边境WPF上的丑陋边界

Question

我有简单的UserControl图像和弹出窗口。

<UserControl x:Class="Dziennik.Controls.ImageButton"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="30" d:DesignWidth="100">
    <Button x:Name="button" DataContext="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}" Command="{Binding Command}" CommandParameter="{Binding CommandParameter}"
            Background="Transparent"
            BorderBrush="Transparent"
            BorderThickness="0">
        <StackPanel Orientation="Horizontal">
            <Image x:Name="image" Source="{Binding ImageSource}" VerticalAlignment="Center"/>
            <Popup PlacementTarget="{Binding ElementName=button}" Placement="Bottom" IsOpen="{Binding IsMouseOver, ElementName=button,Mode=OneWay}">
                <Border BorderThickness="0" Background="#FFBEE6FD">
                    <TextBlock Text="{Binding Text}" FontWeight="Bold" FontSize="14" Margin="10,5,10,5" VerticalAlignment="Center" HorizontalAlignment="Center"/>
                    </Border>
            </Popup>
        </StackPanel>
    </Button>
</UserControl>

我的问题是我将BorderThickness设置为0，但在边框上有时我可以看到小的黑色边框，具体取决于边框宽度。

我会用图像来解释我的问题 我有这个：http://i.imgur.com/74k6FJs.png
而不是：http://i.imgur.com/2dManE1.png

编辑：解决方案

好的，我终于找到了解决方案。我不得不在Popup属性中添加allowsTransparency =“True”。 代码现在看起来像这样：

<UserControl x:Class="Dziennik.Controls.ImageButton"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="30" d:DesignWidth="100">
    <Button x:Name="button" DataContext="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}" Command="{Binding Command}" CommandParameter="{Binding CommandParameter}"
            Background="Transparent"
            BorderBrush="Transparent"
            BorderThickness="0">
        <StackPanel Orientation="Horizontal">
            <Image x:Name="image" Source="{Binding ImageSource}" VerticalAlignment="Center"/>
            <Popup PlacementTarget="{Binding ElementName=button}" Placement="Bottom" IsOpen="{Binding IsMouseOver, ElementName=button,Mode=OneWay}" AllowsTransparency="True">
                <Border BorderThickness="0" Background="#FFBEE6FD">
                    <TextBlock Text="{Binding Text}" FontWeight="Bold" FontSize="14" Margin="10,5,10,5" VerticalAlignment="Center" HorizontalAlignment="Center"/>
                </Border>
            </Popup>
        </StackPanel>
    </Button>
</UserControl>

Answer 1

解的

好的，我终于找到了解决方案。我不得不在Popup属性中添加allowsTransparency =“True”。 代码现在看起来像这样：

<UserControl x:Class="Dziennik.Controls.ImageButton"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="30" d:DesignWidth="100">
    <Button x:Name="button" DataContext="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}" Command="{Binding Command}" CommandParameter="{Binding CommandParameter}"
            Background="Transparent"
            BorderBrush="Transparent"
            BorderThickness="0">
        <StackPanel Orientation="Horizontal">
            <Image x:Name="image" Source="{Binding ImageSource}" VerticalAlignment="Center"/>
            <Popup PlacementTarget="{Binding ElementName=button}" Placement="Bottom" IsOpen="{Binding IsMouseOver, ElementName=button,Mode=OneWay}" AllowsTransparency="True">
                <Border BorderThickness="0" Background="#FFBEE6FD">
                    <TextBlock Text="{Binding Text}" FontWeight="Bold" FontSize="14" Margin="10,5,10,5" VerticalAlignment="Center" HorizontalAlignment="Center"/>
                </Border>
            </Popup>
        </StackPanel>
    </Button>
</UserControl>

Answer 2

  

...但在边境有时我可以看到小的黑色边框，具体取决于边框宽度

您从未定义边框颜色，因此默认情况下它将为黑色（如果您没有全局样式）。您可以将BorderBrush设置为与BackgroundBrush相同的颜色，以使其匹配。

如果您有时看到黑色边框，即使您的厚度为0，请参阅SnapToDevicePixels是否修复了它。