azure blob client returns file not fully - azure

Question

i'm trying to download file from azure blob storage, but it returns only part of file. What i'm doing wrong ? File in storage is not corrupted
public async Task<byte[]> GetFile(string fileName)
{
var blobClient = BlobContainerClient.GetBlobClient(fileName);
var downloadInfo = await blobClient.DownloadAsync();
byte[] b = new byte[downloadInfo.Value.ContentLength];
await downloadInfo.Value.Content.ReadAsync(b, 0, (int)downloadInfo.Value.ContentLength);
return b;
}

Answer 1

I'm using Azure.Storage.Blobs 12.4.2 package. I tried this code and it works for me
public async Task<byte[]> GetFile(string fileName)
{
var blobClient = BlobContainerClient.GetBlobClient(fileName);
using (var memorystream = new MemoryStream())
{
await blobClient.DownloadToAsync(memorystream);
return memorystream.ToArray();
}
}

Answer 2

I am not able to full understand your code as the current BlobClient as of v11.1.1 does not expose any download methods. As #Guarav Mantri-AIS mentioned the readAsync can behave in that manner.
Consider an alternative using the DownloadToByteArrayAsync() which is part of the API. I have include the code required to connect but of course this is just for the purpose of demonstrating a full example.
Your method would be condensed as follows:
public async Task<byte[]> GetFile(string containerName, string fileName)
{
//i am getting the container here, not sure where or how you are doing this
var container = GetContainer("//your connection string", containerName);
//Get the blob first
ICloudBlob blob = container.GetBlockBlobReference(fileName);
//and now download it straight to a byte array
return await blobClient.DownloadAsync();
}
public CloudBlobContainer GetContainer(string connectionString, string containerName)
{
//1. connect to the account
var account = CloudStorageAccount.Parse(connectionString);
//2. create a client
var blobClient = _account.CreateCloudBlobClient();
//3. i am getting the container here, not sure where or how you are doing this
return = _blobClient.GetContainerReference(containerName);
}