C# 如何在SvcClient实体中调用内部联接？

调用webservice调用时如何插入连接实体

SELECT 
      distinct [COMMITTEE_MAST_CUST]      
  FROM [PDEV].[dbo].[COM_COMMITTEE_MEMBER] cc Inner join CUSTOMER c 
  on c.MASTER_CUSTOMER_ID = cc.COMMITTEE_MAST_CUST
  where MEMBER_MAST_CUST = '0827857' and cc.END_DATE > GETDATE()  
 and c.CUSTOMER_CLASS_CODE IN ('SECTION_OFFICER','CHAPTER_OFFICER')

但是现在使用上面的查询，我们不知道在这个查询中应该把join放在哪里

SvcClient.Client.Context.ComCommittees.Where(x => x.MemberMasterCustomer 
        == masterCustomerId  && x.EndDate > DateTime.Today.AddMonths(-3)).ToList();

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我不确定您的上下文是如何定义的（SvcClient.Client.Context.comcomcommittees是否对应于[PDEV].[dbo].[COM_COMMITTEE_MEMBER]？），但我相信您会将.Join放在.Where子句之前

大概是这样的：

SvcClient.Client.Context.ComCommittees.Join(Customer, mast => id.COMMITTEE_MAST_CUST, cust=>cust.MASTER_CUSTOMER_ID, (mast, cust) => new { cc = mast, c = cust }).Where(x => x.MemberMasterCustomer 
        == masterCustomerId  && x.EndDate > DateTime.Today.AddMonths(-3)).ToList();

虽然应该考虑在查询语法中写：

var myResult = (from cc in SvcClient.Client.Context.ComCommittees
join customer in CustomerContext on cc.COMMITTEE_MAST_CUST equals customer.MASTER_CUSTOMER_ID
where (cc.MemberMasterCustomer == masterCustomerId) && (cc.EndDate > DateTime.Today.AddMonths(-3))).ToList()

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（我不确定您的一些变量名称，但这是基本jist）

中的c.CUSTOMER\u CLASS\u代码（'SECTION\u OFFICER'，'CHAPTER\u OFFICER'）&&[“SECTION\u OFFICER”，“CHAPTER\u OFFICER”]包含（CUSTOMER.CUSTOMER\u CLASS\u代码）如何