How to get the files in an Azure container virtual folder using c#

Question

I've reviewed this: Getting list of names of Azure blob files in a container?

and this: https://feedback.azure.com/forums/287593-logic-apps/suggestions/16252474-list-files-in-folder-on-azure-blob-storage

But I have not found any code examples of how to list the files in a particular virtual folder within a container using c#. This is as far as I got. I do not see any way to specify a file path in the ListBlobs ()method.

        var blobStorageAccount = GetStorageAccount();
        var blobClient = blobStorageAccount.CreateCloudBlobClient();
        var blobContainer = blobClient.GetContainerReference(containerName);
        List<string> blobNames = blobContainer.ListBlobs().OfType<CloudBlockBlob>().Select(b => b.Name).ToList();

Peter Bons · Accepted Answer · 2018-07-30 18:30:10Z

6

There is no such thing as a subfolder. You have containers containing blobs. You do have virtual folders, for example

/container/virtualfolder/myblob

The container name is container and the blob name is virtualfolder/myblob

You can list all blobs in a virtual folder using the prefix parameter (see the docs):

        var blobStorageAccount = GetStorageAccount();
        var blobClient = blobStorageAccount.CreateCloudBlobClient();
        var blobContainer = blobClient.GetContainerReference(containerName);
        List<string> blobNames = blobContainer.ListBlobs(prefix: "virtualfolder").OfType<CloudBlockBlob>().Select(b => b.Name).ToList();

answered Jul 30, 2018 at 18:30

Peter Bons

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2 Comments

E. A. Bagby Over a year ago

That worked. Thanks! Is there a built in way to isolate the blob name from the virtual path? Or, perhaps Path.GetFileName() will work

Peter Bons Over a year ago

Hmm not sure. Path.GetFileName() might work, or you can try a .Split('/').Last()

Kirby · Accepted Answer · 2020-12-08 05:24:54Z

2

Microsoft.Azure.Storage.Blob is deprecated. Using Azure.Storage.Blob looks like it would be:

List<string> blobNames = blobContainer.GetBlobs(prefix: "virtualfolder").Select(b => b.Name).ToList();

edited Dec 8, 2020 at 5:24

Kirby

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answered Dec 8, 2020 at 4:54

callmedubya

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