WPF TextBox 丑边框问题

Question

我想覆盖 WPF 中的默认 TextBox 边框。我有这种适用于所有文本框的样式。

<!-- StyleTextBox-->
<Style x:Key="StyleTextBox" TargetType="{x:Type TextBox}">
    <Setter Property="MinHeight" Value="20" />
    <Setter Property="HorizontalAlignment" Value="Left"/>
    <Setter Property="Margin" Value="3"/>
    <Setter Property="IsEnabled" Value="{DynamicResource WriteAble}"/>
    <Setter Property="SnapsToDevicePixels" Value="True" />
    <Setter Property="VerticalContentAlignment" Value="Top" />
    <Setter Property="BorderThickness" Value="1" />
    <Setter Property="BorderBrush" Value="{StaticResource ButtonFont_DarkGray}" />
    <Style.Triggers>
        <!--Resolves multiline textbox vertical alignment problem-->
        <Trigger Property="TextWrapping" Value="NoWrap">
            <Setter Property="VerticalContentAlignment" Value="Center" />
        </Trigger>
    </Style.Triggers>
</Style> 

我加了 SnapsToDevicePixels="True"以在 LCD 显示器上正确显示边框。

但是，每个 TextBox 似乎都不同。一些边框丢失，或灰色..
有谁知道为什么？

Answer 1

您可以尝试编辑文本框的模板并将边框名称 Bd 更改为“真实”边框而不是 chrome 边框。像这样:

<ControlTemplate x:Key="TextBoxBaseControlTemplate1" 
          TargetType="{x:Type TextBoxBase}">
  <Border x:Name="Bd" SnapsToDevicePixels="True" 
          Background="{TemplateBinding Background}" 
          BorderBrush="{TemplateBinding BorderBrush}"
          BorderThickness="{TemplateBinding BorderThickness}" >
    <ScrollViewer x:Name="PART_ContentHost" 
              SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
  </Border>
  <ControlTemplate.Triggers>
    <Trigger Property="IsEnabled" Value="False">
      <Setter Property="Background" TargetName="Bd" 
            Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
      <Setter Property="Foreground" 
           Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
    </Trigger>
  </ControlTemplate.Triggers>
</ControlTemplate>

将此 setter 添加到您的样式以启用模板:

<Setter Property="Template" 
        Value="{DynamicResource TextBoxBaseControlTemplate1}"/>