【代码笔记】c# Linq操作DataTable
作者:互联网
首先:添加引用
项目添加引用 System.Data.DataSetExtensions
注意下面代码 AsEnumerable()方法的使用
数据库访问代码
public DataTable AllianceOrderDataStats(string sqlWhere)
{
StringBuilder commandText = new StringBuilder();
commandText.Append($@"
select
groupkey='groupkey',
orders.oid,
orders.osn,
orders.uid,
orders.orderstate,
orders.productamount,
orders.orderamount,
orders.addtime,
orders.storeid,
orders.storename
from (select storeid from bma_storein where storeid>0 {sqlWhere}) as storeIdTable
inner join bma_orders as orders on storeIdTable.storeid=orders.storeid
");
return RDBSHelper.ExecuteDataset(CommandType.Text, commandText.ToString()).Tables[0];
}
业务代码
第一步:获取数据
EnumerableRowCollection<DataRow> orderDataTable = Orders.AllianceOrderDataStats(sqlWhere.ToString()).AsEnumerable();
//订单总和
resultModel.orderCount = orderDataTable.Count();
第二步:根据【groupkey】分组后统计【orderamount】的合
var orderMoneyCount = from orderTable in orderDataTable
where orderTable["orderstate"].ToString()=="100"
group orderTable by orderTable["groupkey"] into groupkey
select new { MoneyCount = groupkey.Sum(dr=> Convert.ToDecimal(dr["orderamount"])) };
//获取orderamount合
resultModel.orderMoneyCount = orderMoneyCount.SingleOrDefault().MoneyCount;
标签:groupkey,c#,storeid,Linq,orders,select,orderamount,DataTable,orderTable 来源: https://blog.csdn.net/cplvfx/article/details/121567237