Question

我正在尝试将数据[用户ID，文件]从UWP发送到WebAPI2。从WebApi2，我想在Azure存储中创建一个容器[容器名称=用户ID]。代码如下。第一部分是客户端[UWP]。

<ui:composition
   xmlns="http://www.w3.org/1999/xhtml"
   xmlns:h="http://java.sun.com/jsf/html"
   xmlns:f="http://java.sun.com/jsf/core"
   xmlns:ui="http://java.sun.com/jsf/facelets"
   xmlns:p="http://primefaces.org/ui">

   <p:panel
        header="panel-1"
        id="panel-1"
        toggleable="true"
        collapsed="true">
   </p:panel>

  <p:panel
        header="panel-2"
        id="panel-2"
        toggleable="true"
        collapsed="true">
   </p:panel>

</ui:composition>

以下代码表示在Azure Blob中上传文件的WebAPI2代码：

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);

        }

{ [RoutePrefix（＆＃34; API /上传＆＃34）] public class UploadController：ApiController {

namespace DemoAzureStorage.Controllers

}

在上面的WebApi2代码中，正在创建Azure存储容器，但是当我调用以下方法时，会创建blob但是使用＆＃34; 0字节大小＆＃34;即，没有数据/内容传递给blob，而只是创建了具有相应文件名的blob：

    [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);
        }
    }

}

需要帮助将文本文件的数据原样传递给blob。任何帮助/建议将受到高度赞赏。谢谢:)）

N.B：我是新手：）

如何使用MultipartMemoryStreamProvider将文件从Web Api 2上载到Azure Blob存储

0 个答案: