MVC上传(单文件)

后台代码：

 public ActionResult upload()
        {
            //获取文件对象
            var file = Request.Files[0];
            string suffix/*文件格式*/ = System.IO.Path.GetExtension(file.FileName);
            string fileName = DateTime.Now.ToString("yyyyMMddHHmmssfff") + suffix;
            string saveDic = "/upload/";
            if (file != null)
            {
                if (!Directory.Exists(Server.MapPath(saveDic)))
                {
                    Directory.CreateDirectory(Server.MapPath(saveDic));

                }
                file.SaveAs(Server.MapPath(saveDic) + fileName);
                
                return Content("<script>alert('添加成功!')</script>");
            }
            else
            {
                return Content("0");
            }
        }

 前台代码：

<form action="/test/upload" enctype="multipart/form-data" method="post">
    <input type="file" name="file" />
    <button id="upload">确定</button>
</form>