FileSystemOperationsExtensions.OpenAsync Method
Definition
Important
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Opens and reads from the specified file.
public static System.Threading.Tasks.Task<System.IO.Stream> OpenAsync (this Microsoft.Azure.Management.DataLake.Store.IFileSystemOperations operations, string accountName, string directFilePath, long? length = default, long? offset = default, Guid? fileSessionId = default, System.Threading.CancellationToken cancellationToken = default);public static System.Threading.Tasks.Task<System.IO.Stream> OpenAsync (this Microsoft.Azure.Management.DataLake.Store.IFileSystemOperations operations, string accountName, string path, long? length = default, long? offset = default, Guid? fileSessionId = default, System.Threading.CancellationToken cancellationToken = default);static member OpenAsync : Microsoft.Azure.Management.DataLake.Store.IFileSystemOperations * string * string * Nullable<int64> * Nullable<int64> * Nullable<Guid> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<System.IO.Stream>static member OpenAsync : Microsoft.Azure.Management.DataLake.Store.IFileSystemOperations * string * string * Nullable<int64> * Nullable<int64> * Nullable<Guid> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<System.IO.Stream><Extension()>
Public Function OpenAsync (operations As IFileSystemOperations, accountName As String, directFilePath As String, Optional length As Nullable(Of Long) = Nothing, Optional offset As Nullable(Of Long) = Nothing, Optional fileSessionId As Nullable(Of Guid) = Nothing, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Stream)<Extension()>
Public Function OpenAsync (operations As IFileSystemOperations, accountName As String, path As String, Optional length As Nullable(Of Long) = Nothing, Optional offset As Nullable(Of Long) = Nothing, Optional fileSessionId As Nullable(Of Guid) = Nothing, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Stream)Parameters
- operations
- IFileSystemOperations
The operations group for this extension method.
- accountName
- String
The Azure Data Lake Store account to execute filesystem operations on.
- directFilePathpath
- String
The Data Lake Store path (starting with '/') of the file to open.
The number of bytes that the server will attempt to retrieve. It will retrieve <= length bytes.
Optional unique GUID per file indicating all the reads with the same fileSessionId are from the same client and same session. This will give a performance benefit.
- cancellationToken
- CancellationToken
The cancellation token.
Returns
Applies to
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Azure SDK for .NET