void CheckColumn_ValueChanged(object sender, EventArgs e)
        {
            if (m_isBatchSetting)
            {
                return;
            }

            SummaryRow sumRow = m_grid.GetSummaryRow();

            if (sumRow != null)
            {
                List <string> sumColumnNames   = new List <string>();
                List <string> countColumnNames = new List <string>();
                foreach (Cell cell in sumRow.Cells)
                {
                    SummaryCell sumCell = cell as SummaryCell;
                    if (sumCell != null)
                    {
                        if (sumCell.StatFunction == StatFunction.Sum)
                        {
                            sumColumnNames.Add(cell.ParentColumn.FieldName);
                        }
                        else if (sumCell.StatFunction == StatFunction.Count)
                        {
                            countColumnNames.Add(cell.ParentColumn.FieldName);
                        }
                    }
                }

                if (sumColumnNames.Count > 0 || countColumnNames.Count > 0)
                {
                    ValueRow valueRow = m_grid.GetValueRow();
                    if (valueRow == null)
                    {
                        sumRow.Visible = false;
                        valueRow       = m_grid.AddValueRowToFixedFooter();
                    }

                    bool      allSelect  = true;
                    bool      noneSelect = true;
                    decimal[] sum        = new decimal[sumColumnNames.Count];
                    for (int i = 0; i < sumColumnNames.Count; ++i)
                    {
                        sum[i] = 0;
                    }
                    int[] count = new int[countColumnNames.Count];
                    for (int i = 0; i < countColumnNames.Count; ++i)
                    {
                        count[i] = 0;
                    }

                    foreach (Xceed.Grid.DataRow row in m_grid.DataRows)
                    {
                        if (Convert.ToBoolean(row.Cells[m_selectColumnName].Value))
                        {
                            for (int i = 0; i < sumColumnNames.Count; ++i)
                            {
                                decimal?d = ConvertHelper.ToDecimal(row.Cells[sumColumnNames[i]].Value);
                                sum[i] += d.HasValue ? d.Value : 0;
                            }
                            for (int i = 0; i < countColumnNames.Count; ++i)
                            {
                                count[i] += 1;
                            }
                            noneSelect = false;
                        }
                        else
                        {
                            allSelect = false;
                        }
                    }
                    for (int i = 0; i < sumColumnNames.Count; ++i)
                    {
                        valueRow.Cells[sumColumnNames[i]].Value = sum[i];
                    }
                    for (int i = 0; i < countColumnNames.Count; ++i)
                    {
                        valueRow.Cells[countColumnNames[i]].Value = count[i];
                    }

                    if (allSelect)
                    {
                        valueRow.Cells[m_selectColumnName].Value = true;
                    }
                    else if (noneSelect)
                    {
                        valueRow.Cells[m_selectColumnName].Value = false;
                    }
                    else
                    {
                        valueRow.Cells[m_selectColumnName].Value = null;
                    }
                }
            }
        }