Mini Shell

using System;
using System.Threading;
using System.Web.UI;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Collections;
using System.Configuration;
using System.IO;
using System.Drawing.Imaging;

public partial class produto : System.Web.UI.Page
{

    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["protarteConnectionString"].ConnectionString);

    protected void Page_Load(object sender, EventArgs e)
    {

        string cat = Request.QueryString["id"] ;
       
        
        SqlCommand select1 = new SqlCommand("SELECT * from produto where cat='"+cat+"'"  , con);
        SqlDataReader dr;
        try
        {
            con.Open();
            dr = select1.ExecuteReader();



            while (dr.Read())
            {
             string cod = dr["cod"].ToString();
        
             Label1.Text += cod;
                   

            }


            con.Close();
        }
        catch (Exception ex)
        {
            Label1.Text = ex.ToString();
        }
    }
    
   
     
}