RenderOptions.SetCacheInvalidationThresholdMinimum 方法
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
设置指定的依赖对象上的 CacheInvalidationThresholdMinimum 附加属性值。
public:
static void SetCacheInvalidationThresholdMinimum(System::Windows::DependencyObject ^ target, double cacheInvalidationThresholdMinimum);public static void SetCacheInvalidationThresholdMinimum (System.Windows.DependencyObject target, double cacheInvalidationThresholdMinimum);static member SetCacheInvalidationThresholdMinimum : System.Windows.DependencyObject * double -> unitPublic Shared Sub SetCacheInvalidationThresholdMinimum (target As DependencyObject, cacheInvalidationThresholdMinimum As Double)参数
- target
- DependencyObject
要在其上设置 CacheInvalidationThresholdMinimum 属性值的依赖对象。
- cacheInvalidationThresholdMinimum
- Double
要将此属性设为的新值。
例外
指定的 target 为 null。
示例
如下示例演示如何对 DrawingBrush 使用缓存提示选项。
DrawingBrush drawingBrush = new DrawingBrush();
// Set the caching hint option for the brush.
RenderOptions.SetCachingHint(drawingBrush, CachingHint.Cache);
// Set the minimum and maximum relative sizes for regenerating the tiled brush.
// The tiled brush will be regenerated and re-cached when its size is
// 0.5x or 2x of the current cached size.
RenderOptions.SetCacheInvalidationThresholdMinimum(drawingBrush, 0.5);
RenderOptions.SetCacheInvalidationThresholdMaximum(drawingBrush, 2.0);
Dim drawingBrush As New DrawingBrush()
' Set the caching hint option for the brush.
RenderOptions.SetCachingHint(drawingBrush, CachingHint.Cache)
' Set the minimum and maximum relative sizes for regenerating the tiled brush.
' The tiled brush will be regenerated and re-cached when its size is
' 0.5x or 2x of the current cached size.
RenderOptions.SetCacheInvalidationThresholdMinimum(drawingBrush, 0.5)
RenderOptions.SetCacheInvalidationThresholdMaximum(drawingBrush, 2.0)
注解
使用此方法在代码中设置 CacheInvalidationThresholdMinimum 附加属性。
