public bool SaveStudent(StudentModel studentmodel)
        {
            bool result = false;

            try
            {
                using (var db = new SchoolManagementSystemDBEntities())
                {
                    var student = new Student()
                    {
                        SNAME      = studentmodel.SName,
                        SEMAIL     = studentmodel.SEmail,
                        SADDRESS   = studentmodel.SAddress,
                        SGDNAME    = studentmodel.SGDName,
                        SGDCONTACT = studentmodel.SGDContact,
                        SDOB       = studentmodel.SDob,
                        SGENDER    = studentmodel.SGender,
                        SPASSWORD  = studentmodel.SEmail,
                        Grade      = studentmodel.SGrade,
                        ClassName  = studentmodel.SClass
                    };
                    db.Students.Add(student);
                    db.SaveChanges();
                    result = true;
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return(result);
        }
        public bool SaveAppointment(AppointmentModel appointmentmodel)
        {
            bool result = false;

            try
            {
                using (var db = new SchoolManagementSystemDBEntities())
                {
                    var appointment = new SAppointment
                    {
                        teacherName = appointmentmodel.TeacherName,
                        reason      = appointmentmodel.Reason,
                        time        = appointmentmodel.ADate
                    };
                    db.SAppointments.Add(appointment);
                    db.SaveChanges();
                    result = true;
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return(result);
        }