使用XtraGrid自定义列计算 z

private void simpleButton1_Click(object sender, EventArgs e)
        {
            // 定义主表
            DataTable masterTable = new DataTable("MasterTable");
            DataColumn parentColumn = new DataColumn("masterId", typeof(int));
            masterTable.Columns.Add(parentColumn);
            masterTable.Columns.AddRange(new DataColumn[]{
             new DataColumn("name",typeof(string)),
            });
            masterTable.Rows.Add(1, "class1");
            masterTable.Rows.Add(2, "class2");
            masterTable.Rows.Add(3, "class3");

            // 定义子表
            DataTable detailTable = new DataTable("DetailTable");
            DataColumn childrenColumn = new DataColumn("masterId", typeof(int));
            detailTable.Columns.Add(childrenColumn);

            detailTable.Columns.AddRange(new DataColumn[] {
             new DataColumn("id",typeof(int)),
             new DataColumn("name",typeof(string)),
             new DataColumn("age",typeof(string))
            });

            detailTable.Rows.Add(1, 1, "student1", "age1");
            detailTable.Rows.Add(2, 2, "student2", "age2");
            detailTable.Rows.Add(2, 3, "student3", "age3");
            detailTable.Rows.Add(2, 4, "student4", "age4");
            detailTable.Rows.Add(3, 5, "student5", "age5");
            detailTable.Rows.Add(3, 6, "student6", "age6");
            detailTable.Rows.Add(3, 7, "student7", "age7");
            detailTable.Rows.Add(3, 8, "student8", "age8");


            using (DataSet ds = new DataSet())
            {
                ds.Tables.AddRange(new DataTable[] { masterTable.Copy(), detailTable.Copy() });
                // 创建表关系
                DataRelation relation = new DataRelation("detailTable", ds.Tables[0].Columns[0], ds.Tables[1].Columns[0], false);
                ds.Relations.Add(relation); // 添加
                gridControl1.DataSource = ds.Tables[0];  // 指定数据源
            }
        }