C1FlexGrid的SubTotal函数

flex.Subtotal(C1.Win.C1FlexGrid.AggregateEnum.Clear); for (int c = 0; c < flex.Cols.Count; c++) {                    if (c < flex.Cols.Fixed || flex.Cols[c].DataType == typeof(System.String) || flex.Cols[c].DataType == typeof(System.DateTime) || flex.Cols[c].DataType == typeof(System.Boolean) || flex.Cols[c].DataType == typeof(System.Byte) || flex.Cols[c].DataType == typeof(System.Char) || flex.Cols[c].DataType == typeof(System.SByte) || flex.Cols[c].DataType == typeof(System.Object))                        continue;                    flex.Subtotal(AggregateEnum.Sum, 0, -1, c, "合计");                    if (flex.Cols[c] != null && (flex.Cols[c].DataType == typeof(System.Int32) || flex.Cols[c].DataType == typeof(System.Decimal))) {                        decimal de = string.IsNullOrEmpty(Convert.ToString(flex.GetData(flex.Rows.Count - 1, c))) ? 0 : Convert.ToDecimal(flex.GetData(flex.Rows.Count - 1, c));                        flex.SetData(flex.Rows.Count - 1, c, de.ToString("0.00"));                    }                }                flex.SubtotalPosition = SubtotalPositionEnum.BelowData;                CellStyle s = flex.Styles[CellStyleEnum.Subtotal0];                s.BackColor = Color.White;                s.ForeColor = Color.Red;                flex.Tree.Column = 1;