在DataGrid中实现数据汇总

在DataGrid中实现数据汇总

SQL语句

SELECT     CASE   GROUPING (o.customerid)  WHEN   0   THEN  o.customerid  ELSE   ' (Total) '   END   AS  MyCustomerID, 
   CASE   GROUPING (od.orderid)  WHEN   0   THEN  od.orderid  ELSE   - 1   END   AS  MyOrderID,   
SUM (od.quantity * od.unitprice)  AS  price 
FROM  Orders o,  [ Order Details ]  od 
WHERE   Year (orderdate)  =   1998  
AND  od.orderid = o.orderid 
GROUP   BY  o.customerid, od.orderid  WITH  ROLLUP 
ORDER   BY  o.customerid, price

在DataGrid中添加ItemCreated事件

         private   void  dgOrder_ItemCreated( object  sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
         {
            ListItemType itemType = e.Item.ItemType;

            if (itemType == ListItemType.Item || itemType == ListItemType.AlternatingItem) 
            {
                DataRowView drv = (DataRowView) e.Item.DataItem;
                if (drv != null)
                {
                    if ((int) drv["MyOrderID"] == -1)
                    {
                        e.Item.BackColor = Color.White;  
                        e.Item.Font.Bold = true;
                        e.Item.Cells.RemoveAt(1);            
                        e.Item.Cells[0].ColumnSpan = 2;        
                        e.Item.Cells[1].HorizontalAlign = HorizontalAlign.Right;
                    }
                }
            }
        }

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