string UserID = MemberMessage.MemberID.ToString();
          //string UserID = "45";//直接写死的id可以， IE 火狐 可以上传   但是换成上面的写法就不行了 求解
            string pathStr = "/images/upload/UserAlbum/User" + UserID;
            string path = Server.MapPath(pathStr);
            if (!System.IO.Directory.Exists(path))
            {
                System.IO.Directory.CreateDirectory(path);
            }
            string FileName = DateTime.Now.ToString("yyyyMMddHHmmss") + "_" + Request.Form["fileName"];
            string savePath = path + "/" + FileName;
            file.SaveAs(savePath);