public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
var student = await _context.Students
.AsNoTracking()
.FirstOrDefaultAsync(m => m.ID == id);
if (student == null)
{
return(NotFound());
}
try
{
_context.Students.Remove(student);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
catch (DbUpdateException /* ex */)
{
//Log the error (uncomment ex variable name and write a log.)
return(RedirectToAction("./Delete",
new { id = id, saveChangesError = true }));
}
}
public async Task <IActionResult> OnPostAsync(int?id)
{
Instructor instructor = await _context.Instructors
.Include(i => i.CourseAssignments)
.SingleAsync(i => i.ID == id);
var departments = await _context.Departments
.Where(d => d.InstructorID == id)
.ToListAsync();
departments.ForEach(d => d.InstructorID = null);
_context.Instructors.Remove(instructor);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
var emptyStudent = new Student();
if (await TryUpdateModelAsync <Student>(
emptyStudent,
"student",
s => s.FirstMidName, s => s.LastName, s => s.EnrollmentDate))
{
_context.Students.Add(emptyStudent);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
return(null);
}
public async Task <IActionResult> OnPostAsync(int?id)
{
if (!ModelState.IsValid)
{
return(Page());
}
var studentToUpdate = await _context.Students.FindAsync(id);
if (await TryUpdateModelAsync <Student>(
studentToUpdate,
"student",
s => s.FirstMidName, s => s.LastName, s => s.EnrollmentDate))
{
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
return(Page());
}