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CloudBlockBlob.OpenWrite Method

Updated: October 23, 2013

[This topic is part of the Windows Azure Storage Client Library 2.1. The current recommended version is Storage Client Library 3.0.]

Opens a stream for writing to the blob.

Namespace: Microsoft.WindowsAzure.Storage.Blob
Assembly: Microsoft.WindowsAzure.Storage (in Microsoft.WindowsAzure.Storage.dll)
Dim instance As CloudBlockBlob
Dim accessCondition As AccessCondition
Dim options As BlobRequestOptions
Dim operationContext As OperationContext
Dim returnValue As CloudBlobStream

returnValue = instance.OpenWrite(accessCondition, options, operationContext)
Public Function OpenWrite ( _
	<OptionalAttribute> Optional accessCondition As AccessCondition = Nothing, _
	<OptionalAttribute> Optional options As BlobRequestOptions = Nothing, _
	<OptionalAttribute> Optional operationContext As OperationContext = Nothing _
) As CloudBlobStream



An AccessCondition object that represents the access conditions for the blob. If null, no condition is used.


A BlobRequestOptions object that specifies any additional options for the request.


An OperationContext object that represents the context for the current operation.

Return Value

A stream to be used for writing to the blob.

The OpenWrite method will overwrite an existing blob unless explicitly prevented using the accessCondition parameter.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Development Platforms

Windows Vista, Windows 7 and Windows Server 2008


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