1 可以,Linq to entity支持join多个表
2 每个事务一个ObjectContext,参考http://dotnetslackers.com/articles/ado_net/Managing-Entity-Framework-ObjectContext-lifespan-and-scope-in-n-layered-ASP-NET-applications.aspx
3 这个自己用partial class加第一次访问时计算值的属性就可以了吧?
The following is signature, not part of post
Please mark the post answered your question as the answer, and mark other helpful posts as helpful.
Visual C++ MVP