文件上传在 Visual Studio IIS Express 中工作但不在服务器上

Question

I have a view on a web application where a file is uploaded by a user to pre-fill a form. The view on which the form is located has two Html.BeginForm declarations, one to upload the file, and one to submit the filled form. Everything works fine when I debug locally using IIS Express, but when I deploy to my development server, the file does not upload. I am hoping someone might be able to provide some insight into why this is occurring.

File upload excerpt from view:

@using (Html.BeginForm("Populate", "ScProject", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
   //file upload and submit button
}

File upload excerpt from controller:

[HttpPost]
public ActionResult Populate(HttpPostedFileBase file)
{
   if (file != null && file.ContentLength > 0)
      try
      {
         string path = Path.Combine(Server.MapPath("~/Content"), System.IO.Path.GetFileName(file.FileName));
         file.SaveAs(path);
         return RedirectToAction("Create", new { file = Path.GetFileName(file.FileName) });
      }
      catch (Exception ex)
      {
         ...omitted error logging code...
         return RedirectToAction("Create");
      }
   else
   {
      ...omitted error logging code...
      return RedirectToAction("Create");
   }
}

The RedirectToAction("Create", new { file = Path.GetFileName(file.FileName) }); reloads the view and populates the form using the uploaded file. I have attempted to execute this action using a pre-uploaded file by entering a url: ../ScProject/Create?file=upload.pptx which again, works fine on IIS Express, but fails on the development server. If anyone can offer any insight it would be greatly appreciated.

Answer 1

Here is the check list:

1. Do you use Windows authentication on the failing server?
2. Are you running Application pull under service account or ApplicationPoolIdentity?
3. Does your target folder security allows Read/Right access to that account?

Answer 2

如果代码在 IIS Express 但不是 IIS 中运行时保存文件，那么它的主要问题是 App Pool Identity 没有访问您尝试保存文件的目录的权限。