c# - ASP.NET MVC 5 实体连接

Question

我是 ASP、Entity 和 lambda 表达式的新手。如何连接两个表？

路线模型:

public partial class Route
{
    public Route()
    {
        Flights = new HashSet<Flight>();
    }

    public int RouteID { get; set; }

    public int DepartureAirportID { get; set; }

    public int ArrivalAirportID { get; set; }

    public int FlightDuration { get; set; }

    public virtual Airport Airport { get; set; }

    public virtual Airport Airport1 { get; set; }

    public virtual ICollection<Flight> Flights { get; set; }
}

机场型号:

public partial class Airport
{
    public Airport()
    {
        Routes = new HashSet<Route>();
        Routes1 = new HashSet<Route>();
    }

    public int AirportID { get; set; }

    public string City { get; set; }

    public string Code { get; set; }

    public virtual ICollection<Route> Routes { get; set; }

    public virtual ICollection<Route> Routes1 { get; set; }
}

SQL 查询如下所示:

SELECT a.AirportID, a.City
FROM Route r INNER JOIN Airport a ON r.ArrivalAirportID = a.AirportID
WHERE r.DepartureAirportID = @departureAirportID
ORDER BY a.City

很抱歉这个简单的问题，但我不知道如何使用 Entity Framework 来做到这一点......

Answer 1

像这样的事情应该做(未经测试，只是从你的查询中继续)使用硬编码的变量):

using (var db = new YourDbContext())
{
    var query = from r in db.Route
                join a in db.Airport a on r.ArrivalAirportID equals a.AirportID
                where r.DepartureAirportID = 1 // replace with your varialble.
                orderby a.City
                select a;
}