List directories in amazon S3 with AWS SDK

Question

I am trying to list folders in S3:

string delimiter = "/";
folder = "a/";
ListObjectsResponse r = s3Client.ListObjects(new Amazon.S3.Model.ListObjectsRequest()
{
  BucketName = BucketName,
  Prefix = folder, 
  MaxKeys = 1000,
  Delimiter = delimiter
});

and i expect list of directories such as:

a/Folder1
a/Folder2
....
a/FolderN

but my actual result is only 1 object: 'a1'

Answer 1

Folders are not treated as objects in S3.

Instead, I need to read string[] CommonPrefixes property, which has my subfolders