如何在实体框架中执行嵌套查询

Question

I am searching to map a nested foreach loop as Entity Framework query but have failed so far. Can anyone help me with this?

Thanks in advance.

This is the loop I want to map.

foreach (var v in db.Users)
{
    if(v.Active == 1)
    {
        foreach(Role r in v.Roles)
            if(r.Name.Equals("Management"))
                us.Add(v);
    }
}

var sa = (from u in db.Users
          where u.Roles == from r in db.Roles
          where r.Name == "Management" select r).ToList();

Answer 1

Try this one:

var result = db.Users.Where(u => u.Active && u.Roles.Any(r => r.Name.Equals("Management"))).ToList();

PS It seems that you forgot to add continue inside your "if(r.Name.Equals("Management"))".