我正在为一个www.example.com页面编写一个报告asp.net，我试图将这个linq语句的结果赋给一个现有的数据集，但是我收到了“Only primitive types or enumeration types are supported in this context.”错误消息。下面是我的代码：

var contextTable = new dbpersonnelEntities();                
   var contextHistory = new WriterInResidenceEntities();

   var rslt = (from c in contextTable.TableofOrganizationRpts
            where !(from o in contextHistory.emp_history
            select o.employeeID).Contains((int)c.employeeid_fk)
                       select c).ToList();

   ReportDataSource r = new ReportDataSource("tableOfOrgDS", rslt);