的LINQ如何連接表與每個表where子句和計數

Question

以下LINQ查詢時，不允許我使用了多個地方的元素 - 它停止順心「到」：

var query = 
from ph in _db.PlayHits 
join ua in _db.UserAgents on ph.UserAgentId equals ua.UserAgentId 
where (ph.VideoId == 1 && ua.AgentString.Contains("test")) 
into hits 
select new 
{ 
     ResultCount = hits.Count() 
}; 

任何想法爲什麼或者我如何修改這個？

的equivilent SQL我想要的是：

select count(*) as ResultCount 
from Playhits ph 
join UserAgents ua on ph.UserAgentId = ua.UserAgentId 
where ph.VideoId = 1 
and ua.AgentString like '%test%' 

Answer 1

據我瞭解，結果的計數可以使用擴展methond Count如下進行。

var query = 
    from ph in _db.PlayHits 
    join ua in _db.UserAgents on ph.UserAgentId equals ua.UserAgentId 
    where (ph.VideoId == 1 && ua.AgentString.Contains("test")); 
int Result = query.Count();