SQL to LINQ - AND声明左连接

Question

我有这个SQL查询得到所有警察的名字，没有分配到指定的警车。

SELECT policename 
FROM police 
LEFT OUTER JOIN policecar 
ON police.policeid = policecar.policeid 
AND carid = 1 
WHERE policecar.policeid IS NULL 

我想将该查询转换为LINQ，但我很难转换AND和WHERE语句。请给我任何指示，谢谢。

Answer 1

试试这个：

var result = 
    from police in polices 
    join policecar in policecars.Where(x => x.carid == 1) 
      on police.policeId equals policecar.policeId into res 
    where !res.Any() 
    select police.policeName;