WPF日期选择器文本框白色边框不可编辑。

Question

我正在编辑DatePicker的控件模板，但是TextBox的样式有问题。文本周围有一个白色边框，这不是实际的TextBox边框。 根据我的当前样式，我将TextBox放在一个Border里面，将TextBox的Background设置为透明，并将BorderThickness设置为0。

<Border Grid.Column="0" 
        Height="25"
        Background="DarkKhaki"
        CornerRadius="5"
        Grid.ColumnSpan="1">

<DatePickerTextBox x:Name="PART_TextBox" 
                   Background="Transparent"
                   Grid.Column="0" 
                   BorderThickness="0"
                   Focusable="{TemplateBinding Focusable}" 
                   HorizontalContentAlignment="Stretch" 
                   Grid.Row="0" 
                   Grid.ColumnSpan="1" 
                   Margin="1.143,0,1.056,0"/>
                            </Border>

这是使用此样式的日期选择器的外观：

如果我给文本框添加一个Border，它会出现在白色边框周围：

如果有人知道如何去掉这个额外的边框，将不胜感激！

- GDiff94

Answer 1

您可以为DatePickerTextBox创建一个新的Style：

XAML样式

这只是原始Style的复制，并将两个Border的Visibility更改为Hidden。

<Style x:Key="DatePickerTextBoxStyle1" TargetType="{x:Type DatePickerTextBox}">


<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/>
            <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
            <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
            <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type DatePickerTextBox}">
                        <Grid>
                            <Grid.Resources>
                                <SolidColorBrush x:Key="WatermarkBrush" Color="#FFAAAAAA"/>
                            </Grid.Resources>
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="CommonStates">
                                    <VisualStateGroup.Transitions>
                                        <VisualTransition GeneratedDuration="0"/>
                                        <VisualTransition GeneratedDuration="0:0:0.1" To="MouseOver"/>
                                    </VisualStateGroup.Transitions>
                                    <VisualState x:Name="Normal"/>
                                    <VisualState x:Name="MouseOver">
                                        <Storyboard>
                                            <ColorAnimation Duration="0" To="#FF99C1E2" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="ContentElement"/>
                                            <ColorAnimation Duration="0" To="#FF99C1E2" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="watermark_decorator"/>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                                <VisualStateGroup x:Name="WatermarkStates">
                                    <VisualStateGroup.Transitions>
                                        <VisualTransition GeneratedDuration="0"/>
                                    </VisualStateGroup.Transitions>
                                    <VisualState x:Name="Unwatermarked"/>
                                    <VisualState x:Name="Watermarked">
                                        <Storyboard>
                                            <DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="ContentElement"/>
                                            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PART_Watermark"/>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                                <VisualStateGroup x:Name="FocusStates">
                                    <VisualStateGroup.Transitions>
                                        <VisualTransition GeneratedDuration="0"/>
                                    </VisualStateGroup.Transitions>
                                    <VisualState x:Name="Unfocused"/>
                                    <VisualState x:Name="Focused">
                                        <Storyboard>
                                            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="FocusVisual"/>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <Border x:Name="Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="1" Opacity="1" Padding="{TemplateBinding Padding}">
                                <Grid x:Name="WatermarkContent" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                                    <Border x:Name="ContentElement" BorderBrush="#FFFFFFFF" BorderThickness="1" Visibility="Hidden"/>
                                    <Border x:Name="watermark_decorator" BorderBrush="#FFFFFFFF" BorderThickness="1" Visibility="Hidden">
                                        <ContentControl x:Name="PART_Watermark" Focusable="False" IsHitTestVisible="False" Opacity="0" Padding="2"/>
                                    </Border>
                                    <ScrollViewer x:Name="PART_ContentHost" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                                    <Border x:Name="FocusVisual" BorderBrush="#FF45D6FA" CornerRadius="1" IsHitTestVisible="False" Opacity="0"/>
                                </Grid>
                            </Border>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

XAML

    <Border
        Background="DarkKhaki" 
        VerticalAlignment="Center" 
        HorizontalAlignment="Center"
        CornerRadius="5">
        <DatePickerTextBox 
            x:Name="datePickerTextBox" 
            Height="25" 
            Width="120" 
            TextWrapping="Wrap" 
            Text="DatePickerTextBox" 
            Background="Transparent"
            HorizontalContentAlignment="Center"
            VerticalContentAlignment="Center"                 
            Style="{DynamicResource DatePickerTextBoxStyle1}"/>
    </Border>

预览

如果您创建一个新的Style，您也可以使用CornerRadius在"Khaki"Border中包含它。

---

感谢@OfficeAddinDev

通过将“watermark_decorator”边框的 Visibility = Hidden 设置为此答案删除了边框。只需更改为 Visible 并将 BorderThickness = 0 改为显示 "Select a date"，而不带有威胁的白色边框。

- Dominic Jonas

---

谢谢！虽然我将两个边框设置为可见，并将BorderThickness更改为0，否则“选择日期”文本将不可见。 - GDiff94

这个答案通过将“watermark_decorator” Border.Visibility = Hidden设置来移除边框。只需将其更改为Visible并将BorderThickness = 0更改，即可显示“选择日期”，而无需出现威胁性的白色边框。 - OfficeAddinDev

@OfficeAddinDev，谢谢您的回答！我已经添加了您的解决方案。 - Dominic Jonas

Answer 2

文本周围有一个白色边框，这不是实际的TextBox边框。

是的，这是DatePickerTextBox默认控件模板的一部分Border 。

如果您不想要它，您需要像@Dominic Jonas建议的那样覆盖模板。您应该可以摆脱两个内部的Border元素，它们都有一个硬编码的 BorderThickness 为 1 ：

<Border Grid.Column="0" 
        Height="25"
        Background="DarkKhaki"
        CornerRadius="5"
        Grid.ColumnSpan="1">
    <DatePickerTextBox x:Name="PART_TextBox" 
                   Background="Transparent"
                   Grid.Column="0" 
                   BorderThickness="0"
                   HorizontalContentAlignment="Stretch" 
                   Grid.Row="0" 
                   Grid.ColumnSpan="1" 
                   Margin="1.143,0,1.056,0">
        <DatePickerTextBox.Template>
            <ControlTemplate TargetType="DatePickerTextBox">
                <Grid x:Name="WatermarkContent" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                    <ContentControl x:Name="PART_Watermark" Focusable="False" IsHitTestVisible="False" Opacity="0" Padding="2"/>
                    <ScrollViewer x:Name="PART_ContentHost" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="0" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                </Grid>
            </ControlTemplate>
        </DatePickerTextBox.Template>
    </DatePickerTextBox>
</Border>

- mm8