将我的存储过程更改为 Linq答案

【问题标题】：Changing my stored procedure to Linq将我的存储过程更改为 Linq
【发布时间】：2018-02-09 18:32:46
【问题描述】：

我有一个关于如何将以下内容转换为 linq 的问题。我一直在尝试了解 ASP.NET MVC，而对我来说最大的障碍之一是 Linq。

CREATE PROCEDURE [dbo].[SelectAvailableCoops]
    @startDate DATETIME, @endDate DATETIME
AS
BEGIN
    SET NOCOUNT ON;

    SELECT ID, coopName, coopCPN
    FROM tbl_Coops
    WHERE ID NOT IN (SELECT coopID
                     FROM tbl_bookings 
                     WHERE (startDate <= @startDate AND endDate >= @startDate)
                        OR (startDate < @endDate AND endDate >= @endDate)
                        OR (@startDate <= startDate AND @endDate >= endDate)
                    )
END
GO

如果有帮助，目前我的操作结果中有以下内容。

BookingsListVM bookinglist = new BookingsListVM();
//bookinglist.Customers = db.Customers.ToList();
bookinglist.Customers = (from c in db.Customers select c).ToList();
bookinglist.CustomerBookings = (from cb in db.CustomerBookings select cb).ToList();
bookinglist.Coops = (from co in db.Coops select co).ToList();

【问题讨论】：

标签： c# asp.net-mvc linq

【解决方案1】：

这里有一个

db.Customers.Where(x=> db.CustomerBookings.Any(a=> a.coopID != x.Id && 
((a.StartDate <= startDate && a.EndDate >= enddate)
|| 
(a.StartDate < endDate && a.EndDate >= enddate)
||
(a.StartDate <= startDate && a.EndDate >= endDate)
)));

【讨论】：

非常感谢

【解决方案2】：

另一个答案看起来更好，但这里有一个稍长的解决方案，希望更容易理解。

  //Returns IDs
       var bookingIds = tbl_bookings
             .Where(b => b.ReleaseDate <= startDate && b.ReleaseDate >= endDate
                 || (b.ReleaseDate < endDate && b.ReleaseDate >= endDate)
                 || (b.ReleaseDate <= startDate && b.ReleaseDate >= endDate))
             .Select(b => b.Id);

  //Returns anonymous object list containing all records
  //with an ID not found in previous result set
       var bookings = tbl_bookings.Where(b => !bookingIds.Contains(b.Id))
             .Select(b => new { ID = b.Id, CoopName = b.Id, coopCPN = b.Id })
             .ToList();

【讨论】：

非常感谢