CloudAppendBlob.UploadFromFileAsync Method (String, FileMode, CancellationToken)

Initiates an asynchronous operation to upload a file to an append blob. If the blob already exists, it will be overwritten. Recommended only for single-writer scenarios.

Namespace:   Microsoft.WindowsAzure.Storage.Blob
Assembly:  Microsoft.WindowsAzure.Storage (in Microsoft.WindowsAzure.Storage.dll)

Syntax

[DoesServiceRequestAttribute]
public Task UploadFromFileAsync(
    string path,
    FileMode mode,
    CancellationToken cancellationToken
)

<DoesServiceRequestAttribute>
Public Function UploadFromFileAsync (
    path As String,
    mode As FileMode,
    cancellationToken As CancellationToken
) As Task

Parameters

• path
  Type: System.String

  A string containing the file path providing the blob content.

• mode
  Type: System.IO.FileMode

  A FileMode enumeration value that specifies how to open the file.

• cancellationToken
  Type: System.Threading.CancellationToken

  A CancellationToken to observe while waiting for a task to complete.

Return Value

Type: System.Threading.Tasks.Task

A Task object that represents the asynchronous operation.

Implements

ICloudBlob.UploadFromFileAsync(String, FileMode, CancellationToken)

Remarks

Use this method only in single-writer scenarios. Internally, this method uses the append-offset conditional header to avoid duplicate blocks, which may cause problems in multiple-writer scenarios. To append data to an append blob that already exists, see AppendFromFileAsync.

See Also

UploadFromFileAsync Overload
CloudAppendBlob Class
Microsoft.WindowsAzure.Storage.Blob Namespace

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