C# LINQ Join两个表连接,关联多个条件的写法

--- #### 1、sql语句: ```sql select * from Users u join Teachers t on u.UserID==t.TeacherID and u.Name=t.Name ``` #### 2、linq写法: 1)、方法一: 将多个字段的比较,new 一个对象进行比较; 注意:对象的属性名要保持一致; ```csharp var userInfos = from u in db.Users join t in db.Teachers on new { u.UserID , u.Name } equals new { UserID = t.TeacherID,t.Name } select new { ID=u.UserID, t.Name }; ``` 2)、方法二: ```csharp var userInfos = from u in db.Users from t in db.Teachers where u.UserID == t.TeacherID && u.Name == t.Name select new { ID=u.UserID, t.Name }; ``` ---
posted @ 2019-11-16 17:37  willingtolove  阅读(12916)  评论(0编辑  收藏  举报