Getting list of names of Azure blob files in a container?

Question

I need to list names of Azure Blob file names. Currently I m able to list all files with URL but I just need list of names. I want to avoid parsing names. Can you please see

Answer 1

  CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString"));
   CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
    CloudFileShare share = fileClient.GetShareReference(ConfigurationManager.AppSettings["ShareReference"]);
    if (share.Exists())
    {
          CloudFileDirectory rootDir = share.GetRootDirectoryReference();
          CloudFileDirectory sampleDir = rootDir.GetDirectoryReference("paths");
          if (sampleDir.Exists())
          {
                IEnumerable<IListFileItem> fileList = sampleDir.ListFilesAndDirectories();
                 //CloudFile file = sampleDir.GetFileReference(FileName + ext);
                 //return file;
           }
           return null;
      }

From fileList one can get all the files from azure file

Answer 2

The ListBlobs method doesn't appear to exist anymore. Here is an async verison.

    public static async Task<List<string>> ListBlobNamesAsync(CloudBlobContainer container)
    {
        var blobs = await ListBlobsAsync(container);
        return blobs.Cast<CloudBlockBlob>().Select(b => b.Name).ToList();

        //Alternate version
        //return blobs.Select(b => b.Uri.ToString()).Select(s => s.Substring(s.LastIndexOf('/') + 1)).ToList();
    }

    public static async Task<List<IListBlobItem>> ListBlobsAsync(CloudBlobContainer container)
    {
        BlobContinuationToken continuationToken = null; //start at the beginning
        var results = new List<IListBlobItem>();
        do
        {
            var response = await container.ListBlobsSegmentedAsync(continuationToken);
            continuationToken = response.ContinuationToken;
            results.AddRange(response.Results);
        }

        while (continuationToken != null); //when this is null again, we've reached the end
        return results;
    }

Answer 3

This works with WindowsAzure.Storage 9.3.3.

CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
var cloudBlobContainer = cloudBlobClient.GetContainerReference(containerName);

var blobResultSegment = await cloudBlobContainer.ListBlobsSegmentedAsync(continuationToken);
var blobs = blobResultSegment.Results.Select(i => i.Uri.Segments.Last()).ToList();

Answer 4

Full answer with details.

        // Parse the connection string and return a reference to the storage account.
        CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("AzureBlobConnectionString"));

        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

        // Retrieve reference to a previously created container.
        CloudBlobContainer container = blobClient.GetContainerReference("container_name");

        // Retrieve reference to a blob named "test.csv"
        CloudBlockBlob blockBlob = container.GetBlockBlobReference("BlobName.tex");

        //Gets List of Blobs
        var list = container.ListBlobs();
        List<string> blobNames = list.OfType<CloudBlockBlob>().Select(b => b.Name).ToList();

Answer 5

If you're using Windows Azure Storage 4.3.0, try this code.

List<string> blobNames = list.OfType<CloudBlockBlob>().Select(b => b.Name).ToList();

Answer 6

Here is one more way to get this done:

CloudStorageAccount backupStorageAccount = CloudStorageAccount.Parse(blobConectionString);

var backupBlobClient = backupStorageAccount.CreateCloudBlobClient();
var backupContainer = backupBlobClient.GetContainerReference(container);

// useFlatBlobListing is true to ensure loading all files in
// virtual blob sub-folders as a plain list
var list = backupContainer.ListBlobs(useFlatBlobListing: true);
var listOfFileNames = new List<string>();

foreach (var blob in blobs) {
  var blobFileName = blob.Uri.Segments.Last();
  listOfFileNames.Add(blobFileName); 
}

return listOfFileNames;

Source: How to load list of Azure blob files recursively?