protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
        {
            string city = DropDownList2.SelectedItem.Text;
            dealer_keeper dk = new dealer_keeper();

            ArrayList arr = dk.GetData(city);
            Session["da"] = arr[0];
            Session["ds"] = arr[1];
            SetData(); 
        }
        protected void GetData(string city)
        {
            dealer_keeper dk = new dealer_keeper();
            

            ArrayList arr = dk.GetData(city);
            Session["da"] = arr[0];
            Session["ds"] = arr[1];
        }