一.EF的左连接 在EF中,当在dbset使用join关联多表查询时,连接查询的表如果没有建立相应的外键关系时,EF生成的SQL语句是inner join(内联),对于inner join,有所了解的同学都知道,很多时候这并不是我们的本意,实例如下: var list = from o in context.CTMS_OD_ORDERS join d in context.CTMS_SUP_DOCTOR on o.OWNERDOCID equals d.USERID join e in cont…
增加 using(var db = new Entities()) { //数据操作 UserInfo user = new UserInfo() { UserName = "zhangsan1", UserPass = " }; db.UserInfo.Add(user); db.SaveChanges(); } 删除 先查询-再删除 using (var db = new Entities()) { var user = (from v in db.UserInfo se…
