如何在ASP中处理复杂的查询。净MVC 3 ?

Although the problem I'll be detailing in this question is quite specific, I guess it should help some other beginner programmers like me. I have this following situation: in the system I'm designing, the user has the option to set the values for his search in the database (instead of just routing the parameter of the controller action to the id of a object in the database, as I've done before), with the following fields:Although the problem I'll be detailing in this