如何在WPF中更改TextBox的禁用背景颜色

时间：2010-09-20 13:38:03

标签： wpf templates textbox background controls

我见过以下与我的问题有关的帖子：

WPF ComboBox: background color when disabled

以上内容涉及更改ComboBox的内容模板。我正在使用WPF，我对样式和模板有点新，我想将禁用的TextBox的暗灰色背景颜色更改为其他颜色。我们经常在我们的应用程序中使用TextBoxes，我们发现难以阅读的默认颜色设置。

我制作了以下解决方案尝试。但是，当然，它不起作用。有人可以给我一个意见吗？

Upload Image

7 个答案:

答案 0 :(得分：36)

不幸的是，对于TextBox控件，它看起来并不像在触发条件为真时添加触发器和更改背景颜色那么简单。您必须覆盖整个ControlTemplate才能实现此目的。下面是一个关于如何执行此操作的示例：

<Window x:Class="StackOverflow.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">

    <Window.Resources>
        <SolidColorBrush x:Key="DisabledForegroundBrush" Color="Red" />
        <SolidColorBrush x:Key="DisabledBackgroundBrush" Color="White" />
        <Style TargetType="TextBox">
            <Setter Property="Background" Value="White"/>
            <Setter Property="BorderBrush" Value="Black"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="TextBox">
                        <Border Name="Bd" BorderThickness="{TemplateBinding BorderThickness}" 
                                             BorderBrush="{TemplateBinding BorderBrush}" 
                                             Background="{TemplateBinding Background}" 
                                             SnapsToDevicePixels="true">
                            <ScrollViewer Name="PART_ContentHost" Background="{TemplateBinding Background}" 
                                          SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Value="{StaticResource DisabledBackgroundBrush}" Property="Background" />
                                <Setter Value="{StaticResource DisabledForegroundBrush}" Property="Foreground" />
                                <Setter TargetName="PART_ContentHost" Property="Background" Value="Blue"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>


    </Window.Resources>

    <Canvas>
        <TextBox Text="TextBox" IsEnabled="False"/>
        <TextBox Text="TextBox" IsEnabled="True" Canvas.Top="25"/>
    </Canvas>            
</Window>

修改

在回答您的问题时，我尝试将ComboBox样式添加到上面的原始答案中，并且我能够无误地集成它。我不确定它是否表现得像你想要的那样。我只是复制粘贴你指定链接中的内容。

<Window x:Class="StackOverflow.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:StackOverflow"
        Title="MainWindow" Height="350" Width="525"
        x:Name="window">
    <Window.Resources>
        <SolidColorBrush x:Key="DisabledForegroundBrush" Color="Red" />
        <SolidColorBrush x:Key="DisabledBackgroundBrush" Color="Blue" />

        <LinearGradientBrush x:Key="NormalBrush" StartPoint="0,0" EndPoint="0,1">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#FFF" Offset="0.0"/>
                    <GradientStop Color="#CCC" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="HorizontalNormalBrush" StartPoint="0,0" EndPoint="1,0">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#FFF" Offset="0.0"/>
                    <GradientStop Color="#CCC" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="LightBrush" StartPoint="0,0" EndPoint="0,1">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#FFF" Offset="0.0"/>
                    <GradientStop Color="#EEE" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="HorizontalLightBrush" StartPoint="0,0" EndPoint="1,0">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#FFF" Offset="0.0"/>
                    <GradientStop Color="#EEE" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="DarkBrush" StartPoint="0,0" EndPoint="0,1">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#FFF" Offset="0.0"/>
                    <GradientStop Color="#AAA" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="PressedBrush" StartPoint="0,0" EndPoint="0,1">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#BBB" Offset="0.0"/>
                    <GradientStop Color="#EEE" Offset="0.1"/>
                    <GradientStop Color="#EEE" Offset="0.9"/>
                    <GradientStop Color="#FFF" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <SolidColorBrush x:Key="WindowBackgroundBrush" Color="#FFF" />

        <SolidColorBrush x:Key="SelectedBackgroundBrush" Color="#DDD" />

        <!-- Border Brushes -->

        <LinearGradientBrush x:Key="NormalBorderBrush" StartPoint="0,0" EndPoint="0,1">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#CCC" Offset="0.0"/>
                    <GradientStop Color="#444" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="HorizontalNormalBorderBrush" StartPoint="0,0" EndPoint="1,0">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#CCC" Offset="0.0"/>
                    <GradientStop Color="#444" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="DefaultedBorderBrush" StartPoint="0,0" EndPoint="0,1">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#777" Offset="0.0"/>
                    <GradientStop Color="#000" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <LinearGradientBrush x:Key="PressedBorderBrush" StartPoint="0,0" EndPoint="0,1">
            <GradientBrush.GradientStops>
                <GradientStopCollection>
                    <GradientStop Color="#444" Offset="0.0"/>
                    <GradientStop Color="#888" Offset="1.0"/>
                </GradientStopCollection>
            </GradientBrush.GradientStops>
        </LinearGradientBrush>

