FileInformation.OpenAsync 方法

定义

命名空间:

Windows.Storage.BulkAccess

重载

OpenAsync(FileAccessMode)	在指定文件上打开具有指定选项的随机访问流。
OpenAsync(FileAccessMode, StorageOpenOptions)	在指定文件上打开具有指定选项的随机访问流。

OpenAsync(FileAccessMode)

在指定文件上打开具有指定选项的随机访问流。

public:
 virtual IAsyncOperation<IRandomAccessStream ^> ^ OpenAsync(FileAccessMode accessMode) = OpenAsync;

/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<IRandomAccessStream> OpenAsync(FileAccessMode const& accessMode);

[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<IRandomAccessStream> OpenAsync(FileAccessMode accessMode);

function openAsync(accessMode)

Public Function OpenAsync (accessMode As FileAccessMode) As IAsyncOperation(Of IRandomAccessStream)

参数

accessMode

FileAccessMode

指定要允许的访问类型的枚举值之一。

返回

IAsyncOperation<IRandomAccessStream>

此方法完成后，它将返回一个 IRandomAccessStream ，其中包含请求的随机访问流。

实现

OpenAsync(FileAccessMode)

属性

RemoteAsyncAttribute

另请参阅

• OpenAsync(FileAccessMode, StorageOpenOptions)

OpenAsync(FileAccessMode, StorageOpenOptions)

在指定文件上打开具有指定选项的随机访问流。

public:
 virtual IAsyncOperation<IRandomAccessStream ^> ^ OpenAsync(FileAccessMode accessMode, StorageOpenOptions options) = OpenAsync;

/// [Windows.Foundation.Metadata.Overload("OpenWithOptionsAsync")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<IRandomAccessStream> OpenAsync(FileAccessMode const& accessMode, StorageOpenOptions const& options);

[Windows.Foundation.Metadata.Overload("OpenWithOptionsAsync")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<IRandomAccessStream> OpenAsync(FileAccessMode accessMode, StorageOpenOptions options);

function openAsync(accessMode, options)

Public Function OpenAsync (accessMode As FileAccessMode, options As StorageOpenOptions) As IAsyncOperation(Of IRandomAccessStream)

参数

accessMode

FileAccessMode

指定要允许的访问类型的枚举值之一。

options

StorageOpenOptions

枚举值的按位组合，指定用于打开流的选项。

返回

IAsyncOperation<IRandomAccessStream>

此方法完成后，它将返回一个 IRandomAccessStream ，其中包含请求的随机访问流。

实现

OpenAsync(FileAccessMode, StorageOpenOptions)

属性

OverloadAttribute RemoteAsyncAttribute

另请参阅

• OpenAsync(FileAccessMode)