public async Task <int> UpdateAsync(Student student)
{
_context.Attach(student).State = EntityState.Modified;
int changes = await _context.SaveChangesAsync();
return(await Task.FromResult(changes));
}
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
_context.Attach(Course).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!CourseExists(Course.CourseID))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToPage("./Index"));
}
public IActionResult OnPostEdit()
{
if (!ModelState.IsValid)
{
return(View());
}
_context.Attach(Student).State = EntityState.Modified;
try
{
_context.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
if (!StudentExists(Student.ID))
{
return(NotFound());
}
else
{
throw;
}
}
return(View("List", _context.Student.ToList()));
}
public ActionResult DeleteStudent(long studentId)
{
var student = new Student
{
StudentId = studentId
};
_dbContext.Attach(student);
_dbContext.Remove(student);
_dbContext.SaveChanges();
return(Ok());
}
public ActionResult DeleteInstructor(long instructorId)
{
var instructor = new Instructor
{
InstructorId = instructorId
};
_dbContext.Attach(instructor);
_dbContext.Remove(instructor);
_dbContext.SaveChanges();
return(Ok());
}
public void UpdateKabinets(SchoolContext context,
int selectedKabinet, SchoolClass schoolClass)
{
var schoolClassKabinet = schoolClass.SchoolClassKabinetAssignment.KabinetId;
context.Attach(schoolClass).State = EntityState.Modified;
context.Remove(schoolClass.SchoolClassKabinetAssignment);
schoolClass.SchoolClassKabinetAssignment =
new SchoolClassKabinetAssignment()
{
KabinetId = schoolClass.Id,
SchoolClassId = selectedKabinet
};
}
public void Update(T entity)
{
var avoidingAttachedEntity = GetById(entity.Id);
_context.Entry(avoidingAttachedEntity).State = EntityState.Detached;
var entry = _context.Entry(entity);
if (entry.State == EntityState.Detached)
{
_context.Attach(entity);
}
_context.Entry(entity).State = EntityState.Modified;
_context.SaveChanges();
}