C# 它是 public ActionResult ShowAvailableSpots(int Id, DateTime ArrivalDate, DateTime LeaveDate) { var query2 = (from r in db.Res
它是C# 它是 public ActionResult ShowAvailableSpots(int Id, DateTime ArrivalDate, DateTime LeaveDate) { var query2 = (from r in db.Res,c#,asp.net,sql-server,linq,asp.net-mvc-5,C#,Asp.net,Sql Server,Linq,Asp.net Mvc 5,它是 public ActionResult ShowAvailableSpots(int Id, DateTime ArrivalDate, DateTime LeaveDate) { var query2 = (from r in db.Reservations where (DbFunctions.TruncateTime(r.ArrivalDate) >= DbFunctions.TruncateTime(ArrivalDate)
public ActionResult ShowAvailableSpots(int Id, DateTime ArrivalDate, DateTime LeaveDate)
{
var query2 = (from r in db.Reservations
where (DbFunctions.TruncateTime(r.ArrivalDate) >= DbFunctions.TruncateTime(ArrivalDate)
&& DbFunctions.TruncateTime(r.LeaveDate) <= DbFunctions.TruncateTime(LeaveDate))
select r.spot);
ViewBag.StartingDate = ArrivalDate;
ViewBag.EndingDate = LeaveDate;
ViewBag.AvailableSpots = query2;
ViewBag.CampingSpotId = new SelectList(query2, "CampingSpotId", "SpotName");
return View();
}
SELECT
[Extent2].[campingspotid] AS [CampingSpotId],
[Extent2].[spotname] AS [SpotName],
[Extent2].[fieldname] AS [FieldName],
[Extent2].[surface] AS [Surface],
[Extent2].[wifi] AS [Wifi],
[Extent2].[water] AS [Water],
[Extent2].[sewer] AS [Sewer],
[Extent2].[reserved] AS [Reserved],
[Extent2].[booked] AS [Booked],
[Extent2].[spotprice] AS [SpotPrice],
[Extent2].[type] AS [Type]
FROM
[dbo].[reservations] AS [Extent1]
INNER JOIN
[dbo].[campingspots] AS [Extent2]
ON [Extent1].[campingspotid] = [Extent2].[campingspotid]
WHERE
(
(
CONVERT (DATETIME2, CONVERT(VARCHAR(255), [Extent1].[arrivaldate], 102), 102 )
) >= (
CONVERT (DATETIME2, CONVERT(VARCHAR(255), @p__linq__0, 102), 102 )
)
)
AND (
(
CONVERT (DATETIME2, CONVERT(VARCHAR(255), [Extent1].[leavedate], 102), 102)
) <= (
CONVERT (DATETIME2, CONVERT(VARCHAR(255), @p__linq__1, 102 ), 102)
)
)
public class Reservation
{
[Key]
public int ReservationId { get; set; }
[DataType(DataType.Date)]
public DateTime ArrivalDate { get; set; }
[DataType(DataType.Date)]
public DateTime LeaveDate { get; set; }
//Vreemdesleutel van Plek
public int CampingSpotId { get; set; }
public virtual CampingSpot spot { get; set; }
}
public class CampingSpot
{
[Key]
[Required(ErrorMessage = "Please select at least one CampingSpotID")]
public int CampingSpotId { get; set; }
public string SpotName { get; set; }
}
var res = db.Reservations.Where(c => DbFunctions.TruncateTime(c.ArrivalDate) >= DbFunctions.TruncateTime(ArrivalDate)
&& DbFunctions.TruncateTime(c.LeaveDate) <= DbFunctions.TruncateTime(LeaveDate)
&& c.CampingSpotId == null);
FROM CampingSpots cs
LEFT JOIN Reservations r
WHERE r.ID IS NULL
public class Reservation
{
public DateTime ArrivalDate { get; set; }
public DateTime LeaveDate { get; set; }
}
public class CampingSpot
{
public virtual Reservation Reservation { get; set; }
}
public class TestClass
{
public void Test()
{
var CampingSpots = new List<CampingSpot>().AsQueryable();
var ArrivalDate = new DateTime();
var LeaveDate = new DateTime();
var res = CampingSpots.Where(c => DbFunctions.TruncateTime(c.ArrivalDate) >= DbFunctions.TruncateTime(ArrivalDate)
&& DbFunctions.TruncateTime(c.LeaveDate) <= DbFunctions.TruncateTime(LeaveDate)
&& c.Reservation == null)
).ToList();
}
}
public class CampingSpot
{
[Key]
[Required(ErrorMessage = "Please select at least one CampingSpotID")]
public int CampingSpotId { get; set; }
public string SpotName { get; set; }
public virtual int ReservationId { get; set; }
}
public ActionResult ShowAvailableSpots(int Id, DateTime ArrivalDate, DateTime LeaveDate)
{
var query2 = db.CampingSpots.Where(c => DbFunctions.TruncateTime(c.ArrivalDate) >= DbFunctions.TruncateTime(ArrivalDate)
&& DbFunctions.TruncateTime(c.LeaveDate) <= DbFunctions.TruncateTime(LeaveDate)
&& c.Reservation == null)
).ToList();
ViewBag.StartingDate = ArrivalDate;
ViewBag.EndingDate = LeaveDate;
ViewBag.AvailableSpots = query2;
ViewBag.CampingSpotId = new SelectList(query2, "CampingSpotId", "SpotName");
return View();
}
var query2 = db.CampingSpots
.Where(c => !db.Reservations.Any(r =>
DbFunctions.TruncateTime(r.ArrivalDate) >= DbFunctions.TruncateTime(ArrivalDate)
&& DbFunctions.TruncateTime(r.LeaveDate) <= DbFunctions.TruncateTime(LeaveDate)
)).ToList();
1234567 < --- Day
|---| < --- Reservation
|---| < --- Query
var query2 = db.CampingSpots
.Where(c => !db.Reservations.Any(r =>
(DbFunctions.TruncateTime(r.ArrivalDate) >= DbFunctions.TruncateTime(ArrivalDate)
&& DbFunctions.TruncateTime(r.ArrivalDate) < DbFunctions.TruncateTime(LeaveDate))
||
(DbFunctions.TruncateTime(r.LeaveDate) <= DbFunctions.TruncateTime(LeaveDate)
&& DbFunctions.TruncateTime(r.LeaveDate) > DbFunctions.TruncateTime(ArrivalDate))
)).ToList();