C# 如何将SQL连接查询转换为c LINQ到实体？

我有一个内部联接查询：

Select  Clients.ClientName, 
        InspectionAuthorities.Description,
        COUNT(DISTINCT  ObjectTypes.Description) AS NumberOfObjectTypes 
From InspectionArchives 
--Customer--
Inner Join Clients On InspectionArchives.CustomerID = Clients.Id 
--Inspection Authority--
Inner Join InspectionAuthorityInspectionArchives On InspectionArchives.Id = InspectionAuthorityInspectionArchives.InspectionArchive_Id
Inner Join InspectionAuthorities  On InspectionAuthorityInspectionArchives.InspectionAuthority_Id = InspectionAuthorities.Id  
--Object Types--
Inner Join ObjectTypeInspectionArchives On InspectionArchives.Id = ObjectTypeInspectionArchives.InspectionArchive_Id
Inner Join ObjectTypes On ObjectTypeInspectionArchives.ObjectType_Id = ObjectTypes.Id
Where Clients.Id = 1 or Clients.Id = 2
Group by Clients.ClientName, InspectionAuthorities.Description;

我对LINQ world比较新，需要将上面的SQL查询转换为C LINQ to Entity

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你知道我该如何实现它吗？

首先，你至少应该自己尝试转换它。再次阅读并学习如何使用EF为您创建的导航属性。

from IA in contextObj.InspectionArchives 
join cl in contextObj.Clients on IA.CustomerID equals Cl.Id
join IaIa in contextObj.InspectionAuthorityInspectionArchives On IA.Id equals IaIa .InspectionArchive_Id
join IAuth in contectObj.InspectionAuthorities on IaIa.InspectionAuthority_Id equals IAuth.Id  
join OTIA in contextObj.ObjectTypeInspectionArchives on IA.Id equals OTIA.InspectionArchive_Id
join ObjT in contextObj.ObjectTypes on OTIA.ObjectType_Id equals ObjT.Id
where (Cl.Id = 1 || Cl.Id = 2)
group new {cl, IAuth} by new {Cl.ClientName, IAuth.Description} into grp
select new 
{
  clientName = grp.key.ClientName,
  Desc = grp.key.Description,
  NumberOfObjectTypes = grp.Count(g=>g.ObjT.Description.Distinct())
};