How to upload file from Web Api 2 to Azure Blob Storage using MultipartMemoryStreamProvider

Question

I am trying to send data [User ID, File] from UWP to WebAPI2. From WebApi2, I want to create a container in Azure Storage [container name = user ID]. The code is as follows. The first part is the client side [UWP].

foreach (StorageFile file in files)
        {

            filesListView.Items.Add(file.DisplayName);
            IInputStream inputStream = await file.OpenAsync(FileAccessMode.Read);
            HttpMultipartFormDataContent multipartContent = new HttpMultipartFormDataContent();


            //if (i == false)
            //{
                multipartContent.Add(new HttpStringContent(txtbox.Text), "myText");
                i = true;
           // }


            multipartContent.Add(new HttpStreamContent(inputStream), "myFile", file.Name);

            HttpClient client = new HttpClient();
            Uri uri = new Uri("http://localhost:35095/api/upload");
            HttpResponseMessage response = await client.PostAsync(uri,multipartContent);

        }

The code below represents the WebAPI2 code to upload files in Azure Blob:

namespace DemoAzureStorage.Controllers

{ [RoutePrefix("api/upload")] public class UploadController : ApiController {

    [HttpPost, Route("")]
    public async Task<object>  UploadFile()
    {
        if (!Request.Content.IsMimeMultipartContent())
        {
            throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
        }

        CloudBlobContainer imagesContainer = null;
        string Container;
        string root = HttpContext.Current.Server.MapPath("~/App_Data");
        var provider = new MultipartFormDataStreamProvider(root);


        try
        {
            await Request.Content.ReadAsMultipartAsync<MultipartMemoryStreamProvider>(new MultipartMemoryStreamProvider()).ContinueWith((tsk) =>
             {
                 MultipartMemoryStreamProvider prvdr = tsk.Result;
                 var accountName = ConfigurationManager.AppSettings["storage:account:name"];
                 var accountKey = ConfigurationManager.AppSettings["storage:account:key"];
                 var storageAccount = new CloudStorageAccount(new StorageCredentials(accountName, accountKey), true);
                 CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

                 foreach (HttpContent ctnt in prvdr.Contents)
                 {
                     // You would get hold of the inner memory stream here
                     Stream stream = ctnt.ReadAsStreamAsync().Result;

                     var type1 = ctnt.GetType();




                     if (ctnt.Headers.ContentDisposition.Name == "\"myFile\"")
                     {

                         var filename = ctnt.Headers.ContentDisposition.FileName.Trim();

                         var a = filename;

                         CloudBlockBlob blob = imagesContainer.GetBlockBlobReference(filename);

                         if (ctnt.Headers.ContentType != null)
                         {
                             // Set appropriate content type for your uploaded file
                             blob.Properties.ContentType = ctnt.Headers.ContentType.MediaType;
                         }

                         //  this.FileData.Add(new MultipartFileData(ctnt.Headers, blob.Name));

                           StreamReader rdr = new StreamReader(stream);

                         var a1 = rdr;


                         blob.UploadFromStream(stream);

                     }

                     else
                     {
                         string aaa = ctnt.Headers.ContentDisposition.ToString();

                         StreamReader rdr = new StreamReader(stream);

                         Container = rdr.ReadLine();
                         string z = Container;

                         imagesContainer = blobClient.GetContainerReference(z);
                         imagesContainer.CreateIfNotExists();


                         while (!rdr.EndOfStream)
                         {
                             // Console.WriteLine(rdr.ReadLine());
                             Trace.WriteLine(rdr.ReadLine());
                         }


                     }
                 }
             });

            return Request.CreateResponse(HttpStatusCode.OK);
        }
        catch (System.Exception e)
        {
            return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
        }
    }

}

}

In this above WebApi2 code, the Azure storage container is being created but when I call the following method, the blob is created but with "0 byte size" i.e, no data/ content is being passed to blob rather only a blob is created with respective file name:

  blob.UploadFromStream(stream);

Need help to pass the data of the text file to the blob as it is. Any help/ suggestions would be highly appreciated. Thanks :)

N.B: I'm a newbie :)