BitmapCache 类

定义

表示将可视元素或元素树缓存为位图图面的行为。

public ref class BitmapCache sealed : CacheMode
/// [Windows.Foundation.Metadata.Activatable(65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class BitmapCache final : CacheMode
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class BitmapCache final : CacheMode
[Windows.Foundation.Metadata.Activatable(65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class BitmapCache : CacheMode
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class BitmapCache : CacheMode
Public NotInheritable Class BitmapCache
Inherits CacheMode
继承
Object Platform::Object IInspectable DependencyObject CacheMode BitmapCache
属性

Windows 要求

设备系列
Windows 10 (在 10.0.10240.0 中引入)
API contract
Windows.Foundation.UniversalApiContract (在 v1.0 中引入)

示例

使用这些语法形式中的任何一种,将 UIElement.CacheMode 设置为 null 默认值以外的值。 请勿在没有首先测试的情况下定期执行此操作,请参阅 UIElement.CacheMode 中的“备注”。

<Canvas CacheMode="BitmapCache">
  ...
</Canvas>
canvas1.CacheMode = new BitmapCache(); //canvas1 is an existing named element in UI
// <Canvas x:Name="canvas1"/>
#include <winrt/Windows.UI.Xaml.Media.h>
...
canvas1().CacheMode(Windows::UI::Xaml::Media::BitmapCache{});
canvas1->CacheMode = ref new BitmapCache(); //canvas1 is an existing named element in UI

注解

此类是基础结构,在 XAML 标记中指定 CacheMode="BitmapCache" 时提供行为的基础运行时值,或者在代码中创建新的 BitmapCache 以设置 UIElement.CacheMode

构造函数

BitmapCache()

初始化 BitmapCache 类的新实例。

属性

Dispatcher

获取与此 对象关联的 CoreDispatcherCoreDispatcher 表示可以访问 UI 线程上的 DependencyObject 的工具,即使代码是由非 UI 线程启动的。

(继承自 DependencyObject)

方法

ClearValue(DependencyProperty)

清除依赖属性的本地值。

(继承自 DependencyObject)
GetAnimationBaseValue(DependencyProperty)

返回为依赖属性建立的任何基值,该基值适用于动画未处于活动状态的情况。

(继承自 DependencyObject)
GetValue(DependencyProperty)

DependencyObject 返回依赖属性的当前有效值。

(继承自 DependencyObject)
ReadLocalValue(DependencyProperty)

如果设置了本地值,则返回依赖属性的本地值。

(继承自 DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)

注册一个通知函数,用于侦听此 DependencyObject 实例上特定 DependencyProperty 的更改。

(继承自 DependencyObject)
SetValue(DependencyProperty, Object)

设置 DependencyObject 上依赖属性的本地值。

(继承自 DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)

取消以前通过调用 RegisterPropertyChangedCallback 注册的更改通知。

(继承自 DependencyObject)

适用于

另请参阅