LayoutInformation 类

  • 参考

定义

命名空间:
Microsoft.UI.Xaml.Controls.Primitives
编辑

定义提供有关元素布局的其他信息的方法。

public ref class LayoutInformation sealed
/// [Windows.Foundation.Metadata.ContractVersion(Microsoft.UI.Xaml.WinUIContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class LayoutInformation final
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.WinUIContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class LayoutInformation
Public NotInheritable Class LayoutInformation
继承
Object Platform::Object IInspectable LayoutInformation
属性
ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

示例

以下示例演示如何使用 GetLayoutSlot 并绘制 Rectangle 的边界框。

<StackPanel x:Name="sp1" Grid.Row="0" Background="LightBlue"
            Height="100" Width="200"
            HorizontalAlignment="Left" VerticalAlignment="Top" >
    <Rectangle x:Name="rect1" Fill="Blue"  Width="100" Height="50" ></Rectangle>
</StackPanel>
<Button Content="Get Layout Slot" 
        Grid.Row="1" Width="150" Height="50" 
        Click="Button_Click" HorizontalAlignment="Left"/>

private void Button_Click(object sender, RoutedEventArgs e)
{
    //Get Layout Slot of Rectangle
    Windows.Foundation.Rect r1 = LayoutInformation.GetLayoutSlot(rect1);
    RectangleGeometry rg1 = new RectangleGeometry();
    rg1.Rect = r1;
    Path mypath = new Path();
    mypath.Data = rg1;
    mypath.Stroke = new SolidColorBrush(Colors.Red);
    mypath.StrokeThickness = 4;
    LayoutRoot.Children.Add(mypath);
}

方法

GetAvailableSize(UIElement)

返回最近用于度量指定元素的 Size 值。
GetLayoutExceptionElement(Object)

返回在出现未经处理的异常时布局系统正在处理的元素。
GetLayoutSlot(FrameworkElement)

返回包含指定元素的布局槽或边界框。

适用于