无法在Web API C中接收表单数据

Question

I am trying to send the uploaded excel file to web api using XMLHttpRequest but all I receive in web api is an object. How to receive uploaded file in web api?

 upload(file: File): void {
        let formData: FormData = new FormData(),
        xhr: XMLHttpRequest = new XMLHttpRequest();
        formData.append("uploads", file, file.name);
        xhr.open('POST', this._expenseServiceUrl + 'expenses' + '/' + 'massupload', true);
        xhr.send(formData);
}

Web API

        [Route("massupload")]
        [HttpPost]
        public HttpResponseMessage MassUpload([FromUri] dynamic uploads)
        {
            try
            {
                response = Request.CreateResponse(HttpStatusCode.OK, "");
            }
            catch (Exception exception)
            {

            }
            return response;
        }

Answer 1

You can read the uploaded file from Request.Files

foreach (string fileId in Request.Files)
{
   HttpPostedFileBase file = Request.Files[fileId] as HttpPostedFileBase;
}

Also, you have decorated your uploads parameter with FromUri . You could also change that to FromBody as your file is in your POST body, not the URI.