WPF組合框禁用背景顏色

當IsEnabled設置爲False時，WPF組合框的背景顏色似乎不可覆蓋。設置Foreground屬性確實工作正常。即使使用snoop並設置背景也不會更改禁用狀態下的組合框背景顏色。這是我使用的樣式（基於Blend的模板副本）。有任何想法嗎？WPF組合框禁用背景顏色

<!-- COMBO BOX--> 
    <Style x:Key="ComboBoxFocusVisual"> 
     <Setter Property="Control.Template"> 
      <Setter.Value> 
       <ControlTemplate> 
        <Rectangle Margin="4,4,21,4" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/> 
       </ControlTemplate> 
      </Setter.Value> 
     </Setter> 
    </Style> 
    <LinearGradientBrush x:Key="ButtonNormalBackground" EndPoint="0,1" StartPoint="0,0"> 
     <GradientStop Color="#F3F3F3" Offset="0"/> 
     <GradientStop Color="#EBEBEB" Offset="0.5"/> 
     <GradientStop Color="#DDDDDD" Offset="0.5"/> 
     <GradientStop Color="#CDCDCD" Offset="1"/> 
    </LinearGradientBrush> 
    <SolidColorBrush x:Key="ButtonNormalBorder" Color="#FF707070"/> 
    <Geometry x:Key="DownArrowGeometry">M 0 0 L 3.5 4 L 7 0 Z</Geometry> 
    <Style x:Key="ComboBoxReadonlyToggleButton" TargetType="{x:Type ToggleButton}"> 
     <Setter Property="OverridesDefaultStyle" Value="true"/> 
     <Setter Property="IsTabStop" Value="false"/> 
     <Setter Property="Focusable" Value="false"/> 
     <Setter Property="ClickMode" Value="Press"/> 
     <Setter Property="Template"> 
      <Setter.Value> 
       <ControlTemplate TargetType="{x:Type ToggleButton}"> 
        <Microsoft_Windows_Themes:ButtonChrome x:Name="Chrome" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" SnapsToDevicePixels="true"> 
         <Grid HorizontalAlignment="Right" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"> 
          <Path x:Name="Arrow" Data="{StaticResource DownArrowGeometry}" Fill="Black" HorizontalAlignment="Center" Margin="3,1,0,0" VerticalAlignment="Center"/> 
         </Grid> 
        </Microsoft_Windows_Themes:ButtonChrome> 
        <ControlTemplate.Triggers> 
         <Trigger Property="IsChecked" Value="true"> 
          <Setter Property="RenderPressed" TargetName="Chrome" Value="true"/> 
         </Trigger> 
         <!-- This controls the down arrow in the disabled state--> 
         <Trigger Property="IsEnabled" Value="false"> 
          <Setter Property="Visibility" TargetName="Arrow" Value="Collapsed"/> 
         </Trigger> 
        </ControlTemplate.Triggers> 
       </ControlTemplate> 
      </Setter.Value> 
     </Setter> 
    </Style> 
    <LinearGradientBrush x:Key="TextBoxBorder" EndPoint="0,20" MappingMode="Absolute" StartPoint="0,0"> 
     <GradientStop Color="#ABADB3" Offset="0.05"/> 
     <GradientStop Color="#E2E3EA" Offset="0.07"/> 
     <GradientStop Color="#E3E9EF" Offset="1"/> 
    </LinearGradientBrush> 
    <Style x:Key="ComboBoxEditableTextBox" TargetType="{x:Type TextBox}"> 
     <Setter Property="OverridesDefaultStyle" Value="true"/> 
     <Setter Property="AllowDrop" Value="true"/> 
     <Setter Property="MinWidth" Value="0"/> 
     <Setter Property="MinHeight" Value="0"/> 
     <Setter Property="FocusVisualStyle" Value="{x:Null}"/> 
     <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/> 
     <Setter Property="Stylus.IsFlicksEnabled" Value="False"/> 
     <Setter Property="Template"> 
      <Setter.Value> 
       <ControlTemplate TargetType="{x:Type TextBox}"> 
        <ScrollViewer x:Name="PART_ContentHost" Background="Transparent" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"/> 
       </ControlTemplate> 
      </Setter.Value> 
     </Setter> 
    </Style> 
    <Style x:Key="ComboBoxToggleButton" TargetType="{x:Type ToggleButton}"> 
     <Setter Property="OverridesDefaultStyle" Value="true"/> 
     <Setter Property="IsTabStop" Value="false"/> 
     <Setter Property="Focusable" Value="false"/> 
     <Setter Property="ClickMode" Value="Press"/> 
     <Setter Property="Template"> 
      <Setter.Value> 
       <ControlTemplate TargetType="{x:Type ToggleButton}"> 
        <Microsoft_Windows_Themes:ButtonChrome x:Name="Chrome" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" RoundCorners="false" SnapsToDevicePixels="true" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"> 
         <Path x:Name="Arrow" Data="{StaticResource DownArrowGeometry}" Fill="Black" HorizontalAlignment="Center" Margin="0,1,0,0" VerticalAlignment="Center"/> 
        </Microsoft_Windows_Themes:ButtonChrome> 
        <ControlTemplate.Triggers> 
         <Trigger Property="IsChecked" Value="true"> 
          <Setter Property="RenderPressed" TargetName="Chrome" Value="true"/> 
         </Trigger> 
         <Trigger Property="IsEnabled" Value="false"> 
          <Setter Property="Fill" TargetName="Arrow" Value="#AFAFAF"/> 
         </Trigger> 
        </ControlTemplate.Triggers> 
       </ControlTemplate> 
      </Setter.Value> 
     </Setter> 
    </Style> 
    <ControlTemplate x:Key="ComboBoxEditableTemplate" TargetType="{x:Type ComboBox}"> 
     <Grid x:Name="Placement" SnapsToDevicePixels="true"> 
      <Grid.ColumnDefinitions> 
       <ColumnDefinition Width="*"/> 
       <ColumnDefinition Width="Auto"/> 
      </Grid.ColumnDefinitions> 
      <Popup x:Name="PART_Popup" AllowsTransparency="true" Grid.ColumnSpan="2" IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom"> 
       <Microsoft_Windows_Themes:SystemDropShadowChrome x:Name="Shdw" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding ActualWidth, ElementName=Placement}"> 
        <Border x:Name="DropDownBorder" BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}" BorderThickness="1" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"> 
         <ScrollViewer x:Name="DropDownScrollViewer"> 
          <Grid RenderOptions.ClearTypeHint="Enabled"> 
           <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0"> 
            <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=DropDownBorder}" Height="{Binding ActualHeight, ElementName=DropDownBorder}" Width="{Binding ActualWidth, ElementName=DropDownBorder}"/> 
           </Canvas> 
           <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> 
          </Grid> 
         </ScrollViewer> 
        </Border> 
       </Microsoft_Windows_Themes:SystemDropShadowChrome> 
      </Popup> 
      <Microsoft_Windows_Themes:ListBoxChrome x:Name="Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderFocused="{TemplateBinding IsKeyboardFocusWithin}"/> 
