Storage Client Library for Windows Phone (Version 7.0)

Begins an asynchronous operation to upload a stream 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

C#

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[DoesServiceRequestAttribute]
public virtual ICancellableAsyncResult BeginUploadFromStream(
	Stream source,
	long length,
	AsyncCallback callback,
	object state
)

C++

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public:
[DoesServiceRequestAttribute]
virtual ICancellableAsyncResult^ BeginUploadFromStream(
	Stream^ source,
	long long length,
	AsyncCallback^ callback,
	Object^ state
)

F#

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[<DoesServiceRequestAttribute>]
abstract BeginUploadFromStream : 
        source:Stream *
        length:int64 *
        callback:AsyncCallback *
        state:Object -> ICancellableAsyncResult
[<DoesServiceRequestAttribute>]
override BeginUploadFromStream : 
        source:Stream *
        length:int64 *
        callback:AsyncCallback *
        state:Object -> ICancellableAsyncResult

VB

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<DoesServiceRequestAttribute>
Public Overridable Function BeginUploadFromStream (
	source As Stream,
	length As Long,
	callback As AsyncCallback,
	state As Object
) As ICancellableAsyncResult

Parameters

source

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

A Stream object providing the blob content.

length

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

Specifies the number of bytes from the Stream source to upload from the start position.

callback

Type: System.AsyncCallbackSystem::AsyncCallback^System.AsyncCallbackSystem.AsyncCallback

An AsyncCallback delegate that will receive notification when the asynchronous operation completes.

state

Type: System.ObjectSystem::Object^System.ObjectSystem.Object

A user-defined object that will be passed to the callback delegate.

Return Value

Type: Microsoft.WindowsAzure.Storage.ICancellableAsyncResultMicrosoft.WindowsAzure.Storage::ICancellableAsyncResult^Microsoft.WindowsAzure.Storage.ICancellableAsyncResultMicrosoft.WindowsAzure.Storage.ICancellableAsyncResult

An ICancellableAsyncResult that references the asynchronous operation.

Implements

ICloudBlob.::..BeginUploadFromStream(Stream, Int64, AsyncCallback, Object)(Stream^, Int64, AsyncCallback^, Object^)(Stream, Int64, AsyncCallback, Object)(Stream, Int64, AsyncCallback, Object)

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. If you have a single-writer scenario, see AbsorbConditionalErrorsOnRetryAbsorbConditionalErrorsOnRetryAbsorbConditionalErrorsOnRetryAbsorbConditionalErrorsOnRetry to determine whether setting this flag to true is acceptable for your scenario. To append data to an append blob that already exists, see BeginAppendFromStream.

See Also

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

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