How to get the name of all the folders and subfolders of an Azure container - azure-blob-storage

Question

I have this container Ofertas with 3 folders
within each of the 3 main folders there are hundreds of subfolders and within each of these subfolders are the files or blobs
I need to get the list of these subfolders but I only know how to get the principal folder names
string connectionString = _configuration.GetConnectionString("ArchivadoHistoricoOfertas");
BlobServiceClient blobServiceClient = new BlobServiceClient(connectionString);
BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient("ofertas");
var blobFolders = containerClient.GetBlobsByHierarchy(BlobTraits.None, BlobStates.None, "/").Where(b => b.IsPrefix).ToList();
blobFolders.ForEach(f => {
Console.WriteLine("Folder Prefix: " + f.Prefix);
});
I have tried this
But here the code stops and nothing happens
Any idea, please?
Thanks

Answer 1

I tried in my environment and got below results:
If you need to get all folder, subfolder and files in structure you can use below code.
Code:
class Program
{
static async Task Main(string[] args)
{
// Get a connection string to our Azure Storage account.
string connectionString = "<connect strng>";
string containerName = "test";
Console.WriteLine($"Getting blobs and virtual directories for container '{containerName}'");
BlobContainerClient container = new BlobContainerClient(connectionString, containerName);
await ListBlobsForPrefixRecursive(container,"", 0);
}
public static async Task ListBlobsForPrefixRecursive(BlobContainerClient container, string prefix, int level)
{
string spaces = new string(' ', level);
Console.WriteLine($"{spaces}- {prefix}");
await foreach (Page<BlobHierarchyItem> page in container.GetBlobsByHierarchyAsync(prefix: prefix, delimiter: "/").AsPages())
{
foreach (var blob in page.Values.Where(item => item.IsBlob).Select(item => item.Blob))
{
Console.WriteLine($"{spaces} {blob.Name}");
}
var prefixes = page.Values.Where(item => item.IsPrefix).Select(item => item.Prefix);
foreach (var s in prefixes)
{
await ListBlobsForPrefixRecursive(container, s, level + 1);
}
}
}
}
Output:
If you need to get the particular root folder to get subfolder you use the below code:
Code:
using Azure.Storage.Blobs;
namespace storage326
{
class Program
{
static void Main(string[] args)
{
string connectionString = "< storage account>";
string rootfolder = "demo";
List<string> subfolder = new List<string>();
BlobServiceClient blobServiceClient = new BlobServiceClient(connectionString);
string containerName = "test";
BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient(containerName);
var blobs = containerClient.GetBlobs(prefix: rootfolder);
foreach (var blob in blobs)
{
//Console.WriteLine(blob.Name);
string[] sub_names = blob.Name.Split('/');
if (sub_names.Length > 2 && !subfolder.Contains(sub_names[1]))
{
subfolder.Add(sub_names[1]);
}
}
foreach (var s in subfolder)
{
Console.WriteLine(rootfolder+"/"+ s);
}
}
}
}
Console: