WPF DataTrigger将不会监视更改

我创建了一个自定义UserControl。它有一个自定义的依赖属性。样式具有使用该属性的数据触发器。当表单加载ExpectsFunction.get（）被调用两次。然后我将ExpectsFunction设置为true。如果我在setter中放置一个断点，我看到SetValue被正确调用，并且属性ExpectsFunction变为'true'。但是，DataTrigger似乎没有对这种变化做出反应。我是否需要实现一些额外的事件，或实现INotifyPropertyChanged并从DependencyProperty的回调中手动触发PropertyChanged？我以为DataTrigger将订阅的DependencyProperty，但它似乎并没有这样的情况：/WPF DataTrigger将不会监视更改

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}" /> 

...

谢谢！

来源

2013-10-12 A.T.

简单（浪费4小时后：/）...属性名称的字符串不得包含属性。

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

来源

2013-10-12 13:34:33

WPF DataTrigger将不会监视更改

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