public static void EnrollStudent(StudentCourse studentCourse)
{
if (studentCourse != null)
{
using (var context = new EFCoreRefContext())
{
Student student = context.Student.FirstOrDefault(s => s.ID == studentCourse.StudentID);
Course course = context.Course.FirstOrDefault(c => c.ID == studentCourse.CourseID);
if (student != null && course != null)
{
//The student and course exist
StudentCourse CurrentStudentCourses = context.StudentCourse
.Where(sc => sc.StudentID == studentCourse.StudentID)
.Where(sc => sc.CourseID == studentCourse.CourseID)
.FirstOrDefault();
if (CurrentStudentCourses == null)
{
//The student isn't currently enrolled so we are good to add them to the course
context.StudentCourse.Add(studentCourse);
context.SaveChanges();
}
}
}
}
}
public static void DeleteAll()
{
using (var context = new EFCoreRefContext())
{
context.Student.Clear();
context.SaveChanges();
}
}
public static List<Student> List()
{
using (var context = new EFCoreRefContext())
{
var students = context.Student
.ToList();
return students;
}
}
public static List<Course> List()
{
using (var context = new EFCoreRefContext())
{
var courses = context.Course
.ToList();
return courses;
}
}
public static List<Course> ListCourses(int studentID)
{
using (var context = new EFCoreRefContext())
{
//Get courses where the studentID is in the StudentCourses join table
var StudentCourses = context.Course
.Where(s => s.StudentCourses.Any(sc => sc.Student.ID == studentID))
.ToList();
return StudentCourses;
}
}
public static void AddStudent(Student student)
{
using (var context = new EFCoreRefContext())
{
if (student != null)
{
context.Student.Add(student);
context.SaveChanges();
}
}
}
public static void AddCourse(Course course)
{
using (var context = new EFCoreRefContext())
{
if (course != null)
{
context.Course.Add(course);
context.SaveChanges();
}
}
}
public static Student GetStudentByID(int studentID)
{
using (var context = new EFCoreRefContext())
{
var student = context.Student
.Include(s => s.StudentCourses).ThenInclude(c => c.Course)
.Where(s => s.ID == studentID)
.FirstOrDefault();
return student;
}
}
public static Course GetCourseByID(int courseID)
{
using (var context = new EFCoreRefContext())
{
var course = context.Course
.Include(c => c.StudentCourses).ThenInclude(s => s.Student)
.Where(c => c.ID == courseID)
.FirstOrDefault();
return course;
}
}
