無法創建「匿名類型」類型的常量值。只有原始類型或枚舉類型在此上下文中受支持。在Linq C＃

Question

我想加入2-3列表中有來自數據庫的數據和2列表有數據作爲對象類型如何從中得到實際結果？ 這裏是我的代碼和對象列表

var calls = context.queued_calls; 

//to get classifications into list 
var classificationsToList = (from c in context.classifications 
          select new { c.classification_id, c.classification1 }).ToList(); 

//to get tha users from the user table 
var users = (from u in context.users 
      select new { u.user_id, u.first_name, u.last_name }).ToList(); 

//to get agents from agents table 
var agents = (from a in context.agents 
       select new { a.agent_id, a.user_id }).ToList(); 

這是四個列表中的對象，在這裏是我執行到它

var agentsClass = (from cs in calls 
        join ag in agents on cs.agent_id equals ag.agent_id 
        join u in users on ag.user_id equals u.user_id 
        join cls in classificationsToList on cs.classification_id equals cls.classification_id 
        group cs by new { cs.classification_id, cls.classification1, cs.agent_id, u.user_id } into clas       
        select new { agent_id = clas.Key.agent_id, user_id = clas.Key.user_id, classification = clas.Key.classification1, classifications_count = clas.Count() }).OrderBy(a => a.agent_id).ToList(); 

Answer 1

我得到了解決只是我需要做的轉換我的查詢調用列表並解決錯誤