linq联合查询例子-创新互联

where_model wm=new where_model ();
   wm.kid = 58;
   IList mlist = BasicDataProxy.teacher_GetList(wm);

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   IList klist = BasicDataProxy.kin_roleinfo_GetList(wm);

   mlist = (from x in mlist
             where (x.title == "" && x.did != 1324 && x.userid>0)
             orderby x.did
             select x
             ).ToList();

   var list = (from x in mlist
               join p in klist on x.kid equals p.kid
               where (p.rid > 1000)
                select new kininfo()
               {

                   kid=x.kid,
                   rid=p.rid,
                   title=x.title,
                   uname=x.uname
               });

var list = (from x in mlist
               join p in klist on x.kid equals p.kid
               where (p.rid > 1000)
               group p by new {
                   x.kid,
                   x.uname
               }into g
               select new kininfo()
               {

                   kid = g.Count(),
                   rid = g.Sum(x=>x.rid+g.Key.kid),
                   uname=g.Key.uname
               });

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