在WP7中更改文本框的背景/前景色焦点

Question

每当文本框获得焦点时，根据当前主题更改文本的边框和前景色：

主题为浅色时->边框：黑色，文本：白色，背景：透明

主题为深色时->边框：白色，文本：白色，背景：白色

我希望文本框始终具有这些设置：边框：白色，文本：白色，背景：透明。我可以在文本框没有焦点时控制这些设置，但是一旦它获得焦点，我就无法更改背景。

文本框的XML如下：

<TextBox    InputScope="EmailSmtpAddress" Height="72" LostFocus="textBox1_LostFocus"  GotFocus="textBox1_GotFocus" HorizontalAlignment="Left" Margin="0,62,0,0" Name="textBox1" Text="Enter URL here..." VerticalAlignment="Top" Width="460" TextChanged="textBox1_TextChanged" Foreground="White" Background="#005DADF5" SelectionForeground="White" BorderBrush="#DEEAEAEA" FontFamily="Tahoma" FontWeight="Normal" />

- smohamed

Answer 1

您可以使用模板覆盖默认样式：

<Style x:Key="TextBoxStyle1" TargetType="TextBox">
        <Setter Property="FontFamily" Value="{StaticResource PhoneFontFamilyNormal}" />
        <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeMediumLarge}" />
        <Setter Property="Background" Value="{StaticResource PhoneTextBoxBrush}" />
        <Setter Property="Foreground" Value="{StaticResource PhoneTextBoxForegroundBrush}" />
        <Setter Property="BorderBrush" Value="{StaticResource PhoneTextBoxBrush}" />
        <Setter Property="SelectionBackground" Value="{StaticResource PhoneAccentBrush}" />
        <Setter Property="SelectionForeground" Value="{StaticResource PhoneTextBoxSelectionForegroundBrush}" />
        <Setter Property="BorderThickness" Value="{StaticResource PhoneBorderThickness}" />
        <Setter Property="Padding" Value="2" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="TextBox">
                    <Grid Background="Transparent">
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal" />
                                <VisualState x:Name="MouseOver" />
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="EnabledBorder" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Collapsed</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DisabledOrReadonlyBorder" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="ReadOnly">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="EnabledBorder" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Collapsed</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DisabledOrReadonlyBorder" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DisabledOrReadonlyBorder" Storyboard.TargetProperty="Background">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DisabledOrReadonlyBorder" Storyboard.TargetProperty="BorderBrush">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DisabledOrReadonlyContent" Storyboard.TargetProperty="Foreground">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxReadOnlyBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="FocusStates">
                                <VisualState x:Name="Focused">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="EnabledBorder" Storyboard.TargetProperty="Background">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
        <!-- COMMENT THIS OUT ----->    <!--<ObjectAnimationUsingKeyFrames Storyboard.TargetName="EnabledBorder" Storyboard.TargetProperty="BorderBrush">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBorderBrush}" />
                                        </ObjectAnimationUsingKeyFrames>-->
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Unfocused" />
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                        <Border x:Name="EnabledBorder"
                                Margin="{StaticResource PhoneTouchTargetOverhang}"
                                Background="{TemplateBinding Background}"
                                BorderBrush="{TemplateBinding BorderBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}">
                            <ContentControl x:Name="ContentElement"
                                            Margin="{StaticResource PhoneTextBoxInnerMargin}"
                                            HorizontalContentAlignment="Stretch"
                                            VerticalContentAlignment="Stretch"
                                            BorderThickness="0"
                                            Padding="{TemplateBinding Padding}" />
                        </Border>
                        <Border x:Name="DisabledOrReadonlyBorder"
                                Margin="{StaticResource PhoneTouchTargetOverhang}"
                                Background="Transparent"
                                BorderBrush="{StaticResource PhoneDisabledBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}"
                                Visibility="Collapsed">
                            <TextBox x:Name="DisabledOrReadonlyContent"
                                     Background="Transparent"
                                     FontFamily="{TemplateBinding FontFamily}"
                                     FontSize="{TemplateBinding FontSize}"
                                     FontStyle="{TemplateBinding FontStyle}"
                                     FontWeight="{TemplateBinding FontWeight}"
                                     Foreground="{StaticResource PhoneDisabledBrush}"
                                     IsReadOnly="True"
                                     SelectionBackground="{TemplateBinding SelectionBackground}"
                                     SelectionForeground="{TemplateBinding SelectionForeground}"
                                     Template="{StaticResource PhoneDisabledTextBoxTemplate}"
                                     Text="{TemplateBinding Text}"
                                     TextAlignment="{TemplateBinding TextAlignment}"
                                     TextWrapping="{TemplateBinding TextWrapping}" />
                        </Border>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

我使用Expression Blend获取默认模板，然后通过注释掉更改Focused VisualState中的BorderBrush的ObjectAnimationUsingKeyFrames元素来修改它。将此样式应用于TextBox并将其BorderBrush更改为您的颜色。

<TextBox BorderBrush="Red" Style="{StaticResource TextBoxStyle1}" />

- Adam Anderson

Answer 2

最简单的方法是在GotFocus事件上进行设置。

TextBox的XamlCode：

<TextBox x:Name="InputUserName"
         Foreground="Black"
         Background="LightGray"
         BorderBrush="LightGray"
         GotFocus="GotFocusaAction" />

GotFocusAction的Codebehind：

private void GotFocusaAction(object sender, System.Windows.RoutedEventArgs e)
    {
        InputUserName.Background = new SolidColorBrush(Colors.LightGray);
        InputUserName.BorderBrush = new SolidColorBrush(Colors.LightGray);
    }

当您想将聚焦的文本框颜色设置为不同的颜色时，还应将失去焦点事件设置为更改背景颜色。

TextBox的XamlCode：

<TextBox x:Name="InputUserName"
     Foreground="Black"
     Background="Red"
     BorderBrush="Red"
     GotFocus="GotFocusaAction"
     LostFocus="GotFocusaAction" />

代码后置文件：

private void GotFocusaAction(object sender, System.Windows.RoutedEventArgs e)
    {
        InputUserName.Background = new SolidColorBrush(Colors.Purple);
        InputUserName.BorderBrush = new SolidColorBrush(Colors.Purple);
    }

    private void LostFocusAction(object sender, System.Windows.RoutedEventArgs e)
    {
        InputUserName.Background = new SolidColorBrush(Colors.Red);
        InputUserName.BorderBrush = new SolidColorBrush(Colors.Red);
    }

- klingu

Answer 3

显然，当文本框获得焦点时，无法更改其背景，特别是在深色主题下（即使在系统集成的文本框中也是如此）。因此，我想出了一个解决方案来解决我的问题：我创建了两个文本框实例，完全重叠在一起，并将前面一个的不透明度设置为0（完全不可见）。然后，我通过代码连接了这两个文本框，以便如果前面的文本框被输入（它是不可见的，所以没有人会看到正在输入的文本），我会编辑后面一个文本框的文本，使其完全相同。

- smohamed

Answer 4

您需要注释一个更大的区域：

<VisualStateGroup x:Name="FocusStates">
                                        <VisualState x:Name="Focused">
                                            <!--<Storyboard>
                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="EnabledBorder" Storyboard.TargetProperty="Background">
                                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBackgroundBrush}" />
                                                </ObjectAnimationUsingKeyFrames>
                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="EnabledBorder" Storyboard.TargetProperty="BorderBrush">
                                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBorderBrush}" />
                                                </ObjectAnimationUsingKeyFrames>
                                            </Storyboard>-->
                                        </VisualState>
                                        <VisualState x:Name="Unfocused" />
                                    </VisualStateGroup>

- bachmann