FileRandomAccessStream.OpenAsync 方法

定義

命名空間:

Windows.Storage.Streams

多載

OpenAsync(String, FileAccessMode)	根據檔案的路徑，開啟現有檔案的資料流程。
OpenAsync(String, FileAccessMode, StorageOpenOptions, FileOpenDisposition)	在指定的檔案路徑下，開啟檔案的資料流程。 如果檔案不存在，可以使用 FileOpenDisposition 建立檔案。

OpenAsync(String, FileAccessMode)

根據檔案的路徑，開啟現有檔案的資料流程。

public:
 static IAsyncOperation<IRandomAccessStream ^> ^ OpenAsync(Platform::String ^ filePath, FileAccessMode accessMode);

/// [Windows.Foundation.Metadata.Overload("OpenAsync")]
/// [Windows.Foundation.Metadata.RemoteAsync]
 static IAsyncOperation<IRandomAccessStream> OpenAsync(winrt::hstring const& filePath, FileAccessMode const& accessMode);

[Windows.Foundation.Metadata.Overload("OpenAsync")]
[Windows.Foundation.Metadata.RemoteAsync]
public static IAsyncOperation<IRandomAccessStream> OpenAsync(string filePath, FileAccessMode accessMode);

function openAsync(filePath, accessMode)

Public Shared Function OpenAsync (filePath As String, accessMode As FileAccessMode) As IAsyncOperation(Of IRandomAccessStream)

參數

filePath

String

Platform::String

winrt::hstring

要開啟之檔案的路徑。

accessMode

FileAccessMode

用來開啟資料流程的許可權層級。

傳回

IAsyncOperation<IRandomAccessStream>

指定檔案的資料流程。

屬性

OverloadAttribute RemoteAsyncAttribute

Windows 需求

裝置系列	Windows 10 Fall Creators Update (已於 10.0.16299.0 引進)
API contract	Windows.Foundation.UniversalApiContract (已於 v5.0 引進)

OpenAsync(String, FileAccessMode, StorageOpenOptions, FileOpenDisposition)

在指定的檔案路徑下，開啟檔案的資料流程。 如果檔案不存在，可以使用 FileOpenDisposition 建立檔案。

public:
 static IAsyncOperation<IRandomAccessStream ^> ^ OpenAsync(Platform::String ^ filePath, FileAccessMode accessMode, StorageOpenOptions sharingOptions, FileOpenDisposition openDisposition);

/// [Windows.Foundation.Metadata.Overload("OpenWithOptionsAsync")]
/// [Windows.Foundation.Metadata.RemoteAsync]
 static IAsyncOperation<IRandomAccessStream> OpenAsync(winrt::hstring const& filePath, FileAccessMode const& accessMode, StorageOpenOptions const& sharingOptions, FileOpenDisposition const& openDisposition);

[Windows.Foundation.Metadata.Overload("OpenWithOptionsAsync")]
[Windows.Foundation.Metadata.RemoteAsync]
public static IAsyncOperation<IRandomAccessStream> OpenAsync(string filePath, FileAccessMode accessMode, StorageOpenOptions sharingOptions, FileOpenDisposition openDisposition);

function openAsync(filePath, accessMode, sharingOptions, openDisposition)

Public Shared Function OpenAsync (filePath As String, accessMode As FileAccessMode, sharingOptions As StorageOpenOptions, openDisposition As FileOpenDisposition) As IAsyncOperation(Of IRandomAccessStream)

參數

filePath

String

Platform::String

winrt::hstring

要開啟之檔案的路徑。

accessMode

FileAccessMode

用來開啟資料流程的許可權層級。

sharingOptions

StorageOpenOptions

列舉值的位元組合，指定開啟資料流程的選項。

openDisposition

FileOpenDisposition

要對檔案採取的動作。

傳回

IAsyncOperation<IRandomAccessStream>

指定檔案的資料流程。

屬性

OverloadAttribute RemoteAsyncAttribute

Windows 需求

裝置系列	Windows 10 Fall Creators Update (已於 10.0.16299.0 引進)
API contract	Windows.Foundation.UniversalApiContract (已於 v5.0 引進)