CloudBlockBlob.BeginOpenWrite Method (AccessCondition, BlobRequestOptions, OperationContext, AsyncCallback, Object) (Microsoft.WindowsAzure.Storage.Blob)

From Microsoft Windows Azure Storage Blob

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Begins an asynchronous operation to open a stream for writing to the blob.

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

Syntax

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[DoesServiceRequestAttribute]
public virtual ICancellableAsyncResult BeginOpenWrite(
	AccessCondition accessCondition,
	BlobRequestOptions options,
	OperationContext operationContext,
	AsyncCallback callback,
	object state
)

C++

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public:
[DoesServiceRequestAttribute]
virtual ICancellableAsyncResult^ BeginOpenWrite(
	AccessCondition^ accessCondition,
	BlobRequestOptions^ options,
	OperationContext^ operationContext,
	AsyncCallback^ callback,
	Object^ state
)

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[<DoesServiceRequestAttribute>]
abstract BeginOpenWrite : 
        accessCondition:AccessCondition *
        options:BlobRequestOptions *
        operationContext:OperationContext *
        callback:AsyncCallback *
        state:Object -> ICancellableAsyncResult
[<DoesServiceRequestAttribute>]
override BeginOpenWrite : 
        accessCondition:AccessCondition *
        options:BlobRequestOptions *
        operationContext:OperationContext *
        callback:AsyncCallback *
        state:Object -> ICancellableAsyncResult

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<DoesServiceRequestAttribute>
Public Overridable Function BeginOpenWrite (
	accessCondition As AccessCondition,
	options As BlobRequestOptions,
	operationContext As OperationContext,
	callback As AsyncCallback,
	state As Object
) As ICancellableAsyncResult

Parameters

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.

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.

Remarks

Note that this method always makes a call to the Referenced topic 'f0024a27-8638-4896-b409-ebc8fe9366af' is not in the TOC. method under the covers.

Set the StreamWriteSizeInBytesStreamWriteSizeInBytesStreamWriteSizeInBytesStreamWriteSizeInBytes property before calling this method to specify the block size to write, in bytes, ranging from between 16 KB and 4 MB inclusive.

CloudBlockBlob.BeginOpenWrite Method (AccessCondition, BlobRequestOptions, OperationContext, AsyncCallback, Object) (Microsoft.WindowsAzure.Storage.Blob)

Syntax

Parameters

Return Value

Remarks

See Also