FileInformation.GetThumbnailAsync 方法

定义

命名空间:

Windows.Storage.BulkAccess

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

IAsyncOperation<StorageItemThumbnail>

此方法成功完成后，它将以 StorageItemThumbnail 对象的形式返回缩略图。

实现

GetThumbnailAsync(ThumbnailMode)

属性

OverloadAttribute RemoteAsyncAttribute

另请参阅

• GetThumbnailAsync(ThumbnailMode, UInt32)
• GetThumbnailAsync(ThumbnailMode, UInt32, ThumbnailOptions)

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

IAsyncOperation<StorageItemThumbnail>

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

OverloadAttribute RemoteAsyncAttribute

另请参阅

• GetThumbnailAsync(ThumbnailMode)
• GetThumbnailAsync(ThumbnailMode, UInt32, ThumbnailOptions)

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

IAsyncOperation<StorageItemThumbnail>

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

OverloadAttribute RemoteAsyncAttribute

另请参阅

• GetThumbnailAsync(ThumbnailMode)
• GetThumbnailAsync(ThumbnailMode, UInt32)