Question

   <Style x:Key="TextInputStyle" TargetType="TextBox" BasedOn="{StaticResource {x:Type TextBox}}">
            <Setter Property="FontSize" Value="12"/>
            <Setter Property="Margin" Value="5,5,5,5"/>
            <Setter Property="VerticalAlignment" Value="Center"/>
            <Setter Property="Background" Value="Red"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Border x:Name="bg" BorderBrush="#FF7F98DC" BorderThickness="1">
                            <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="BorderBrush" TargetName="bg" Value="#FF7E97F0"/>
                                <Setter Property="BorderThickness" TargetName="bg" Value="2"/>
                            </Trigger>
                            <Trigger Property="IsFocused" Value="True">
                                <Setter Property="BorderBrush" TargetName="bg" Value="DarkBlue"/>
                                <Setter Property="BorderThickness" TargetName="bg" Value="2"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

这是我的App.xaml代码的一部分。

是textBox的样式。

但背景属性不起作用。

其他人工作得很好。

请帮帮我。为什么我不能改变TextBox的背景颜色？

Answer 1

您正在为文本框添加背景，而应将背景赋予边框，因为它已在控件模板中定义。

    <Style x:Key="TextInputStyle" TargetType="TextBox" BasedOn="{StaticResource {x:Type TextBox}}">
        <Setter Property="FontSize" Value="12"/>
        <Setter Property="Margin" Value="5,5,5,5"/>
        <Setter Property="VerticalAlignment" Value="Center"/>
        <Setter Property="Foreground" Value="AliceBlue"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate>
                    <Border x:Name="bg" BorderBrush="#FF7F98DC" BorderThickness="1" ***Background="Red"***>
                        <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="BorderBrush" TargetName="bg" Value="#FF7E97F0"/>
                            <Setter Property="BorderThickness" TargetName="bg" Value="2"/>
                        </Trigger>
                        <Trigger Property="IsFocused" Value="True">
                            <Setter Property="BorderBrush" TargetName="bg" Value="DarkBlue"/>
                            <Setter Property="BorderThickness" TargetName="bg" Value="2"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

请参阅上面ControlTemplate内的Border标签。

wpf文本框背景颜色不起作用

1 个答案: