public IActionResult AddCourse(AddCourseVM addCourseVM)
        {
            Guid teacherId = Guid.Parse(User.Claims.FirstOrDefault(c => c.Type == ClaimTypes.NameIdentifier).Value);

            _teacherService.AddCourse(teacherId, addCourseVM.Title);
            return(RedirectToAction(nameof(Dashboard)));
        }
        public IActionResult OnPost()
        {
            if (!ModelState.IsValid)
            {
                return(Page());
            }
            var result = _db.AddCourse(Course);

            if (result)
            {
                TempData["SM"] = $"Course {Course.CourseName} has been successfully edited";
            }
            else
            {
                TempData["FM"] = $"Course {Course.CourseName} editing failed";
            }

            if (result)
            {
                return(RedirectToPage("AllCourses"));
            }
            else
            {
                ModelState.AddModelError(string.Empty, "Course not created");
                return(Page());
            }
        }
 public async Task <bool> AddCourse(int courseId, int teacherId)
 {
     return(await service.AddCourse(courseId, teacherId));
 }