linq to entity常用操作

Posted 2020-07-23 王磊的博客

一、聚合函数查询

double sum = 0;
using (xxxEntities db = new xxxEntities())
{
    sum = db.userinfo.AsNoTracking().Where(d => d.id==id).Sum(m => (double?)m.money).GetValueOrDefault();
}
return sum;