如何从实体框架联接表中获取数据？

Question

I'm using entity frame work . I create a function using 3 tables.

this is my code:

public static IQueryable GetMenuContent()
{            
    string roleName ="ADMIN"

    var query1 = from ua in db.USER_ACCESS
                 join p in db.PAGES on ua.PAGE_ID equals p.PAGE_ID
                 join r in db.ROLES on ua.ROLE_ID equals r.RoleId
                 where (r.RoleName == roleName)
                 select new
                 {
                     tuserAccess = ua,
                     tpage = p,
                     trole = r,
                 };            

    return query1;
}

So in my master page I need to check the USER_ACCESS table -> PAGE_NAME .

So I try like this

@foreach (var item in pro.Models.SiteContentModel.GetMenuContent())
{
      switch (((DAL.PAGES)(item)).PAGE_NAME)
      {
           case "details":
                if (((DAL.USER_ACCESS)(item)).ACC_STATUS == true)
                {
                     <li>@Html.ActionLink("details", "Index", "Business")</li>
                }
                break;                
       }
}

but it is not working.. How can I do it..

Answer 1

You should use navigation properties instead of joins in your case.

But in your case you should rewrite your foreach:

@foreach (var item in pro.Models.SiteContentModel.GetMenuContent())
{
      switch (item.tpage.PAGE_NAME)
      {
           case "details":
                if (item.tuserAccess.ACC_STATUS == true)
                {
                     <li>@Html.ActionLink("details", "Index", "Business")</li>
                }
                break;                
       }
}

Answer 2

Try modifiyi g the method as follow. Your anonymous objcet's property accsing is changed.

((DAL.t_PAGES)(item)).tpage.PAGE_NAME ((DAL.USER_ACCESS)(item)).tuserAccess.ACC_STATUS

@foreach (var item in pro.Models.SiteContentModel.GetMenuContent())
{
      switch (((DAL.t_PAGES)(item)).tpage.PAGE_NAME)
      {
           case "details":
                if (((DAL.USER_ACCESS)(item)).tuserAccess.ACC_STATUS == true)
                {
                     <li>@Html.ActionLink("details", "Index", "Business")</li>
                }
                break;                
       }
}