Get complete hierarchy of azure blob structure based on prefix - azure

Question

I have following hierarchy in my azure storage container :
Container
-- Folder 1
-- Folder 2
-- Folder 2.1
-- File 1
-- File 2
-- File 3
What I'm searching for is a generic function where I can pass string e.g. "container/Folder1/Folder2" and it return me the hierarchy i.e.
-- Folder 2.1
-- File 1
-- File 2
-- File 3
I have following code in place but in this I'm not able to pass the prefix as "container/Folder1/Folder2". If I add "/" in prefix string then it throws error that invalid uri string.
static void printCloudDirectories(IEnumerable<IListBlobItem> blobList, Container cont)
{
foreach (var blobitem in blobList)
{
if (blobitem is CloudBlobDirectory)
{
var container = new Container();
var directory = blobitem as CloudBlobDirectory;
Console.WriteLine(directory.Prefix);
container.Name = directory.Prefix;
BlobContinuationToken token = null;
var directories = directory.ListBlobsSegmentedAsync(token).Result.Results;
printCloudDirectories(directories, container);
cont.Containers.Add(container);
}
else
{
cont.Children.Add(blobitem.Uri.AbsoluteUri);
}
}
}
public static void ListClientMethod(CloudBlobClient cloudBlobClient)
{
BlobContinuationToken token = null;
var containerSegments = cloudBlobClient.ListContainersSegmentedAsync(token).Result;
List<Container> containers = new List<Container>();
foreach (var container in containerSegments.Results)
{
Console.WriteLine("Container: " + container.Name);
var cont = new Container();
cont.Name = container.Name;
// ADD A CALL TO printCloudDirectories:
BlobContinuationToken token1 = null;
var blobs = container.ListBlobsSegmentedAsync(token1).Result.Results;
printCloudDirectories(blobs, cont);
containers.Add(cont);
}
}
public class Container
{
public Container()
{
Children = new List<string>();
Containers = new List<Container>();
}
public string Name { get; set; }
public List<string> Children { get; set; }
public List<Container> Containers { get; set; }
}
I use c# as coding language

Answer 1

Please use ListBlobsSegmentedAsync(String, Boolean, BlobListingDetails, Nullable<Int32>, BlobContinuationToken, BlobRequestOptions, OperationContext) method.
The 1st parameter to this method is the Blob Prefix and you need to specify Folder 1/Folder 2/ there.
2nd parameter to this method is useFlatBlobListing and you need to pass true for that.
It should return you a result like:
Folder 1/Folder 2/Folder 2.1/File 1
Folder 1/Folder 2/Folder 2.1/File 2
Folder 1/Folder 2/Folder 2.1/File 3
and you should be able to construct the desired treeview based on this.