Answers:
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>您可以将其替换为<Grid/>任何布局容器...
<Border BorderBrush="Black" BorderThickness="1" CornerRadius="8">是对此的合适替代，更简洁
我知道这不是最初问题的答案...但是您经常想裁剪刚创建的圆角边框的内部内容。
克里斯·卡瓦纳（Chris Cavanagh）提出了一种出色的方法来做到这一点。
我已经尝试了几种不同的方法来解决这个问题……而且我认为这很困难。
这是下面的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>我只需要自己做，所以我想在这里再发表一个答案。
这是创建圆角边框并裁剪其内部内容的另一种方法。这是使用Clip属性的直接方法。如果您想避免使用VisualBrush，那就太好了。
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();
}
}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如果您尝试将按钮置于圆角矩形边框中，则应查看msdn的example。我通过搜索问题的图像（而不是文本）发现了这一点。笨重的外部矩形很容易（很容易）删除。
注意，您将不得不重新定义按钮的行为（因为您已经更改了ControlTemplate）。也就是说，您需要使用ControlTemplate.Triggers标记中的Trigger标记（Property =“ IsPressed” Value =“ true”）定义单击按钮时的行为。希望这可以节省我失去的时间:)