        <SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAA" />

        <SolidColorBrush x:Key="SolidBorderBrush" Color="#888" />

        <SolidColorBrush x:Key="LightBorderBrush" Color="#AAA" />

        <!-- Miscellaneous Brushes -->
        <SolidColorBrush x:Key="GlyphBrush" Color="#444" />

        <SolidColorBrush x:Key="LightColorBrush" Color="#DDD" />

        <ControlTemplate x:Key="ComboBoxToggleButton" TargetType="ToggleButton">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                    <ColumnDefinition Width="20" />
                </Grid.ColumnDefinitions>
                <Border
      x:Name="Border" 
      Grid.ColumnSpan="2"
      CornerRadius="2"
      Background="{StaticResource NormalBrush}"
      BorderBrush="{StaticResource NormalBorderBrush}"
      BorderThickness="1" />
                <Border 
      Grid.Column="0"
      CornerRadius="2,0,0,2" 
      Margin="1" 
      Background="{StaticResource WindowBackgroundBrush}" 
      BorderBrush="{StaticResource NormalBorderBrush}"
      BorderThickness="0,0,1,0" />
                <Path 
      x:Name="Arrow"
      Grid.Column="1"     
      Fill="{StaticResource GlyphBrush}"
      HorizontalAlignment="Center"
      VerticalAlignment="Center"
      Data="M 0 0 L 4 4 L 8 0 Z"/>
            </Grid>
            <ControlTemplate.Triggers>
                <Trigger Property="ToggleButton.IsMouseOver" Value="true">
                    <Setter TargetName="Border" Property="Background" Value="{StaticResource DarkBrush}" />
                </Trigger>
                <Trigger Property="ToggleButton.IsChecked" Value="true">
                    <Setter TargetName="Border" Property="Background" Value="{StaticResource PressedBrush}" />
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}" />
                    <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource DisabledBorderBrush}" />
                    <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                    <Setter TargetName="Arrow" Property="Fill" Value="{StaticResource DisabledForegroundBrush}" />
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>

        <ControlTemplate x:Key="ComboBoxTextBox" TargetType="TextBox">
            <Border x:Name="PART_ContentHost" Focusable="False" Background="{TemplateBinding Background}" />
        </ControlTemplate>

        <Style x:Key="{x:Type ComboBox}" TargetType="ComboBox">
            <Setter Property="SnapsToDevicePixels" Value="true"/>
            <Setter Property="OverridesDefaultStyle" Value="true"/>
            <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
            <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
            <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
            <Setter Property="MinWidth" Value="120"/>
            <Setter Property="MinHeight" Value="20"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ComboBox">
                        <Grid>
                            <ToggleButton 
            Name="ToggleButton" 
            Template="{StaticResource ComboBoxToggleButton}" 
            Grid.Column="2" 
            Focusable="false"
            IsChecked="{Binding Path=IsDropDownOpen,Mode=TwoWay,RelativeSource={RelativeSource TemplatedParent}}"
            ClickMode="Press">
                            </ToggleButton>
                            <ContentPresenter
            Name="ContentSite"
            IsHitTestVisible="False" 
            Content="{TemplateBinding SelectionBoxItem}"
            ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
            ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}"
            Margin="3,3,23,3"
            VerticalAlignment="Center"
            HorizontalAlignment="Left" />
                            <TextBox x:Name="PART_EditableTextBox"
            Style="{x:Null}" 
            Template="{StaticResource ComboBoxTextBox}" 
            HorizontalAlignment="Left" 
            VerticalAlignment="Center" 
            Margin="3,3,23,3"
            Focusable="True" 
            Background="Transparent"
            Visibility="Hidden"
            IsReadOnly="{TemplateBinding IsReadOnly}"/>
                            <Popup 
            Name="Popup"
            Placement="Bottom"
            IsOpen="{TemplateBinding IsDropDownOpen}"
            AllowsTransparency="True" 
            Focusable="False"
            PopupAnimation="Slide">
                                <Grid 
              Name="DropDown"
              SnapsToDevicePixels="True"                
              MinWidth="{TemplateBinding ActualWidth}"
              MaxHeight="{TemplateBinding MaxDropDownHeight}">
                                    <Border 
                x:Name="DropDownBorder"
                Background="{StaticResource WindowBackgroundBrush}"
                BorderThickness="1"
                BorderBrush="{StaticResource SolidBorderBrush}"/>
                                    <ScrollViewer Margin="4,6,4,6" SnapsToDevicePixels="True">
                                        <StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained" />
                                    </ScrollViewer>
                                </Grid>
                            </Popup>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="HasItems" Value="false">
                                <Setter TargetName="DropDownBorder" Property="MinHeight" Value="95"/>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                            </Trigger>
                            <Trigger Property="IsGrouping" Value="true">
                                <Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
                            </Trigger>
                            <Trigger SourceName="Popup" Property="Popup.AllowsTransparency" Value="true">
                                <Setter TargetName="DropDownBorder" Property="CornerRadius" Value="4"/>
                                <Setter TargetName="DropDownBorder" Property="Margin" Value="0,2,0,0"/>
                            </Trigger>
                            <Trigger Property="IsEditable"
               Value="true">
                                <Setter Property="IsTabStop" Value="false"/>
                                <Setter TargetName="PART_EditableTextBox" Property="Visibility"    Value="Visible"/>
                                <Setter TargetName="ContentSite" Property="Visibility" Value="Hidden"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Style.Triggers>
            </Style.Triggers>
        </Style>

