How can we load a list of Azure blob files recursively?

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Hello guys,

Azure blob files are stored in a plain list without any physical folder structure, but we can create virtual folders where each file's folder path is a part of it's name.

It brings out another problem, how to retrieve a list of ALL files in virtual sub-folder, using only that folder's name?

TIA
Aug 13, 2018 in Azure by cloudie_crank
• 1,610 points
1,477 views

1 answer to this question.

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Actually, there's a simpler way to do that and it is available in the library itself. If you look at CloudBlobContainer.ListBlobs method, it accepts two parameters:

  1. prefix: This is the name of your directory. If it is a nested directory, you will need to specify the full path e.g. myfolder/mysubfolder.
  2. useFlatBlobListing: Setting this value to true will ensure that only blobs are returned (including inside any sub folders inside that directory) and not directories and blobs.

var account = new CloudStorageAccount(new StorageCredentials(accountName, accountKey), true);
    var blobClient = account.CreateCloudBlobClient();
    var container = blobClient.GetContainerReference("blob-container-name");
    var blobs = container.ListBlobs(prefix: "container-directory", useFlatBlobListing: true);

You will get a list of all blobs belonging in the "container-directory" in blobs variable.

 

answered Aug 13, 2018 by null_void
• 3,220 points

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