如何SQL转换为LINQ此查询

Question

我想把这个查询到LINQ转换，请帮忙：

select 
    mr_ssample.objectid, 
    mr_ssample.stcode 
from mr_ssample 
inner join mr_wsample on mr_ssample.objectid = mr_wsample.objectid 
         And mr_ssample.stcode in(select stcode 
               from mr_wsample) 

我想这在C＃中

var query = from ssamp in marineEntity.MR_SSAMPLE 
         join wsamp in marineEntity.MR_WSAMPLE on ssamp.OBJECTID equals wsamp.OBJECTID && ssamp.stcode.contains(wsamp.stcode) 
         select new 
         {}; 

但是，我无法访问wsamp在contains，或者我不知道这个选择。

Answer 1

试试这个，

var _result = from a in mr_ssample 
       join b in mr_wsample on a.objectid equals b.objectid 
       where (from c in mr_wsample select new {c.stcode}) 
         .Contains(new {a.stcode}) 
       select new {a.objectid, a.stcode}