CSReportDll.cReport.pEvalGroupChange C# (CSharp) Метод

        private void pEvalGroupChange(int i)
        {
            if (m_vGroups[i].grandTotalGroup)
            {
                if (m_vGroups[i].value == null)
                {
                    changeGroup(i, "1");
                }
            }
            else
            {
                int col = m_vGroups[i].indexField;
                int row = m_vRowsIndex[m_iRow2];
                switch (m_vGroups[i].comparisonType)
                {
                    case csRptGrpComparisonType.CSRPTGRPTEXT:
                        String text = cReportGlobals.valVariant(m_rows.Rows[row][col]).ToString().ToLower();
                        if (m_vGroups[i].value == null)
                        {
                            changeGroup(i, text);
                        }
                        else if (m_vGroups[i].value.ToString() != text)
                        {
                            changeGroup(i, text);
                        }
                        break;
                    
                    case csRptGrpComparisonType.CSRPTGRPNUMBER:
                        double number = cUtil.val(cReportGlobals.valVariant(m_rows.Rows[row][col]));
                        if (m_vGroups[i].value == null)
                        {
                            changeGroup(i, number);
                        }
                        else if ((double)m_vGroups[i].value != number)
                        {
                            changeGroup(i, number);
                        }
                        break;

                    case csRptGrpComparisonType.CSRPTGRPDATE:
                        DateTime date = cReportGlobals.dateValue(cReportGlobals.valVariant(m_rows.Rows[row][col]));
                        if (m_vGroups[i].value == null)
                        {
                            changeGroup(i, date);
                        }
                        else if ((DateTime)m_vGroups[i].value != date)
                        {
                            changeGroup(i, date);
                        }
                        break;
                }
            }
        }