SQL to LINQ - AND聲明左連接

Question

我有這個SQL查詢得到所有警察的名字，沒有分配到指定的警車。

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

我想將該查詢轉換爲LINQ，但我很難轉換AND和WHERE語句。請給我任何指示，謝謝。

Answer 1

試試這個：

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;