotifyPropertyChanged("Icc1status"); 
      } 
     } 
    } 

    private int _icc2status; 
    public int Icc2status 
    { 
     get 
     { 
      return this._icc2status; 
     } 

     set 
     { 
      if (value != this._icc2status) 
      { 
       this._icc2status = value; 
       NotifyPropertyChanged("Icc2status"); 
      } 
     } 
    } 

    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "") 
    { 
     if (PropertyChanged != null) 
     { 
      PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
     } 
    } 
}

這裏的XAML：

 <Style x:Key="Icc2Status" TargetType="{x:Type Label}"> 
     <Style.Triggers> 
      <DataTrigger Binding="{Binding Icc2status, UpdateSourceTrigger=PropertyChanged}" Value="2"> 
       <Setter Property="Background" Value="Red"/> 
      </DataTrigger> 
      <DataTrigger Binding="{Binding Icc2status, UpdateSourceTrigger=PropertyChanged}" Value="1"> 
       <Setter Property="Background" Value="Yellow"/> 
      </DataTrigger> 
      <DataTrigger Binding="{Binding Icc2status, UpdateSourceTrigger=PropertyChanged}" Value="0"> 
       <Setter Property="Background" Value="Green"/> 
      </DataTrigger> 
     </Style.Triggers> 
    </Style> 

    <Label x:Name="icc2statusLabel" Style="{DynamicResource Icc2Status}" Content="ICC 2" HorizontalContentAlignment="Center" HorizontalAlignment="Right" Margin="0,0,260,0" VerticalAlignment="Top" Width="45" Foreground="Black" BorderThickness="1" BorderBrush="Black"/>

而且我後面的代碼：

public partial class MainWindow : Window 
{ 

    componentStatus compStatus = new componentStatus(); 

    public static readonly DependencyProperty myComponentProperty = 
     DependencyProperty.Register("Icc2status", typeof(int), typeof(Label), new PropertyMetadata(null)); 

    //GUI for Invent Program 
    public MainWindow() 
    { 
     InitializeComponent(); 
     this.DataContext = this; 
    } 

    //This button is for test purposes only 
    private void test_Click(object sender, RoutedEventArgs e) 
    { 
     compStatus.Icc1status = 2; 
     compStatus.Icc2status = 1; 
    } 

    //Routine to force color change of the system state when it changes 
    //I think data triggers are probably a better option 
    private void component_PropertyChanged(object sender, PropertyChangedEventArgs e) 
    { 
     //Get the new component status 
     //if (compStatus.Icc1status == 0) icc1statusLabel.Background = new SolidColorBrush(Colors.Green); 
     //if (compStatus.Icc1status == 1) icc1statusLabel.Background = new SolidColorBrush(Colors.Yellow); 
     //if (compStatus.Icc1status == 2) icc1statusLabel.Background = new SolidColorBrush(Colors.Red); 
    } 
}

來源

2014-11-03 mkk

綁定路徑是相對於你的DataContext，所以更改DataContext從this到compStatus。此外，擺脫您的myComponentProperty，因爲它似乎沒有任何用途。

來源

2014-11-03 16:57:54

完美地工作。感謝您及時的回覆。我被困在這個3天。 – mkk 2014-11-03 17:58:24

DataContext不正確。它應該設置爲compStatus。

this.DataContext = compStatus;

來源

2014-11-03 17:51:38

如何將Label.Background綁定到變量

回答

相關問題