download azure container as zip file asp.net mvc

Question

i want to download all files in container on azure as zip file and make the path to download be dynamic this the right now code

string userName = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
        string[] arr = userName.Split('\\');
        string path = $@"C:\Users\{arr[1]}\Downloads\";
        CloudBlobContainer contianner = BlobClient.GetContainerReference(contianerName);

        var list = contianner.ListBlobs();

       /// Console.WriteLine(list.Count());
        string[] FilesName = new string[list.Count()];
        int i = 0;
        foreach (var blob in list)
        {
            string[] Name = blob.Uri.AbsolutePath.Split('/');
            FilesName[i++] = Name[2];
          //  Console.WriteLine(Name[2]);
            CloudBlockBlob blockBlob = contianner.GetBlockBlobReference(Name[2]);
            System.IO.Directory.CreateDirectory($@"{path}ImagesPath");
            using (var fileStream = System.IO.File.OpenWrite($@"{path}\ImagesPath\{Name[2]}"))
            {
                blockBlob.DownloadToStream(fileStream);
            }

        }

Answer 1

You need to finish your job using 3 steps.

Step 1, Download all the files to a folder. I suggest you create a folder under your content folder of your web application.

// Retrieve storage account from connection string.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse("storage connection string");

// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

string containerName = "mycontainer";

// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference(containerName);

var blobs = container.ListBlobs(string.Empty, true);
string currentDateTime = DateTime.Now.ToString("yyyyMMddhhmmss");
string directoryPath = Server.MapPath("~/Content/" + containerName + currentDateTime);
System.IO.Directory.CreateDirectory(directoryPath);
foreach (CloudBlockBlob blockBlob in blobs)
{
    string[] segements = blockBlob.Name.Split('/');
    string subFolderPath = directoryPath;
    for (int i = 0; i < segements.Length - 1; i++)
    {
        subFolderPath = subFolderPath + "\\" + segements[i];
        if (!System.IO.Directory.Exists(subFolderPath))
        {
            System.IO.Directory.CreateDirectory(subFolderPath);
        }
    }
    string filePath = directoryPath + "\\" + blockBlob.Name;
    blockBlob.DownloadToFile(filePath, System.IO.FileMode.CreateNew);
}

Console.WriteLine("Download files successful.");

Step 2, After download the files, we could compress the folder using System.IO.Compression.ZipFile class. To use it, we need to add references to 2 assemblies. System.IO.Compression and System.IO.Compression.FileSystem.

System.IO.Compression.ZipFile.CreateFromDirectory(directoryPath, directoryPath + ".zip");
Console.WriteLine("Compress the folder successfully");

Step 3, Since the zip file is generated in the content folder, you could generate the URL for downloading operation.

string url = "http://hostname:port/content/" + containerName + currentDateTime + ".zip";