        <Style TargetType="TextBox">
            <Setter Property="Background" Value="White"/>
            <Setter Property="BorderBrush" Value="Black"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="TextBox">
                        <Border Name="Bd" BorderThickness="{TemplateBinding BorderThickness}" 
                                             BorderBrush="{TemplateBinding BorderBrush}" 
                                             Background="{TemplateBinding Background}" 
                                             SnapsToDevicePixels="true">
                            <ScrollViewer Name="PART_ContentHost" Background="{TemplateBinding Background}" 
                                          SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Value="{StaticResource DisabledBackgroundBrush}" Property="Background" />
                                <Setter Value="{StaticResource DisabledForegroundBrush}" Property="Foreground" />
                                <Setter TargetName="PART_ContentHost" Property="Background" Value="{StaticResource DisabledBackgroundBrush}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>

    <StackPanel>
        <TextBox IsEnabled="False">TextBox</TextBox>
        <ComboBox IsEnabled="False"/>
    </StackPanel>
</Window>

答案 1 :(得分：25)

您可以使用以下代码段：

不使用检查IsEnable属性，而是使用TextBox控件的IsReadonly属性。

<Style TargetType="{x:Type TextBox}">
    <Setter Property="Background" Value="LightSkyBlue" />
    <Style.Triggers>
        <Trigger Property="IsReadOnly" Value="True">
            <Setter Property="Background" Value="Red" />
        </Trigger>
    </Style.Triggers>
</Style>

如果您需要将其应用于所有文本框控件，请使用上面的代码。 对于特定的文本框，只需设置密钥并将样式应用于该文本框。

答案 2 :(得分：7)

对于这种情况，我喜欢设置Focusable=false并将背景颜色设置为我想要的值（在数据绑定触发器中）。这可能有点hacky，但重写整个TextBox的控件模板也是如此。 Focusable的替代方法是IsReadyOnly，但这对于许多控件都不起作用。但确实可以确保插入符号消失。

答案 3 :(得分：4)

您永远不会使用您定义的ControlTemplate。此外，您需要一个Style，而不是（必然）ControlTemplate。

我认为您需要以下内容：

<Canvas.Resources>
        <SolidColorBrush x:Key="DisabledForegroundBrush" Color="Red" />
        <SolidColorBrush x:Key="DisabledBackgroundBrush" Color="White" />
        <Style TargetType="{x:Type TextBox}">
            <Style.Triggers>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}" />
                    <Setter Property="Background" Value="{StaticResource DisabledBackgroundBrush}" />
                </Trigger>
            </Style.Triggers>
        </Style>
</Canvas.Resources>

答案 4 :(得分：2)

尽量避免重新定义控件模板。它们往往会增加大量代码开销，并且随着时间的推移可能难以维护。

我会在Loaded事件中使用以下代码：

ClassicBorderDecorator o = VisualTreeHelper.GetChild(this.textBox1, 0) as ClassicBorderDecorator;
if (o != null)
{
    o.Background = new SolidColorBrush(Colors.Transparent);
}

答案 5 :(得分：1)

如果查看文本框的模板，您会注意到该模板具有IsEnabled属性False的触发器，并将其边框元素“Bd”背景颜色设置为SystemColors.ControlBrushKey。

如果在样式中覆盖此颜色，它将实现您想要的效果。

<Style TargetType="{x:Type TextBox}">
  <Style.Resources>
    <SolidColorBrush 
       x:Key="{x:Static SystemColors.ControlBrushKey}" 
       Color="{StaticResource MyNewTextBoxBackgroundColor}" />
  </Style.Resources>
</Style>

答案 6 :(得分：0)

By adding <Window.Resources> after <Window> and before <Grid> will make your text box behave like normal winforms textbox.

<Window x:Class="..." Height="330" Width="600" Loaded="Window_Loaded" WindowStartupLocation="CenterOwner">

<Window.Resources>
    <Style TargetType="{x:Type TextBox}">
        <Style.Triggers>
            <Trigger Property="IsReadOnly" Value="True">
                <Setter Property="Background" Value="LightGray" />
            </Trigger>
            <Trigger Property="IsReadOnly" Value="False">
                <Setter Property="Background" Value="White" />
            </Trigger>
        </Style.Triggers>
    </Style>
</Window.Resources>

<Grid>

从以下网页获取的代码：

wpf: Selecting the Text in TextBox with IsReadOnly = true?

并修改了样式以匹配winforms。 （它们的外观已启用= false，而不是readonly = true）

当然，你的文本框必须有IsReadOnly =＆＃34; True＆＃34;属性集。

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