1.datatable.compute("max(列名)","")
eg: int max_Idx_Number = 1;
int.TryParse(Convert.ToString(dtGvModel.Compute("max(" + POR_WORK_ORDER_REC_FIELDS.FIELD_IDX_NUMBER + ")", "")), out max_Idx_Number); 2.Column.Expression = "max(数据列名)"; 3.用视图来排序
firstView = dt.DefaultView firstView.Sort = "数据列名 DESC" maxvalue = firstView.Item(0).Item(0) 4.tbl.Select("", "columnName Asc")(0)(columnName)