FileRandomAccessStream.OpenAsync 方法

参考

定义

命名空间:: Windows.Storage.Streams

重要

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重载

OpenAsync(String, FileAccessMode)	在给定文件路径的情况下打开指向现有文件的流。
OpenAsync(String, FileAccessMode, StorageOpenOptions, FileOpenDisposition)	在给定文件路径的情况下打开指向文件的流。如果该文件不存在，可以使用 FileOpenDisposition 创建它。

OpenAsync(String, FileAccessMode)

编辑

在给定文件路径的情况下打开指向现有文件的流。

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)

参数

filePath: String
Platform::String

winrt::hstring

要打开的文件的路径。

accessMode: FileAccessMode

用于打开流的权限级别。

IAsyncOperation<IRandomAccessStream>

流式传输到指定文件。

属性: OverloadAttribute RemoteAsyncAttribute

Windows 要求

设备系列	Windows 10 Fall Creators Update (在 10.0.16299.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v5.0 中引入)

适用于

OpenAsync(String, FileAccessMode, StorageOpenOptions, FileOpenDisposition)

编辑

在给定文件路径的情况下打开指向文件的流。如果该文件不存在，可以使用 FileOpenDisposition 创建它。

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)