CloudBlockBlob.BeginDownloadBlockList Method (BlockListingFilter, AccessCondition, BlobRequestOptions, OperationContext, AsyncCallback, Object)
Assembly: Microsoft.WindowsAzure.Storage (in Microsoft.WindowsAzure.Storage.dll)
'Usage Dim instance As CloudBlockBlob Dim blockListingFilter As BlockListingFilter Dim accessCondition As AccessCondition Dim options As BlobRequestOptions Dim operationContext As OperationContext Dim callback As AsyncCallback Dim state As Object Dim returnValue As ICancellableAsyncResult returnValue = instance.BeginDownloadBlockList(blockListingFilter, accessCondition, options, operationContext, callback, state)
[DoesServiceRequest] public ICancellableAsyncResult BeginDownloadBlockList ( BlockListingFilter blockListingFilter, AccessCondition accessCondition, BlobRequestOptions options, OperationContext operationContext, AsyncCallback callback, Object state )
/** @attribute DoesServiceRequest() */ public ICancellableAsyncResult BeginDownloadBlockList ( BlockListingFilter blockListingFilter, AccessCondition accessCondition, BlobRequestOptions options, OperationContext operationContext, AsyncCallback callback, Object state )
DoesServiceRequest public function BeginDownloadBlockList ( blockListingFilter : BlockListingFilter, accessCondition : AccessCondition, options : BlobRequestOptions, operationContext : OperationContext, callback : AsyncCallback, state : Object ) : ICancellableAsyncResult
One of the enumeration values that indicates whether to return committed blocks, uncommitted blocks, or both.
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.
The callback delegate that will receive notification when the asynchronous operation completes.
A user-defined object that will be passed to the callback delegate.
Return ValueAn ICancellableAsyncResult that references the asynchronous operation.
The BeginDownloadBlockList method begins an operation to download the block list for the blob, using the specified block listing filter. The block listing filter specifies whether to include only committed blobs, only uncommitted blobs, or both.
The committed block list includes the list of blocks that have been successfully committed to a blob. The list of committed blocks is returned in the same order that they were committed to the blob.
You can use the uncommitted block list to determine which blocks are missing from the blob in cases where either writing a block or committing the block list has failed. The list of uncommitted blocks is returned beginning with the most recently uploaded block to the oldest uploaded block. If a block ID has been uploaded more than once, only the most recently uploaded block appears in the list.
Development PlatformsWindows Vista, Windows 7 and Windows Server 2008