Question

我正在为一所学校安排课程，为可用的课堂分配课程。我有这样的树表（简化）：

TCourse：CourseID，CourseCode，Hours，Capacity，ScheduleID ......

TClassroom：ClassroomID，ClassroomName，Quota ...

TCourseClassroom：CourseClassroomID，CourseID，ClassroomID，StartHour，FinishHour，ScheduleID

08：00-20：00之间的小时

下面的代码逐个获取课程，并为他们分配最近容量的课堂，然后更新课堂以签署使用课堂。（代码翻译成英文供您阅读和理解）

    public ActionResult Schedule()
    {
        int[] hours = { 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 };

        using (ApsContext db = new ApsContext())
        {
            List<TCourse> courses = new List<TCourse>();
            List<TClasssroom> clasRooms = new List<TClasssroom>();
            int lastScheduleId = 0;

            courses = db.TCourse.OrderBy(x => x.Quota).ToList();

            foreach (var itemCourse in courses)
            {
                var clasRoom = db.Classroom.Where(x => x.PlanID == lastScheduleId && x.Capacity >= itemCourse.Quota).OrderBy(x => x.Capacity).FirstOrDefault();

                if (classRoom != null)
                {
                    var courseId = itemCourse.CourseID;
                    var classRoomId = clasRoom.ClassroomID;
                    var scheduleId = itemCourse.ScheduleID + 1;

                    db.Entry(classRoom).Entity.ScheduleID = scheduleId;
                    db.SaveChanges();

                    CourseClassroom newCourseClassroom = new CourseClassroom();
                    newCourseClassroom.CourseID = courseId;
                    newCourseClassroom.ClasssroomID = classRoomId;
                    newCourseClassroom.ScheduleID = scheduleId;

                    db.TCourseClassroom.Add(newCourseClassroom);
                    db.SaveChanges();
                }
            }
            return RedirectToAction("Schedule");
        }
    }

此代码只使用一次课程，但课堂上有12小时。想想所有课程都是2小时。所以我需要每天使用该教室6次。我无法想象出这个目的的最佳方式。我想更新教室使用数小时的数据库或者我应该只用代码吗？任何想法都会有所帮助。提前谢谢。

Answer 1

我有一个解决方案，但也许不是最快的解决方案。

删除.FirstOrDefault();句子，因此在var classRoom中你有一个Enumerable，其中包含课程所需的所有课程。
Foreach教室，在包含此教室的TCourseClassroom所有CourseClassroom中找到并使用EndHour进行订购。
检查您是否课程时数加上CourseClassroom的EndHour小于20，如果是，您可以将课程列入本课程。

public ActionResult Schedule（）{

int[] hours = { 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 };

using (ApsContext db = new ApsContext())
{
    List<TCourse> courses = new List<TCourse>();
    List<TClasssroom> clasRooms = new List<TClasssroom>();
    int lastScheduleId = 0;

    courses = db.TCourse.OrderBy(x => x.Quota).ToList();

    foreach (var itemCourse in courses)
    {
        var classRoomList = db.Classroom.Where(x => x.PlanID == lastScheduleId && x.Capacity >= itemCourse.Quota).OrderBy(x <= x.Capacity);

        TClasssroom availableClassRoom;

        foreach(TClasssroom classRoom in classRoomList)
        {
            TCourseClassroom courseClassroomList = db.TCourseClassroom.FindAll(x => x.ClassroomID == clasRoom.ClassroomID).OrderBy(x > x.EndHour).First();


            if(courseClassroomList == null)
            {
                availableClassRoom = classRoom;
            }
            else
            {
                if(courseClassroomList.EndHour + itemCourse.Hour <= 20)
                {
                    availableClassRoom = classRoom;
                }

            }   

        }
        if (availableClassRoom != null)
        {
            var courseId = itemCourse.CourseID;
            var classRoomId = clasRoom.ClassroomID;
            var scheduleId = itemCourse.ScheduleID + 1;

            db.Entry(classRoom).Entity.ScheduleID = scheduleId;
            db.SaveChanges();

            CourseClassroom newCourseClassroom = new CourseClassroom();
            newCourseClassroom.CourseID = courseId;
            newCourseClassroom.ClasssroomID = classRoomId;
            newCourseClassroom.ScheduleID = scheduleId;

            db.TCourseClassroom.Add(newCourseClassroom);
            db.SaveChanges();
        }
    }
    return RedirectToAction("Schedule");
}

}

使用C＃进行课程安排

1 个答案: