public HocSinh gethSinh(String maHS)
        {
            HocSinh hocSinh = (from hs in db.HocSinhs
                               where hs.MaHS == maHS
                               select hs).Single();

            return(hocSinh);
        }
        // hiển thị toàn bộ danh sách học sinh
        public PhieuKhamSucKhoe dspksk(HocSinh hocSinh, DateTime ngayKham)
        {
            PhieuKhamSucKhoe phieuKhamSucKhoe = (from p in db.PhieuKhamSucKhoes
                                                 where p.MaHS == hocSinh.MaHS && p.NgayKham == ngayKham
                                                 select p).Single();

            return(phieuKhamSucKhoe);
        }
        // hien bamg danh gia cua hoc sinh
        public DanhGiaHocSinhTuan bangDG(HocSinh hocSinh)
        {
            DanhGiaHocSinhTuan danhGiaHocSinhTuan = (from b in db.DanhGiaHocSinhTuans
                                                     where b.MaHS == hocSinh.MaHS
                                                     select b).Single();

            return(danhGiaHocSinhTuan);
        }
        // hien bamg danh gia cua hoc sinh
        public DanhGiaHocSinhNam bangDG(HocSinh hocSinh)
        {
            DanhGiaHocSinhNam danhGiaHocSinhNam = (from b in db.DanhGiaHocSinhNams
                                                   where b.HocSinh == hocSinh
                                                   select b).Single();

            return(danhGiaHocSinhNam);
        }
        public void updatehSinh(HocSinh hocSinh)
        {
            HocSinh hSinh = (from hs in db.HocSinhs
                             where hs.MaHS == hocSinh.MaHS
                             select hs).Single();

            if (hSinh != null)
            {
                hSinh.MaLop    = hocSinh.MaLop;
                hSinh.NgaySinh = hocSinh.NgaySinh;
                hSinh.HoTen    = hocSinh.HoTen;
                hSinh.GioiTinh = hocSinh.GioiTinh;
                hSinh.HoTenNT1 = hocSinh.HoTenNT1;
                hSinh.EmailNT1 = hocSinh.EmailNT1;
                hSinh.DTNT1    = hocSinh.DTNT1;
                hSinh.HoTenNT2 = hocSinh.HoTenNT2;
                hSinh.EmailNT2 = hocSinh.EmailNT2;
                hSinh.DTNT2    = hocSinh.DTNT2;
                hSinh.ĐiaChi   = hocSinh.ĐiaChi;
                hSinh.Hinh     = hocSinh.Hinh;

                db.SaveChanges();
            }
        }
 public void deletehSinh(HocSinh hocSinh)
 {
     db.HocSinhs.Remove(hocSinh);
     db.SaveChanges();
 }
 public void inserthSinh(HocSinh hocSinh)
 {
     db.HocSinhs.Add(hocSinh);
     db.SaveChanges();
 }