如何使用 c# 获取 Azure 容器虚拟文件夹中的文件

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();

Answer 1

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();

Answer 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();