WPF:圆角图像

Question

<Page
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Background="Black">
    <!-- Rounded yellow border -->
    <Border BorderThickness="3" BorderBrush="Yellow" CornerRadius="10" Padding="2"
        HorizontalAlignment="Center" VerticalAlignment="Center">
      <Grid>
         <!-- Rounded mask (stretches to fill Grid) -->
         <Border Name="mask" Background="White" CornerRadius="7"/>
         <!-- Main content container -->
         <StackPanel>
             <!-- Use a VisualBrush of 'mask' as the opacity mask -->
             <StackPanel.OpacityMask>
                 <VisualBrush Visual="{Binding ElementName=mask}"/>
             </StackPanel.OpacityMask>
             <!-- Any content -->
             <Image Source="http://chriscavanagh.files.wordpress.com/2006/12/chriss-blog-banner.jpg"/>
             <Rectangle Height="50" Fill="Red"/>
             <Rectangle Height="50" Fill="White"/>
             <Rectangle Height="50" Fill="Blue"/>
         </StackPanel>
      </Grid>
    </Border>
</Page>

这个XAML来自WPF - 简单的圆角适用于任何东西,但它不起作用我=(

<Border Canvas.Left="55"
        Canvas.Top="30"
        Width="100"
        Height="Auto"
        Margin="12,12,8,0"
        VerticalAlignment="Top"
        BorderBrush="#FF3B5998"
        BorderThickness=".5"
        CornerRadius="18">
    <Border.Effect>
        <DropShadowEffect BlurRadius="5"
                          Opacity=".5"
                          ShadowDepth="3" />
    </Border.Effect>
    <Border Name="ReceiverColor"
            BorderBrush="#FF96B2E4"
            BorderThickness="6"
            CornerRadius="15">
        <Border Name="Mask"
                BorderBrush="#FF3B5998"
                BorderThickness=".5"
                CornerRadius="13">
                <StackPanel>
                    <StackPanel.OpacityMask>
                        <VisualBrush Visual="{Binding ElementName=Mask}" />
                    </StackPanel.OpacityMask>
                    <Image Name="Receiver" />
                </StackPanel>
        </Border>
    </Border>
</Border>

---编辑--- 当窗口加载的边框大小变为图像大小但图像未显示时,
我将边框大小设置为自动并将图像源更改为链接中的
图像!

Answer 1

您忘记了制作蒙版和图像兄弟的网格,并将图像嵌套在蒙版中.你忘了设置面具的背景.

这有效:

<Grid>
    <Border Canvas.Left="55"
            Canvas.Top="30"
            Width="100"
            Height="Auto"
            Margin="12,12,8,0"
            VerticalAlignment="Top"
            BorderBrush="#FF3B5998"
            BorderThickness=".5"
            CornerRadius="18">
        <Border.Effect>
            <DropShadowEffect BlurRadius="5"
                              Opacity=".5"
                              ShadowDepth="3" />
        </Border.Effect>
        <Border Name="ReceiverColor"
                BorderBrush="#FF96B2E4"
                BorderThickness="6"
                CornerRadius="15">
            <Grid>
                <Border Name="Mask"
                        Background="White"
                        BorderBrush="#FF3B5998"
                        BorderThickness=".5"
                        CornerRadius="13">
                </Border>
                <StackPanel>
                    <Image Name="Receiver"
                           Source="/Images/test.jpg" />
                    <StackPanel.OpacityMask>
                        <VisualBrush Visual="{Binding ElementName=Mask}" />
                    </StackPanel.OpacityMask>
                </StackPanel>
            </Grid>
        </Border>
    </Border>
</Grid>

Answer 2

您可以定义一个<Border/>元素并将其<Border.Background/> 属性设置为<ImageBrush/>，然后设置Borders CornerRadius属性就可以了！

<Border CornerRadius="8,0,8,0">
    <Border.Background>
        <ImageBrush Stretch="Fill" ImageSource="ImageSource"/>
    </Border.Background>
</Border>

Answer 3

在wpf这个适合我

    <Ellipse Width="50" Height="50">
        <Ellipse.Fill>
            <ImageBrush ImageSource="http://chriscavanagh.files.wordpress.com/2006/12/chriss-blog-banner.jpg" />
        </Ellipse.Fill>
     </Ellipse>

Answer 4

上述答案都不适合我。我试图在图像上实现圆角，该图像可以调整大小并具有属性Stretch="UniformToFill" VerticalAlignment="Center"和HorizontalAlignment="Center"。当调整图像大小时，中心对齐会保留中间部分的裁剪，而不是裁剪底部和右侧。使用图像画笔的解决方案是有效的，但我在保持内容处于中心裁剪方面遇到了问题。

标记的答案存在透明非矩形图像的问题，因为“蒙版”边框最终将显示为白色背景。以下是对我有用的实现：

<Grid>
    <WrapPanel Name ="container">
        <Image Source="sample_image.png" VerticalAlignment="Center" HorizontalAlignment="Center" Stretch="UniformToFill"/>
        <WrapPanel.OpacityMask>
            <VisualBrush >
                <VisualBrush.Visual>
                    <Border Height="{Binding ElementName=container, Path=ActualHeight}" 
                            Width="{Binding ElementName=container, Path=ActualWidth}"
                            Background="White" CornerRadius="15" />
                </VisualBrush.Visual>
            </VisualBrush>
        </WrapPanel.OpacityMask>
    </WrapPanel>
</Grid>