public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
List <CourseInfo> CourseInfos = HttpContext.Session.Get <List <CourseInfo> >("CourseInfo");
user = HttpContext.Session.Get <ApplicationUser>("UserInfo");
Enrollment = await _context.Enrollment
.Include(e => e.ApplicationUser)
.Include(e => e.Section).FirstOrDefaultAsync(m => m.Id == id);
CourseInfos.RemoveAll(c => c.SectionId == Enrollment.SectionId);
HttpContext.Session.Set <List <CourseInfo> >("CourseInfo", CourseInfos);
Course = _context.Course.FirstOrDefault(c => c.Id == Enrollment.Section.CourseId);
Charge Charge = new Charge();
Charge.Reason = "Withdraw from " + Course.Subject + " " + Course.Number + " Section " + Enrollment.SectionId;
Charge.Date = DateTime.Now;
Charge.Amount = -1 * (Course.CreditHours * SD.CostPerCredit + Course.CourseFee);
Charge.StudentId = user.Id;
if (Enrollment != null)
{
DataAccessClass dataAccess = new DataAccessClass();
dataAccess.RemoveEnrollment(Enrollment);
dataAccess.AddCharge(Charge);
}
return(RedirectToPage("./Index"));
}