如何创建WPF圆角容器？

Question

我们正在创建一个XBAP应用程序，我们需要在单个页面中的不同位置具有圆角，并且我们希望有一个WPF Rounded Corner容器来放置一堆其他元素。有没有人对我们如何才能最好地完成这项工作有一些建议或示例代码？在a上创建自定义控件还是创建自定义控件？

Answer 1

您不需要自定义控件，只需将容器放在border元素中：

<Border BorderBrush="#FF000000" BorderThickness="1" CornerRadius="8">
   <Grid/>
</Border>

您可以将<Grid/>替换为任何布局容器......

Answer 2

我知道这不是最初问题的答案......但是您经常想要剪切刚刚创建的圆角边界的内部内容。

Chris Cavanagh提出了一个这样做的好方法。

我尝试了几种不同的方法......我觉得这个方法很震撼。

以下是xaml：

<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
        HorizontalAlignment="Center"
        VerticalAlignment="Center"
        BorderBrush="Yellow"
        BorderThickness="3"
        CornerRadius="10"
        Padding="2"
    >
        <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>

Answer 3

我必须自己做，所以我想我会在这里发布另一个答案。

这是另一种创建圆角边框并剪切其内部内容的方法。这是使用Clip属性的简单方法。如果你想避免使用VisualBrush，这很好。

xaml：

<Border
    Width="200"
    Height="25"
    CornerRadius="11"
    Background="#FF919194"
>
    <Border.Clip>
        <RectangleGeometry
            RadiusX="{Binding CornerRadius.TopLeft, RelativeSource={RelativeSource AncestorType={x:Type Border}}}"
            RadiusY="{Binding RadiusX, RelativeSource={RelativeSource Self}}"
        >
            <RectangleGeometry.Rect>
                <MultiBinding
                    Converter="{StaticResource widthAndHeightToRectConverter}"
                >
                    <Binding
                        Path="ActualWidth"
                        RelativeSource="{RelativeSource AncestorType={x:Type Border}}"
                    />
                    <Binding
                        Path="ActualHeight"
                        RelativeSource="{RelativeSource AncestorType={x:Type Border}}"
                    />
                </MultiBinding>
            </RectangleGeometry.Rect>
        </RectangleGeometry>
    </Border.Clip>

    <Rectangle
        Width="100"
        Height="100"
        Fill="Blue"
        HorizontalAlignment="Left"
        VerticalAlignment="Center"
    />
</Border>

转换器的代码：

public class WidthAndHeightToRectConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        double width = (double)values[0];
        double height = (double)values[1];
        return new Rect(0, 0, width, height);
    }
    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

Answer 4

基于VB.Net代码的kobusb边界控制解决方案的实现。我用它来填充Button控件的ListBox。 Button控件是从MEF扩展创建的。每个扩展使用MEF的ExportMetaData属性作为扩展的描述。扩展名是VisiFire图表对象。用户按下从按钮列表中选择的按钮，以执行所需的图表。

        ' Create a ListBox of Buttons, one button for each MEF charting component. 
    For Each c As Lazy(Of ICharts, IDictionary(Of String, Object)) In ext.ChartDescriptions
        Dim brdr As New Border
        brdr.BorderBrush = Brushes.Black
        brdr.BorderThickness = New Thickness(2, 2, 2, 2)
        brdr.CornerRadius = New CornerRadius(8, 8, 8, 8)
        Dim btn As New Button
        AddHandler btn.Click, AddressOf GenericButtonClick
        brdr.Child = btn
        brdr.Background = btn.Background
        btn.Margin = brdr.BorderThickness
        btn.Width = ChartsLBx.ActualWidth - 22
        btn.BorderThickness = New Thickness(0, 0, 0, 0)
        btn.Height = 22
        btn.Content = c.Metadata("Description")
        btn.Tag = c
        btn.ToolTip = "Push button to see " & c.Metadata("Description").ToString & " chart"
        Dim lbi As New ListBoxItem
        lbi.Content = brdr
        ChartsLBx.Items.Add(lbi)
    Next

Public Event Click As RoutedEventHandler

Private Sub GenericButtonClick(sender As Object, e As RoutedEventArgs)
    Dim btn As Button = DirectCast(sender, Button)
    Dim c As Lazy(Of ICharts, IDictionary(Of String, Object)) = DirectCast(btn.Tag, Lazy(Of ICharts, IDictionary(Of String, Object)))
    Dim w As Window = DirectCast(c.Value, Window)
    Dim cc As ICharts = DirectCast(c.Value, ICharts)
    c.Value.CreateChart()
    w.Show()
End Sub

<System.ComponentModel.Composition.Export(GetType(ICharts))> _
<System.ComponentModel.Composition.ExportMetadata("Description", "Data vs. Time")> _
Public Class DataTimeChart
    Implements ICharts

    Public Sub CreateChart() Implements ICharts.CreateChart
    End Sub
End Class

Public Interface ICharts
    Sub CreateChart()
End Interface

Public Class Extensibility
    Public Sub New()
        Dim catalog As New AggregateCatalog()

        catalog.Catalogs.Add(New AssemblyCatalog(GetType(Extensibility).Assembly))

        'Create the CompositionContainer with the parts in the catalog
        ChartContainer = New CompositionContainer(catalog)

        Try
            ChartContainer.ComposeParts(Me)
        Catch ex As Exception
            Console.WriteLine(ex.ToString)
        End Try
    End Sub

    ' must use Lazy otherwise instantiation of Window will hold open app. Otherwise must specify Shutdown Mode of "Shutdown on Main Window".
    <ImportMany()> _
    Public Property ChartDescriptions As IEnumerable(Of Lazy(Of ICharts, IDictionary(Of String, Object)))

End Class

Answer 5

如果您尝试将按钮放在圆角矩形边框中，则应该查看 msdn的例子。我通过谷歌搜索问题的图像（而不是文本）找到了这个。它们庞大的外部矩形（幸运的是）易于移除。

请注意，您必须重新定义按钮的行为（因为您已更改了ControlTemplate）。也就是说，在ControlTemplate.Triggers中使用Trigger标记（Property = <！> quot; IsPressed <！>; Value = <！> quot; true <！> quot;）单击时，您需要定义按钮的行为标签。希望这可以节省别人我失去的时间：）