WPF 为什么指定的背景不能覆盖样式触发器中的setter值？

发布于 2024-09-09 01:09:15 字数 2247 浏览 4 评论 0原文

我有一个 TextBox 的 Style ，如下所示：

<Style x:Key="TextBox_Standard" TargetType="{x:Type TextBoxBase}" >
    <Setter Property="Control.FontFamily" Value="/#Calibri" />
    <Setter Property="Control.FontSize" Value="12" />
    <Setter Property="Control.Margin" Value="2" />
    <Setter Property="Control.Height" Value="21" />
    <Setter Property="Control.VerticalAlignment" Value="Center" />
    <Setter Property="SnapsToDevicePixels" Value="True"/>
    <Setter Property="UndoLimit" Value="0"/>
    <Setter Property="Template">
        <Setter.Value>
          <ControlTemplate TargetType="{x:Type TextBoxBase}">
            <Border 
              Name="Border"
              CornerRadius="1" 
              Padding="1"
              Background="{StaticResource WindowBackgroundBrush}"
              BorderBrush="{StaticResource SolidBorderBrush}"
              BorderThickness="1" >
              <ScrollViewer Margin="0" x:Name="PART_ContentHost" />
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                    <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                    <Setter Property="Cursor" Value="Arrow"/>
                </Trigger>
                <Trigger Property="IsReadOnly" Value="True">
                    <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                    <Setter Property="Focusable" Value="False"/>
                    <Setter Property="Cursor" Value="Arrow"/>
                </Trigger>
            </ControlTemplate.Triggers>
          </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

它是为了确保不可编辑时前景色为黑色，背景色为灰色。

但显然现在需要在不可编辑时以编程方式更改背景，所以我尝试了这样的

操作： txtBox.Background = Brushes.Yellow; ，

但发生的情况是可编辑时它仍然具有白色背景不可编辑时为灰色背景。

我哪里做错了？

原文

I have a Style for a TextBox like this:

<Style x:Key="TextBox_Standard" TargetType="{x:Type TextBoxBase}" >
    <Setter Property="Control.FontFamily" Value="/#Calibri" />
    <Setter Property="Control.FontSize" Value="12" />
    <Setter Property="Control.Margin" Value="2" />
    <Setter Property="Control.Height" Value="21" />
    <Setter Property="Control.VerticalAlignment" Value="Center" />
    <Setter Property="SnapsToDevicePixels" Value="True"/>
    <Setter Property="UndoLimit" Value="0"/>
    <Setter Property="Template">
        <Setter.Value>
          <ControlTemplate TargetType="{x:Type TextBoxBase}">
            <Border 
              Name="Border"
              CornerRadius="1" 
              Padding="1"
              Background="{StaticResource WindowBackgroundBrush}"
              BorderBrush="{StaticResource SolidBorderBrush}"
              BorderThickness="1" >
              <ScrollViewer Margin="0" x:Name="PART_ContentHost" />
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                    <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                    <Setter Property="Cursor" Value="Arrow"/>
                </Trigger>
                <Trigger Property="IsReadOnly" Value="True">
                    <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                    <Setter Property="Focusable" Value="False"/>
                    <Setter Property="Cursor" Value="Arrow"/>
                </Trigger>
            </ControlTemplate.Triggers>
          </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

It was made to make sure the foreground color to be black and background color to be gray when it's not editable.

but apparently now there's a requirement to change the background programmatically when it's not editable, so I tried it like this:

txtBox.Background = Brushes.Yellow;

but what happens is it still have a white background when editable and gray background when not editable.

Where did I go wrong?

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她比我温柔 2024-09-16 01:09:15

试试这个

   <Style x:Key="TextBox_Standard" TargetType="{x:Type TextBoxBase}" >
        <Setter Property="Control.FontFamily" Value="/#Calibri" />
        <Setter Property="Control.FontSize" Value="12" />
        <Setter Property="Control.Margin" Value="2" />
        <Setter Property="Control.Height" Value="21" />
        <Setter Property="Control.VerticalAlignment" Value="Center" />
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Background" Value="{StaticResource WindowBackgroundBrush}"></Setter>
        <Setter Property="UndoLimit" Value="0"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TextBoxBase}">
                    <Border  
          Name="Border" 
          CornerRadius="1"  
          Padding="1" 
          Background="{TemplateBinding Background}" 
          BorderBrush="{StaticResource SolidBorderBrush}" 
          BorderThickness="1" >
                        <ScrollViewer Margin="0" x:Name="PART_ContentHost" />
                    </Border>
                    <ControlTemplate.Triggers>

                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                            <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                            <Setter Property="Cursor" Value="Arrow"/>
                        </Trigger>
                        <Trigger Property="IsReadOnly" Value="True">
                            <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                            <Setter Property="Focusable" Value="False"/>
                            <Setter Property="Cursor" Value="Arrow"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

just try with this

   <Style x:Key="TextBox_Standard" TargetType="{x:Type TextBoxBase}" >
        <Setter Property="Control.FontFamily" Value="/#Calibri" />
        <Setter Property="Control.FontSize" Value="12" />
        <Setter Property="Control.Margin" Value="2" />
        <Setter Property="Control.Height" Value="21" />
        <Setter Property="Control.VerticalAlignment" Value="Center" />
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Background" Value="{StaticResource WindowBackgroundBrush}"></Setter>
        <Setter Property="UndoLimit" Value="0"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TextBoxBase}">
                    <Border  
          Name="Border" 
          CornerRadius="1"  
          Padding="1" 
          Background="{TemplateBinding Background}" 
          BorderBrush="{StaticResource SolidBorderBrush}" 
          BorderThickness="1" >
                        <ScrollViewer Margin="0" x:Name="PART_ContentHost" />
                    </Border>
                    <ControlTemplate.Triggers>

                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                            <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                            <Setter Property="Cursor" Value="Arrow"/>
                        </Trigger>
                        <Trigger Property="IsReadOnly" Value="True">
                            <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                            <Setter Property="Focusable" Value="False"/>
                            <Setter Property="Cursor" Value="Arrow"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

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