如何使用MVC将ID传递给图像文件名?

保存图像时,需要按如下方式组合compId和文件扩展名:

    var filename = compId.ToString() + Path.GetExtension(postedFile.FileName);

因此,您的代码应该如下所示:

    [HttpPost]
    public ActionResult AddImage(HttpPostedFileBase postedFile)
    {
        int compId = Convert.ToInt32(Session["compID"]);
        if (postedFile != null)
        {
            string path = Server.MapPath("~/Uploads/");
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }

            var filename = compId.ToString() + Path.GetExtension(postedFile.FileName);
            postedFile.SaveAs(path + filename);
            ViewBag.Message = "File uploaded successfully.";
        }

        return RedirectToAction("AddCompany");
    }