ต้องการทำเลขลำดับแถว เริ่มจาก 1 ถึง บรรทัดสุดท้ายไม่ได้ครับ รบกวนแนะนำด้วยครับ

int levelseq = i+1;

protected void Button3_Click(object sender, EventArgs e)
    {
        RadioButton RG1 = null;
        if (RadioButton1.Checked == true)
        {
            RG1 = RadioButton1;

            SqlTransaction tr = objConn.BeginTransaction();
            SqlCommand cmd = objConn.CreateCommand();

            try
            {
                cmd.CommandType = CommandType.Text;
                cmd.Transaction = tr;
                
                for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
                    {
                        string typeCarbinet = "1";
                        string typeDrawer = "2";
                        string typeFiles = "3";
                        string typeBinder = "4";

                        string chkCabinet = GridView1.Rows[i].Cells[5].Text.Trim();
                        string chkDrawer = GridView1.Rows[i].Cells[6].Text.Trim();
                        string chkFiles = GridView1.Rows[i].Cells[7].Text.Trim();
                        string chkBinder = GridView1.Rows[i].Cells[8].Text.Trim();

                        int levelseq = 1;

                        if (i >= 0)
                        {
                            bool testchk1 = false;
                            for (int c = 0; c < i; c++) //###Check Cabinet###
                            {
                               if (GridView1.Rows[i].Cells[5].Text.Trim() == GridView1.Rows[c].Cells[5].Text.Trim())
                                {
                                    testchk1 = true;
                                    break;
                                }
                             }
                            if (testchk1 == false)
                            {
                                cmd.CommandText = "Insert Into DIP_LEVEL2(LEVEL_SEQ,LEVEL_TYPE,LEVEL_NAME)" + " values ('" + levelseq + "','" + typeCarbinet + "','" + chkCabinet + "')";
                                cmd.ExecuteNonQuery();
                            }

                            bool testchk2 = false;
                            for (int d = 0; d < i; d++) //###Check Drawer###
                            {
                                if (GridView1.Rows[i].Cells[6].Text.Trim() == GridView1.Rows[d].Cells[6].Text.Trim())
                                {
                                    testchk2 = true;
                                    break;
                                }
                            }
                            if (testchk2 == false)
                            {
                                cmd.CommandText = "Insert Into DIP_LEVEL2(LEVEL_SEQ,LEVEL_TYPE,LEVEL_NAME)" + " values ('" + levelseq + "','" + typeDrawer + "','" + chkDrawer + "')";
                                cmd.ExecuteNonQuery();
                            }

                            bool testchk3 = false;
                            for (int f = 0; f < i; f++) //###Check Files###
                             {
                                if (GridView1.Rows[i].Cells[7].Text.Trim() == GridView1.Rows[f].Cells[7].Text.Trim() && GridView1.Rows[i].Cells[6].Text.Trim() == GridView1.Rows[f].Cells[6].Text.Trim())
                                {
                                    testchk3 = true;
                                    break;
                                }
                            }
                            if (testchk3 == false)
                            {
                                cmd.CommandText = "Insert Into DIP_LEVEL2(LEVEL_SEQ,LEVEL_TYPE,LEVEL_NAME)" + " values ('" + levelseq + "','" + typeFiles + "','" + chkFiles + "')";
                                cmd.ExecuteNonQuery();
                            }

                            bool testchk4 = false;
                            for (int b = 0; b < i; b++) //###Check Binder###
                            {
                                if (GridView1.Rows[i].Cells[8].Text.Trim() == GridView1.Rows.Cells[8].Text.Trim())
                                {
                                    testchk4 = true;
                                    break;
                                }
                            }
                            if (testchk4 == false)
                            {
                                cmd.CommandText = "Insert Into DIP_LEVEL2(LEVEL_SEQ,LEVEL_TYPE,LEVEL_NAME)" + " values ('" + levelseq + "','" + typeBinder + "','" + chkBinder + "')";
                                cmd.ExecuteNonQuery();
                            }

                        levelseq = levelseq  + 1;
                        }
                    }
                    
                    tr.Commit();
                    Label4.Text = "บันทึกข้อมูลเรียบร้อย";
            }
            catch (SqlException ex)
            {
                tr.Rollback();
                Label2.Text = "Error - TRANSACTION ROLLED BACK\n" + ex.Message;
            }
            catch (Exception ex)
            {
                tr.Rollback();
                Label2.Text = "System Error\n" + ex.Message;
            }
            finally
            {
                objConn.Close();
                tr.Dispose();
            }
        }