FileInformation.GetThumbnailAsync 方法
定义
重要
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重载
| GetThumbnailAsync(ThumbnailMode) |
检索与 StorageFile 关联的缩略图。 |
| GetThumbnailAsync(ThumbnailMode, UInt32) |
检索与 StorageFile 关联的缩略图，并将其缩放到指定大小。 |
| GetThumbnailAsync(ThumbnailMode, UInt32, ThumbnailOptions) |
根据指定的选项检索与 StorageFile 关联的缩略图。 |
GetThumbnailAsync(ThumbnailMode)
检索与 StorageFile 关联的缩略图。
public:
virtual IAsyncOperation<StorageItemThumbnail ^> ^ GetThumbnailAsync(ThumbnailMode mode) = GetThumbnailAsync;/// [Windows.Foundation.Metadata.Overload("GetThumbnailAsyncOverloadDefaultSizeDefaultOptions")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<StorageItemThumbnail> GetThumbnailAsync(ThumbnailMode const& mode);[Windows.Foundation.Metadata.Overload("GetThumbnailAsyncOverloadDefaultSizeDefaultOptions")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<StorageItemThumbnail> GetThumbnailAsync(ThumbnailMode mode);function getThumbnailAsync(mode)Public Function GetThumbnailAsync (mode As ThumbnailMode) As IAsyncOperation(Of StorageItemThumbnail)参数
- mode
- ThumbnailMode
要检索的缩略图模式。
返回
此方法成功完成后，它将以 StorageItemThumbnail 对象的形式返回缩略图。
实现
- 属性
另请参阅
适用于
GetThumbnailAsync(ThumbnailMode, UInt32)
检索与 StorageFile 关联的缩略图，并将其缩放到指定大小。
public:
virtual IAsyncOperation<StorageItemThumbnail ^> ^ GetThumbnailAsync(ThumbnailMode mode, unsigned int requestedSize) = GetThumbnailAsync;/// [Windows.Foundation.Metadata.Overload("GetThumbnailAsyncOverloadDefaultOptions")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<StorageItemThumbnail> GetThumbnailAsync(ThumbnailMode const& mode, uint32_t const& requestedSize);[Windows.Foundation.Metadata.Overload("GetThumbnailAsyncOverloadDefaultOptions")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<StorageItemThumbnail> GetThumbnailAsync(ThumbnailMode mode, uint requestedSize);function getThumbnailAsync(mode, requestedSize)Public Function GetThumbnailAsync (mode As ThumbnailMode, requestedSize As UInteger) As IAsyncOperation(Of StorageItemThumbnail)参数
- mode
- ThumbnailMode
要检索的缩略图模式。
- requestedSize
-
UInt32
unsigned int
uint32_t
要检索的请求大小（以缩略图像素为单位）。
返回
此方法成功完成后，它将以 StorageItemThumbnail 对象的形式返回缩略图。
实现
M:Windows.Storage.IStorageItemProperties.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode,System.UInt32)
M:Windows.Storage.IStorageItemProperties.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode,unsigned int)
M:Windows.Storage.IStorageItemProperties.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode,uint32_t)
- 属性
另请参阅
适用于
GetThumbnailAsync(ThumbnailMode, UInt32, ThumbnailOptions)
根据指定的选项检索与 StorageFile 关联的缩略图。
public:
virtual IAsyncOperation<StorageItemThumbnail ^> ^ GetThumbnailAsync(ThumbnailMode mode, unsigned int requestedSize, ThumbnailOptions options) = GetThumbnailAsync;/// [Windows.Foundation.Metadata.Overload("GetThumbnailAsync")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<StorageItemThumbnail> GetThumbnailAsync(ThumbnailMode const& mode, uint32_t const& requestedSize, ThumbnailOptions const& options);[Windows.Foundation.Metadata.Overload("GetThumbnailAsync")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<StorageItemThumbnail> GetThumbnailAsync(ThumbnailMode mode, uint requestedSize, ThumbnailOptions options);function getThumbnailAsync(mode, requestedSize, options)Public Function GetThumbnailAsync (mode As ThumbnailMode, requestedSize As UInteger, options As ThumbnailOptions) As IAsyncOperation(Of StorageItemThumbnail)参数
- mode
- ThumbnailMode
要检索的缩略图模式。
- requestedSize
-
UInt32
unsigned int
uint32_t
要检索的请求大小（以缩略图像素为单位）。
- options
- ThumbnailOptions
缩略图检索选项。
返回
此方法成功完成后，它将以 StorageItemThumbnail 对象的形式返回缩略图。
实现
M:Windows.Storage.IStorageItemProperties.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode,System.UInt32,Windows.Storage.FileProperties.ThumbnailOptions)
M:Windows.Storage.IStorageItemProperties.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode,unsigned int,Windows.Storage.FileProperties.ThumbnailOptions)
M:Windows.Storage.IStorageItemProperties.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode,uint32_t,Windows.Storage.FileProperties.ThumbnailOptions)
- 属性