WPF DataTrigger將不會監視更改

我創建了一個自定義UserControl。它有一個自定義的依賴屬性。樣式具有使用該屬性的數據觸發器。當表單加載ExpectsFunction.get（）被調用兩次。然後我將ExpectsFunction設置爲true。如果我在setter中放置一個斷點，我看到SetValue被正確調用，並且屬性ExpectsFunction變爲'true'。但是，DataTrigger似乎沒有對這種變化做出反應。我是否需要實現一些額外的事件，或實現INotifyPropertyChanged並從DependencyProperty的回調中手動觸發PropertyChanged？我以爲DataTrigger將訂閱的DependencyProperty，但它似乎並沒有這樣的情況：/WPF DataTrigger將不會監視更改

public partial class MatlabScriptSettings : UserControl 
{ 
    public static readonly DependencyProperty ExpectsFunctionProperty = 
     DependencyProperty.Register("ExpectsFunctionProperty", typeof(bool), typeof(MatlabScriptSettings), new PropertyMetadata(false)); 

    public bool ExpectsFunction 
    { 
     get 
     { 
      return (bool)GetValue(ExpectsFunctionProperty); 
     } 
     set 
     { 
      SetValue(ExpectsFunctionProperty, value); 
     } 
    } 
} 

<UserControl x:Class="PlatformManager.UI.Configuration.MatlabScriptSettings" 
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      mc:Ignorable="d" 
      d:DesignHeight="400" d:DesignWidth="350" 
      x:Name="_this"> 

    <UserControl.Resources> 
     <Style x:Key="ArgumentsStyle" TargetType="{x:Type TextBox}"> 
      <Style.Triggers> 
       <DataTrigger Binding="{Binding ElementName=_this, Path=ExpectsFunction}" Value="True"> 
        <Setter Property="IsReadOnly" Value="False" /> 
        <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlLightLightBrushKey}}" /> 
       </DataTrigger> 
       <DataTrigger Binding="{Binding ElementName=_this, Path=ExpectsFunction}" Value="False"> 
        <Setter Property="IsReadOnly" Value="True" /> 
        <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlLightBrushKey}}" /> 
       </DataTrigger> 
      </Style.Triggers> 
     </Style> 
    </UserControl.Resources> 

... 

<TextBox Name="ScriptArguments" Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" Margin="5,5,0,0" Text="{Binding Path=ScriptArguments}" Style="{StaticResource ResourceKey=ArgumentsStyle}" /> 

...

謝謝！

來源

2013-10-12 A.T.

簡單（浪費4小時後：/）...屬性名稱的字符串不得包含屬性。

public static readonly DependencyProperty ExpectsFunctionProperty = 
    DependencyProperty.Register("ExpectsFunction", typeof(bool), typeof(MatlabScriptSettings), new PropertyMetadata(false));

來源

2013-10-12 13:34:33

WPF DataTrigger將不會監視更改

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