Unexpected end of MIME multipart stream in reading the second time in Web API

问题

at first step I tried to read the contents into MultipartMemoryStreamProvider with the following code

 var multipartMemoryStreamProvider = await Request.Content.ReadAsMultipartAsync();

It solve my problem in getting the input File in memory.In this case I have access to other contents Key , but not value . I tried to get them with reading again the Contents into MultipartFormDataStreamProvider variable

string root = HttpContext.Current.Server.MapPath("~/uploads");
var provider = new MultipartFormDataStreamProvider(root);

Seems because I try to read the stream twice , it has the following error:

Unexpected end of MIME multipart stream. MIME multipart message is not complete

My first preference is to convert MultipartMemoryStreamProvider to MultipartFormDataStreamProvider

Is it possible to do that?

来源：https://stackoverflow.com/questions/46766263/unexpected-end-of-mime-multipart-stream-in-reading-the-second-time-in-web-api