CloudBlockBlob.BeginDownloadBlockList Method (AsyncCallback, Object)
Updated: October 23, 2013
Begins an asynchronous operation to return an enumerable collection of the blob's blocks, using the specified block list filter. Namespace: Microsoft.WindowsAzure.Storage.Blob
Assembly: Microsoft.WindowsAzure.Storage (in Microsoft.WindowsAzure.Storage.dll)
[DoesServiceRequest] public ICancellableAsyncResult BeginDownloadBlockList ( AsyncCallback callback, Object state )
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