Storage Client Library for Windows Phone (Version 7.0)

Initiates an asynchronous operation to write pages to a page 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 WritePagesAsync(
	Stream pageData,
	long startOffset,
	string contentMD5,
	CancellationToken cancellationToken
)

C++

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public:
[DoesServiceRequestAttribute]
virtual Task^ WritePagesAsync(
	Stream^ pageData,
	long long startOffset,
	String^ contentMD5,
	CancellationToken cancellationToken
)

F#

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[<DoesServiceRequestAttribute>]
abstract WritePagesAsync : 
        pageData:Stream *
        startOffset:int64 *
        contentMD5:string *
        cancellationToken:CancellationToken -> Task
[<DoesServiceRequestAttribute>]
override WritePagesAsync : 
        pageData:Stream *
        startOffset:int64 *
        contentMD5:string *
        cancellationToken:CancellationToken -> Task

VB

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<DoesServiceRequestAttribute>
Public Overridable Function WritePagesAsync (
	pageData As Stream,
	startOffset As Long,
	contentMD5 As String,
	cancellationToken As CancellationToken
) As Task

Parameters

pageData

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

A Stream object providing the page data.

startOffset

Type: System.Int64System::Int64System.Int64System.Int64

The offset at which to begin writing, in bytes. The offset must be a multiple of 512.

contentMD5

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

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

cancellationToken

Type: System.Threading.CancellationTokenSystem.Threading::CancellationTokenSystem.Threading.CancellationTokenSystem.Threading.CancellationToken

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

Return Value

Type: System.Threading.Tasks.TaskSystem.Threading.Tasks::Task^System.Threading.Tasks.TaskSystem.Threading.Tasks.Task

A Task object that represents the asynchronous operation.

Remarks

Clients may send the Content-MD5 header for a given Write Pages 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: 2ce5402d-f64d-4bfb-9ca4-feeb4693de22, 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

WritePagesAsync Overload
CloudPageBlob Class
Microsoft.WindowsAzure.Storage.Blob Namespace

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