c# – 在WP7中更改聚焦文本框背景/前景

发布时间：2020-12-15 20:46:21 所属栏目：百科来源：网络整理

导读：每当文本框被聚焦时,文本的边框和前景都会根据当前主题进行更改：主题灯 – 边框：黑色,文字：白色,背景：透明主题黑暗 – 边框：白色,背景：白色我希望文本框始终有边框：白色,背景：透明我可以在文本框未聚焦时控制这些设置,但是当它具有焦点时我无法

每当文本框被聚焦时,文本的边框和前景都会根据当前主题进行更改：

主题灯 – >边框：黑色,文字：白色,背景：透明

主题黑暗 – >边框：白色,背景：白色

我希望文本框始终有边框：白色,背景：透明

我可以在文本框未聚焦时控制这些设置,但是当它具有焦点时我无法更改背景.

文本框的XML是：

<TextBox    InputScope="EmailSmtpAddress" Height="72" LostFocus="textBox1_LostFocus"  GotFocus="textBox1_GotFocus" HorizontalAlignment="Left" Margin="0,62,0" 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" />

解决方法

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,然后通过删除(注释掉)改变了Focused VisualState中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}" />

（编辑：李大同）

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