如何获取 Azure 中子容器中的 blob 列表

Question

I need to get all the files from a storage with url: "https://example.blob.core.windows.net/file/subfile1/subfile2" I only need to read data files( only.txt for example, so if I have.jpg or something else I should skip those) and only from subfile2, not the whole storage.

With c# btw

Answer 1

I tried in my system able to download the all txt files in container subfolder( test is container and test1 is folder in container ),Try with this code.

using Microsoft.Azure.Storage.Blob;
using System;
using System.Collections.Generic;
using System.IO;

namespace listtxtblobs
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse("Connection string");
            CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
            CloudBlobContainer container = blobClient.GetContainerReference("test//container name");

            List<string> blobnames = new List<string>();
           
            var allblobs = container.ListBlobs(useFlatBlobListing: true);
            foreach (var b in allblobs)
            {
                
                string name = ((CloudBlockBlob)b).Name;
                Console.WriteLine(name);
                string[] names = name.Split('/');
                blobnames.Add(names[names.Length - 1]);




            }
            foreach(string name in blobnames)
            {
                Console.WriteLine(name);
                if (name.Contains(".txt"))
                {
                    string filePath = "local file path\\" + name;
                    CloudBlockBlob blockBlob = container.GetBlockBlobReference("test1\\"+ name);
                    blockBlob.DownloadToFile(filePath, FileMode.OpenOrCreate);
                    
                }
            }
        }
    }
}

Folder structure in azure storage

OUTPUT

Downloaded the all txt files in local folder

Answer 2

There are working samples for different versions

https://docs.microsoft.com/en-us/samples/azure-samples/storage-blobs-dotnet-quickstart/upload-download-blobs-net/

V11 works for me (I need to use this one due to.Net version limitation).