How do I save byte arrays i.e. byte[] to Azure Blob Storage?

Question

I know how to save Streams, but I want to take that stream and create thumbnails and other sized images, but I don't know how to save a byte[] to the Azure Blob Storage.

This is what I'm doing now to save the Stream:

 // Retrieve reference to a blob named "myblob".
        CloudBlockBlob _blockBlob = container.GetBlockBlobReference("SampleImage.jpg");

        // upload from Stream object during file upload
        blockBlob.UploadFromStream(stream);

        // But what about pushing a byte[] array?  I want to thumbnail and do some image manipulation

Answer 1

This used to be in the Storage Client library (version 1.7 for sure) - but they removed it in version 2.0

"All upload and download methods are now stream based, the FromFile, ByteArray, Text overloads have been removed."

http://blogs.msdn.com/b/windowsazurestorage/archive/2012/10/29/windows-azure-storage-client-library-2-0-breaking-changes-amp-migration-guide.aspx

Creating a read-only memory stream around the byte array is pretty lightweight though:

byte[] data = new byte[] { 1, 2, 3 };
using(var stream = new MemoryStream(data, writable: false)) {
    blockBlob.UploadFromStream(stream);
}

Update: UploadFromByteArray is back

MSDN documentation - from what I can tell in the source code , this came back for version 3.0 and is still there for version 4.0.

Answer 2

update:

UploadFromByteArray is back.

public void UploadFromByteArray (
    byte[] buffer,
    int index,
    int count,
    [OptionalAttribute] AccessCondition accessCondition,
    [OptionalAttribute] BlobRequestOptions options,
    [OptionalAttribute] OperationContext operationContext
)

http://msdn.microsoft.com/en-us/library/microsoft.windowsazure.storage.blob.cloudblockblob.uploadfrombytearray.aspx

Answer 3

Using the new SDK azure.storage.blob

var blobContainerClient = new BlobContainerClient(storageConnectionString, containerName);
BlobClient blob = blobContainerClient.GetBlobClient(blobName);

using(var ms = new MemoryStream(data, false))
{
     await blob.UploadAsync(ms);
}

Answer 4

I also know nothing about Azure, but using Streams, you could approach it as follows:

//byte[] data;

using(var ms = new MemoryStream(data, false))
{
    blockBlob.UploadFromStream(ms);
}

Answer 5

This is the function I currently use:

//CREATE FILE FROM BYTE ARRAY
public static string createFileFromBytes(string containerName, string filePath, byte[] byteArray)
{

    try {

        CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.ConnectionStrings("StorageConnectionString").ConnectionString);



        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
        CloudBlobContainer container = blobClient.GetContainerReference(containerName);

        if (container.Exists == true) {
            CloudBlockBlob blockBlob = container.GetBlockBlobReference(filePath);


            try {
                using (memoryStream == new System.IO.MemoryStream(byteArray)) {
                    blockBlob.UploadFromStream(memoryStream);
                }
                return "";
            } catch (Exception ex) {
                return ex.Message.ToString();
            }
        } else {
            return "Container does not exist";
        }
    } catch (Exception ex) {
        return ex.Message.ToString();
    }
}