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C linq or

var testcase =(from c in men.testcase where c.planid==planId orderbyDescing c.caseset_loop select c).FirstOrDefault() ;

SQL:select * from A,B where A.cpID=B.cpID and A.cbID=B.cbID LINQ:var p = from t1 in a from t2 in b from t3 in c where t1.cpid equal t2.cpid and t1.cbid equal t3.cbid select new { t1, t2.cpid }

LINQ 按多个字段排序(orderby、thenby、Take) orderby 子句解析为 OrderBy()方法,orderby descending 子句解析为OrderBy Descending()方法: var racers = Formula1.GetChampions(). Where(r = > r.Country == "Brazil"). OrderByDescending(...

select new 出来的是一个匿名对象,也就是包含c.ContactName跟o.OrderID这两个字段的对象。 如果你直接select c,只能选择Customers 中的字段,无法提取Orders 中的,而你的查询结果要求同时提取Customer的ContactName跟Order的OrderID 。

query = from c in tbs where != "类别" && c.path_tbname.Contains(tName.Text) orderby select c; Contains 等于 like '%'+tName.Text+'%'

SumA = (from c in vSession.Linq() select c.a).Sum(); CountB = (from c in vSession.Linq() select c.b).Count(); ------解决方案-------------------- C# code//更改成这种形式 var query = from w in data.News select new { sum=data.News...

你想修改全部的对象的ClientName吗? foreach(TcpClientState tcs in clients) { tcs.ClientName="你要修改的只" } 完成后 clients中ClientName的值就...

string[] ids = (from DeductionBill in t_ds_DeductionBill where t_ds_DeductionBill .BillNumber.Equals(c.BillNumber)) .ToArray(); TotalWeight= (from Order in t_kd_Order where(item => ids.Contains(item.OrderID)) select Order.Total...

var value=(from v in db.tbl select;

var a =from c in TongXunLu selectc.classId,count(c.classid) as sum grounp by c.classid foreach(var item in a) { console.writeline(item); }

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