public IActionResult Enroll(string courseId)
{
ActionResult result = null;
int _studentId = CurrentUser.Id;
try
{
if (!ModelState.IsValid)
{
throw new Exception();
}
try
{
List <Course> courses = (List <Course>)_coursedb.GetStudentCourses(_studentId);
StudentCourse studentCourse = new StudentCourse()
{
courseId = Convert.ToInt32(courseId),
userId = _studentId
};
foreach (Course course in courses)
{
if (course.Id == studentCourse.courseId)
{
throw new Exception("Course has already been enrolled.");
}
}
_coursedb.EnrollStudent(studentCourse);
}
catch (EnrollmentFailedException)
{
ModelState.AddModelError("enrollment-failed", "Enrollment in this course failed.");
throw;
}
result = RedirectToAction("Dashboard", "Student", new { studentId = CurrentUser.Id });
}
catch (Exception ex)
{
result = RedirectToAction("Browse", "Student");
TempData["error"] = ex.Message;
}
return(result);
}
