ASP.NET 上传文件

Question

那你就在pageload的时候获取日期嘛，然后判断是否存在，不存在就创建，上传的时候也就根据日期选择文件夹就OK了，
if (!Directory.Exists(imgpath))
Directory.CreateDirectory(imgpath);

Answer 1

  if (FileUpload1.PostedFile.FileName != "")
            {
                string uploadName = FileUpload1.PostedFile.FileName;//获取待上传图片的完整路径，包括文件名 
                //string uploadName = InputFile.PostedFile.FileName; 
                string pictureName = "";        //上传后的图片名，以当前时间为文件名，确保文件名没有重复 
                int idx = uploadName.LastIndexOf(".");
                string suffix = uploadName.Substring(idx);       //获得上传的图片的后缀名 
                Random rand = new Random();
                int c = rand.Next(1000, 9999);
                pictureName = DateTime.Now.Ticks.ToString() + "_" + c + suffix;
                string Files_Date = DateTime.Now.ToString("yyyyMMdd");
                string path = Server.MapPath("image/" + Files_Date + "/");
                //string path2 = Server.MapPath("~/image/small/" + Files_Date + "/");
                if (!Directory.Exists(path)) Directory.CreateDirectory(path);
                //if (!Directory.Exists(path2)) Directory.CreateDirectory(path2);
                FileUpload1.PostedFile.SaveAs(path + pictureName);
                string webpath = Server.MapPath("image/" + Files_Date + "/" + pictureName);
                //string webpath2 = Server.MapPath("~/image/small/" + Files_Date + "/" + pictureName);
                //MakeThumbnail(webpath, webpath2, 130, 130, "Cut");
                //生成缩略图并存进文件夹                UserEntity ue = new UserEntity();
                ue.RegistName = this.txt_regist.Text.Trim();
                ue.RoleName = this.txt_role.Text.Trim();
                ue.ServerName = this.txt_server.Text.Trim();
                ue.PicPath = "image/" + Files_Date + "/" + pictureName;
                bool result = new UserService().Addinfo(ue);
                if (result)
                    Response.Write("<script>alert('提交成功');location='toupiao.aspx'</script>");
                else
                    Response.Write("<script>alert('提交失败');</script>");            }
            else
            {
                Response.Write("<script>alert('图片不能为空哦');location='javascript:history.go(-1);'</script>");
            }