上传文件并建立相对应的文件夹

 1if (FileUp.PostedFile != null)
 2        {
 3            String filename = FileUp.FileName;
 4            int i = filename.LastIndexOf(".");
 5            String lastname = filename.Substring(i);
 6            if ( lastname != ".jpg")
 7            {
 8                Response.Write("文件格式不正确!");
 9                Response.End();
10            }
11            DateTime now = DateTime.Now;
12            String classid = DateTime.Now.ToString("yyyy-MM-dd");
13            if (!Directory.Exists(HttpContext.Current.Server.MapPath("upload/") + "\\" + classid))
14            {
15                System.IO.Directory.CreateDirectory(@HttpContext.Current.Server.MapPath("upload/") + "\\" + classid);
16            }
17            String upfilename = now.Millisecond.ToString() + "_" + FileUp.PostedFile.ContentLength.ToString() + lastname;
18            FileUp.PostedFile.SaveAs(Server.MapPath("upload\\" + classid + "\\" + upfilename));
19       
20        String imgurl = "upload\\" + classid + "\\" + upfilename;
21        String shopid = ddl_shop.SelectedValue;
22        String connstr = System.Configuration.ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
23        SqlConnection con = new SqlConnection(connstr);
24        con.Open();
25        SqlCommand comm = new SqlCommand();
26        comm.Connection = con;
27        comm.CommandText = "insert into tg163k_shopyh(shopid,[image])values(" + shopid + ",'" + imgurl + "')";
28        int j = comm.ExecuteNonQuery();
29        if (j>0)
30        {
31            Response.Write("<script>alert('添加成功');location.href='Default.aspx';</script>");
32
33        } 
34      }