سلام

من از طریق کد زیر اطلاعات رو از طریق دیتاتیبل و سیشن داخل گریدویو میریزم

میخوام اطلاعات اونو در بانک ذخیره کنم اما خطای زیر داده میشه

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

از کد زیر استفاده کردم

 int i = 0;
            string title = string.Empty;
            title = GridView1.Rows[0].Cells[0].Text.ToString();
            string body = txtCount.Text;
            long price=long.Parse( GridView1.Rows[0].Cells[4].Text);
            string priceKol =string.Empty;
            string cod = txtCode.Text;

            if (Session["dt"] == null)
            {
                DataTable dt = new DataTable();

                DataColumn dc1 = new DataColumn("ردیف");
                DataColumn dc2 = new DataColumn("نام محصول");
                DataColumn dc3 = new DataColumn("تعداد");
                DataColumn dc4=new DataColumn("قیمت جزء");
                DataColumn dc5 = new DataColumn("قیمت کل ");
                DataColumn dc6 = new DataColumn("کد محصول");

                dt.Columns.Add(dc1);
                dt.Columns.Add(dc2);
                dt.Columns.Add(dc3);
                dt.Columns.Add(dc4);
                dt.Columns.Add(dc5);
                dt.Columns.Add(dc6);

                dt.Rows.Add(new object[] { i, title, body,price,priceKol,cod });

                Session["dt"] = dt;

                GridView3.DataSource = dt;
                GridView3.DataBind();
                for (int j = 0; j < GridView3.Rows.Count; j++)
                {
                    GridView3.Rows[j].Cells[0].Text = (j + 1).ToString();
                    GridView3.Rows[j].Cells[4].Text = (long.Parse(GridView3.Rows[j].Cells[3].Text) * int.Parse(GridView3.Rows[j].Cells[2].Text)).ToString();
                }
            }
            else
            {
                DataTable dtTemp = (DataTable)Session["dt"];
                dtTemp.Rows.Add(new object[] { i, title, body,price,priceKol,cod });
                Session["dt"] = dtTemp;

                GridView3.DataSource = dtTemp;
                GridView3.DataBind();
                for (int j = 0; j < GridView3.Rows.Count; j++)
                {
                    GridView3.Rows[j].Cells[0].Text = (j + 1).ToString();
                    GridView3.Rows[j].Cells[4].Text = (long.Parse(GridView3.Rows[j].Cells[3].Text) * int.Parse(GridView3.Rows[j].Cells[2].Text)).ToString();
               
                }
            }

حال برای ذخیره از کد زیر استفاده کردم

for (int i = 0; i < GridView3.Rows.Count; i++)
              {
       

                    //SqlConnection con2 = new SqlConnection();
                    //con2.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["cn"].ConnectionString;
                    //SqlCommand cmd2 = new SqlCommand("Sp", con2);
                    //cmd2.CommandType = CommandType.StoredProcedure;
   cmd2.Parameters.AddWithValue("@CodeM",long.Parse( GridView3.Rows[i].Cells[5].Text));              }