      <TextBox x:Name="PART_EditableTextBox" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsReadOnly="{Binding IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}" Margin="{TemplateBinding Padding}" Style="{StaticResource ComboBoxEditableTextBox}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/> 
      <ToggleButton Grid.Column="1" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ComboBoxToggleButton}"/> 
     </Grid> 
     <ControlTemplate.Triggers> 
      <Trigger Property="IsKeyboardFocusWithin" Value="true"> 
       <Setter Property="Foreground" Value="Black"/> 
      </Trigger> 
      <Trigger Property="IsDropDownOpen" Value="true"> 
       <Setter Property="RenderFocused" TargetName="Border" Value="true"/> 
      </Trigger> 
      <Trigger Property="HasItems" Value="false"> 
       <Setter Property="Height" TargetName="DropDownBorder" Value="95"/> 
      </Trigger> 
      <Trigger Property="IsEnabled" Value="false"> 
       <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/> 
       <Setter Property="Background" Value="#FFF4F4F4"/> 
      </Trigger> 
      <Trigger Property="IsGrouping" Value="true"> 
       <Setter Property="ScrollViewer.CanContentScroll" Value="false"/> 
      </Trigger> 
      <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="true"> 
       <Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/> 
       <Setter Property="Color" TargetName="Shdw" Value="#71000000"/> 
      </Trigger> 
      <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false"> 
       <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/> 
       <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/> 
      </Trigger> 
     </ControlTemplate.Triggers> 
    </ControlTemplate> 
    <Style x:Key="ComboBoxStyle1" TargetType="{x:Type ComboBox}"> 
     <Setter Property="FocusVisualStyle" Value="{StaticResource ComboBoxFocusVisual}"/> 
     <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/> 
     <Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/> 
     <Setter Property="BorderBrush" Value="{StaticResource ButtonNormalBorder}"/> 
     <Setter Property="BorderThickness" Value="1"/> 
     <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/> 
     <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/> 
     <Setter Property="Padding" Value="4,3"/> 
     <Setter Property="ScrollViewer.CanContentScroll" Value="true"/> 
     <Setter Property="ScrollViewer.PanningMode" Value="Both"/> 
     <Setter Property="Stylus.IsFlicksEnabled" Value="False"/> 
     <Setter Property="Template"> 
      <Setter.Value> 
       <ControlTemplate TargetType="{x:Type ComboBox}"> 
        <Grid x:Name="MainGrid" SnapsToDevicePixels="true"> 
         <Grid.ColumnDefinitions> 
          <ColumnDefinition Width="*"/> 
          <ColumnDefinition MinWidth="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}" Width="0"/> 
         </Grid.ColumnDefinitions> 
         <Popup x:Name="PART_Popup" AllowsTransparency="true" Grid.ColumnSpan="2" IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom"> 
          <Microsoft_Windows_Themes:SystemDropShadowChrome x:Name="Shdw" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding ActualWidth, ElementName=MainGrid}"> 
           <Border x:Name="DropDownBorder" BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}" BorderThickness="1" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"> 
            <ScrollViewer x:Name="DropDownScrollViewer"> 
             <Grid RenderOptions.ClearTypeHint="Enabled"> 
              <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0"> 
               <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=DropDownBorder}" Height="{Binding ActualHeight, ElementName=DropDownBorder}" Width="{Binding ActualWidth, ElementName=DropDownBorder}"/> 
              </Canvas> 
              <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> 
             </Grid> 
            </ScrollViewer> 
           </Border> 
          </Microsoft_Windows_Themes:SystemDropShadowChrome> 
         </Popup> 
         <ToggleButton BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ComboBoxReadonlyToggleButton}"/> 
         <ContentPresenter ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}" Content="{TemplateBinding SelectionBoxItem}" ContentStringFormat="{TemplateBinding SelectionBoxItemStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" IsHitTestVisible="false" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> 
        </Grid> 
        <ControlTemplate.Triggers> 
         <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="true"> 
          <Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/> 
          <Setter Property="Color" TargetName="Shdw" Value="#71000000"/> 
         </Trigger> 
         <Trigger Property="HasItems" Value="false"> 
          <Setter Property="Height" TargetName="DropDownBorder" Value="95"/> 
         </Trigger> 
         <Trigger Property="IsEnabled" Value="false"> 
          <!-- Text color for disabled state--> 
          <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/> 
          <!-- Backround not working, something must be overriding it 
          <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/> 
          --> 
         </Trigger> 
         <Trigger Property="IsGrouping" Value="true"> 
          <Setter Property="ScrollViewer.CanContentScroll" Value="false"/> 
         </Trigger> 
         <Trigger Property="ScrollViewer.CanContentScroll" SourceName="DropDownScrollViewer" Value="false"> 
          <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/> 
          <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/> 
         </Trigger> 
        </ControlTemplate.Triggers> 
       </ControlTemplate> 
      </Setter.Value> 
     </Setter> 
     <Style.Triggers> 
      <Trigger Property="IsEditable" Value="true"> 
       <Setter Property="BorderBrush" Value="{StaticResource TextBoxBorder}"/> 
       <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/> 
       <Setter Property="IsTabStop" Value="false"/> 
       <Setter Property="Padding" Value="3"/> 
       <Setter Property="Template" Value="{StaticResource ComboBoxEditableTemplate}"/> 
      </Trigger> 
     </Style.Triggers> 
    </Style>

