azure-storage - 能否从 Azure block Blob 下载特定 block ？

Question

如果知道 block ID，是否可以从 Azure block Blob 下载特定 block ？

Answer 1

是的，你绝对可以，这是一个如何下载第一个 block 的例子:

var storageAccount = CloudStorageAccount.Parse("DefaultEndpointsProtocol=https;AccountName=...;AccountKey=...;EndpointSuffix=core.windows.net");

CloudBlobClient serviceClient = storageAccount.CreateCloudBlobClient();

var container = serviceClient.GetContainerReference("containerName");

var blockBlob = container.GetBlockBlobReference("blobName");

var blocklist = await blockBlob.DownloadBlockListAsync();

var firstBlock = blocklist.First();

var memStream = new MemoryStream();

await blockBlob.DownloadRangeToStreamAsync(memStream, 0, firstBlock.Length);

string contents;

using (var streamReader = new StreamReader(memStream))
{
    contents = await streamReader.ReadToEndAsync();
}

你需要一些来自 nuget 的包:

Microsoft.WindowsAzure.Storage
Microsoft.WindowsAzure.Storage.Blob