本文介绍了linq关节类型推断无法调用"join"错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有3个表User，TeamMember和Assessment，所有三个表都有user_id列，User通过userid与TeamMember链接，而TeamMember和Assessment与user_id(TeamMember)&评分者，已评分(评估)
i have 3 tables User, TeamMember and Assessment all three have the user_id column, User is linked to TeamMember by userid and TeamMember and Assessment are linked with user_id(TeamMember) & rater,rated(Assessment)
我正在尝试与此
from a in db.Assessments
join u in db.Team_Members on a.rated equals u.user_id
join u2 in db.Team_Members on a.rater equals u2.user_id
抛出此错误
知道发生了什么吗?
推荐答案
您需要确保a.rated/u.user_id和a.rater/u2.user_id是同一类型
You need to make sure a.rated / u.user_id and a.rater / u2.user_id are the same type
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