/// <summary>
/// x修改老师的课程信息
/// </summary>
/// <param name="selectCourse">选中的课程</param>
/// <param name="instructor">修改的老师</param>
private void UpdateInstructorsCourse(string[] selectCourse, Instructor instructor)
{
if (selectCourse == null)
{
instructor.courseAssignments = new List <CourseAssignment>();
return;
}
var selectcourseHS = new HashSet <string>(selectCourse);
var instructorCourse = new HashSet <int>(instructor.courseAssignments.Select(a => a.CourseId));
foreach (var Course in _context.Course)
{
if (selectcourseHS.Contains(Course.CourseId.ToString()))
{
if (!instructorCourse.Contains(Course.CourseId))
{
instructor.courseAssignments.Add(new CourseAssignment()
{
InstructorId = instructor.Id,
CourseId = Course.CourseId
});
}
}
else
{
if (instructorCourse.Contains(Course.CourseId))
{
var CourseToRemove = instructor.courseAssignments.SingleOrDefault(a => a.CourseId == Course.CourseId);
_context.Remove(CourseToRemove);
}
}
}
}
