webapi后端返回文件流

 public HttpResponseMessage GetFileFromWebApi()

 {

  try

  {

  var FilePath = System.Web.Hosting.HostingEnvironment.MapPath(@"~/download/EditPlus64_xp85.com.zip");

  var stream = new FileStream(FilePath, FileMode.Open);

  HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);

  response.Content = new StreamContent(stream);

  response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

  response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") {

  FileName="Wep Api Demo File.zip"

  };

  return response;

  }

  catch

  {

  return new HttpResponseMessage(HttpStatusCode.NoContent);

  }

 }