Storage Client Library for Windows Phone (Version 7.0)

Initiates an asynchronous operation to commit a new block of data to the end of the blob.

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

Syntax

C#

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[DoesServiceRequestAttribute]
public virtual Task<long> AppendBlockAsync(
	Stream blockData,
	string contentMD5,
	AccessCondition accessCondition,
	BlobRequestOptions options,
	OperationContext operationContext
)

C++

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public:
[DoesServiceRequestAttribute]
virtual Task<long long>^ AppendBlockAsync(
	Stream^ blockData,
	String^ contentMD5,
	AccessCondition^ accessCondition,
	BlobRequestOptions^ options,
	OperationContext^ operationContext
)

F#

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[<DoesServiceRequestAttribute>]
abstract AppendBlockAsync : 
        blockData:Stream *
        contentMD5:string *
        accessCondition:AccessCondition *
        options:BlobRequestOptions *
        operationContext:OperationContext -> Task<int64>
[<DoesServiceRequestAttribute>]
override AppendBlockAsync : 
        blockData:Stream *
        contentMD5:string *
        accessCondition:AccessCondition *
        options:BlobRequestOptions *
        operationContext:OperationContext -> Task<int64>

VB

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<DoesServiceRequestAttribute>
Public Overridable Function AppendBlockAsync (
	blockData As Stream,
	contentMD5 As String,
	accessCondition As AccessCondition,
	options As BlobRequestOptions,
	operationContext As OperationContext
) As Task(Of Long)

Parameters

blockData

Type: System.IO.StreamSystem.IO::Stream^System.IO.StreamSystem.IO.Stream

A Stream object that provides the data for the block.

contentMD5

Type: System.StringSystem::String^System.StringSystem.String

An optional hash value used to ensure transactional integrity for the block. May be null or an empty string.

accessCondition

Type: Microsoft.WindowsAzure.Storage.AccessConditionMicrosoft.WindowsAzure.Storage::AccessCondition^Microsoft.WindowsAzure.Storage.AccessConditionMicrosoft.WindowsAzure.Storage.AccessCondition

An AccessCondition object that represents the condition that must be met in order for the request to proceed. If null, no condition is used.

options

Type: Microsoft.WindowsAzure.Storage.Blob.BlobRequestOptionsMicrosoft.WindowsAzure.Storage.Blob::BlobRequestOptions^Microsoft.WindowsAzure.Storage.Blob.BlobRequestOptionsMicrosoft.WindowsAzure.Storage.Blob.BlobRequestOptions

A BlobRequestOptions object that specifies additional options for the request.

operationContext

Type: Microsoft.WindowsAzure.Storage.OperationContextMicrosoft.WindowsAzure.Storage::OperationContext^Microsoft.WindowsAzure.Storage.OperationContextMicrosoft.WindowsAzure.Storage.OperationContext

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

Return Value

Type: System.Threading.Tasks.Task<Int64>System.Threading.Tasks::Task<Int64>^System.Threading.Tasks.Task<Int64>System.Threading.Tasks.Task(Of Int64)

A Task object that represents the asynchronous operation.

Remarks

Clients may send the Content-MD5 header for a given Append Block operation as a means to ensure transactional integrity over the wire. The contentMD5 parameter permits clients who already have access to a pre-computed MD5 value for a given byte range to provide it. If the P:BlobRequestOptions.UseTransactionalMd5Referenced topic's target id should not be empty. Article id: 2ed7eb05-d99d-496c-b7c8-f74edb7181b9, link: P:BlobRequestOptions.UseTransactionalMd5. property is set to true and the contentMD5 parameter is set to null, then the client library will calculate the MD5 value internally.

See Also

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

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