來源

2011-03-30 Adam

我已經留在[Microsoft Connect站點]反饋（https://connect.microsoft.com/WPF/feedback/details/654866/cannot-style-combobox-background-color- when-isenabled-is-false＃details）對於任何未來的讀者 – Adam 2011-03-30 19:16:02

這不是一個完整的答案，但我認爲它顯示了爲什麼發生這種情況的原因：http://stackoverflow.com/questions/4424699/overriding-按鈕背景中，WPF的上航空。 ComboBox在其模板中使用ToggleButton，而ToggleButton反過來使用ButtonChrome，這是鏈接中解決的問題。 – skybluecodeflier 2012-04-09 01:09:48

取決於「不可覆蓋」的含義。這觸發模板：

<Trigger Property="IsEnabled" Value="false"> 
    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/> 
    <Setter Property="Background" Value="#FFF4F4F4"/> 
</Trigger>

是什麼是設置背景。因此，您必須重寫模板以進行自定義 - 控件本身沒有用於設置禁用背景的屬性，並且沒有資源查找，因此您無法在其中進行更改。

來源

2011-03-30 16:59:38

我試過改變它，它沒有效果。如果你不相信我，試試看。或者我不正確地理解你？ – Adam 2011-03-30 17:03:08

Adam是正確的，如果你改變了setter中的Background值，沒有明顯的區別。 – 2011-03-30 17:51:03

有幾個IsEnabled觸發器（我可能複製了錯誤的）。你嘗試了正確的嗎？ – 2011-03-30 20:47:43

來源

2011-03-30 20:27:52 publicgk

WPF組合框禁用背景顏色

回答

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