Question

I am working with Block Blobs in Azure Storage. I need to get uncommitted blocks, as far as I have found I need to call “Get Block List”. Here is the problem.

Does “Get Block List” functionality exists in C# (Microsoft.WindowsAzure.StorageClient.dll)?

MSDN only says about doing a HTTP request, not a word about StorageClient API.

If this function does not exists in C#, are there any plans to include it to the C# API?

Answer 1

I think what you are looking for is the DownloadBlockList method on CloudBlockBlob
http://msdn.microsoft.com/en-us/library/microsoft.windowsazure.storageclient.cloudblockblob.downloadblocklist.aspx

There’s example code there in MSDN – http://msdn.microsoft.com/en-us/library/ee772860.aspx

static void DownloadBlockListForBlob(Uri blobEndpoint, string accountName, string accountKey)
{
    //Create service client for credentialed access to the Blob service, using development storage.
    CloudBlobClient blobClient = new CloudBlobClient(blobEndpoint, new StorageCredentialsAccountAndKey(accountName, accountKey)); 

    //Get a reference to a block blob.
    CloudBlockBlob blockBlob = blobClient.GetBlockBlobReference("mycontainer/mybinaryblob.mp3");

    //Download the committed blocks in the block list.
    foreach (var blockListItem in blockBlob.DownloadBlockList())
    {
        Console.WriteLine("Block ID: " + blockListItem.Name);
        Console.WriteLine("Block size: " + blockListItem.Size);
        Console.WriteLine("Is block committed?: " + blockListItem.Committed);
        Console.WriteLine();
    }

    //Download only uncommitted blocks.
    foreach (var blockListItem in blockBlob.DownloadBlockList(BlockListingFilter.Uncommitted))
    {
        Console.WriteLine("Block ID: " + blockListItem.Name);
        Console.WriteLine("Block size: " + blockListItem.Size);
        Console.WriteLine("Is block committed?: " + blockListItem.Committed);
        Console.WriteLine();
    }

    //Download all blocks.
    foreach (var blockListItem in blockBlob.DownloadBlockList(BlockListingFilter.All))
    {
        Console.WriteLine("Block ID: " + blockListItem.Name);
        Console.WriteLine("Block size: " + blockListItem.Size);
        Console.WriteLine("Is block committed?: " + blockListItem.Committed);
        Console.WriteLine();
    }
}