//ham them benh nhan moi vao CSDL
        public bool ThemBenhNhan(BenhNhan bn)
        {
            //them thong tin vao table BENHNHAN
            string sql = string.Format("Insert into BENHNHAN(STT, MaBenhNhan, MaDoiTuong, MaPhongKham, MaBacSi, Ho, Ten, GioiTinh, CMND, NgheNghiep, NgaySinh,"
            + "DiaChi, SDT, YeuCauKham, GioKham, NgayKham) values('{0}', '{1}', '{2}', '{3}', '{4}', N'{5}', N'{6}', N'{7}', '{8}', N'{9}', N'{10}', N'{11}', '{12}', N'{13}', '{14}', N'{15}')",
            "0", bn.MaBenhNhan,bn.MaDoiTuong, bn.MaPhongKham, bn.MaBacSi, bn.Ho, bn.Ten, bn.GioiTinh, bn.CMND, bn.NgheNghiep, bn.NgaySinh.ToString("MM/dd/yyyy"),
            bn.DiaChi, bn.SDT, bn.YeuCauKham, bn.GioKham.ToString("hh:mm:ss"), bn.NgayKham.ToString("MM/dd/yyyy"));

            if (connData.ExcuteQuery(sql))
                return true;
            return false;
        }
        //Sua doi thong tin benh nhan
        public bool SuaDoiBenhNhan(BenhNhan bn)
        {
            string sql = string.Format("Update BENHNHAN set Ho = N'{0}', Ten = N'{1}', NgaySinh = N'{2}', GioiTinh = N'{3}', DiaChi = N'{4}',"
            +" CMND = '{5}', MaDoiTuong = '{6}', NgheNghiep = N'{7}', SDT = '{8}', YeuCauKham = '{9}', NgayKham = N'{10}', MaPhongKham = '{11}'"
            + " where MaBenhNhan = '{12}'",bn.Ho, bn.Ten,
            bn.NgaySinh.ToString("MM/dd/yyyy"), bn.GioiTinh, bn.DiaChi, bn.CMND, bn.MaDoiTuong, bn.NgheNghiep, bn.SDT, bn.YeuCauKham,
            bn.NgayKham.ToString("MM/dd/yyyy"), bn.MaPhongKham, bn.MaBenhNhan);

            if (conn.ExcuteQuery(sql))
            {
                MessageBox.Show("Sửa đổi thông tin Bệnh nhân thành công!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return true;
            }
            else
                return false;
        }
 private BenhNhan LayThongTinBenhNhan()
 {
     BenhNhan bn = new BenhNhan();
     bn.MaBenhNhan = txtThemBN_MaBenhNhan.Text;
     bn.MaBenhAn = txtThemBN_MaBenhAnBN.Text;
     bn.MaDoiTuong = cboThemBN_MaDoiTuongBN.SelectedValue.ToString();
     bn.MaPhieuKham = txtThemBN_MaPhieuBN.Text;
     bn.MaPhongKham = cboThemBN_PhongKham.SelectedValue.ToString();
     bn.MaBacSi = txtThemBN_MaBacSi.Text;
     bn.Ho = txtThemBN_HoBN.Text;
     bn.Ten = txtThemBN_TenBN.Text;
     bn.GioiTinh = cboThemBN_GioiTinhBN.SelectedValue.ToString();
     bn.CMND = Convert.ToInt32(txtThemBN_CMNDBN.Text);
     bn.NgheNghiep = txtThemBN_NgheNghiepBN.Text;
     bn.NgaySinh = Convert.ToDateTime(dtPickerThemBN_NgaySinhBN.Value.ToString());
     bn.DiaChi = txtThemBN_DiaChiBN.Text;
     bn.SDT = Convert.ToInt64(txtThemBN_SDTBN.Text);
     bn.YeuCauKham = rtxtThemBN_YeuCauKhamBN.Text;
     bn.NgayKham = Convert.ToDateTime(dtPickerThemBN_NgayKhamBN.Value.ToString());
     bn.GioKham = Convert.ToDateTime(dtPicker_GioKhamBN.Value.ToString());
     return bn;
 }
        //ham them benh nhan moi vao CSDL
        public bool ThemBenhNhan(BenhNhan bn)
        {
            //them thong tin vao table BENHNHAN
            string sql = string.Format("Insert into BENHNHAN(STT, MaBenhNhan, MaDoiTuong, Ho, Ten, GioiTinh, CMND, NgheNghiep, NgaySinh,"
            + "DiaChi, SDT, YeuCauKham, MaBenhAn, NgayKham, MaPhongKham) values('{0}', '{1}', '{2}', N'{3}', N'{4}', N'{5}', '{6}', N'{7}', N'{8}', N'{9}', '{10}', N'{11}', '{12}', N'{13}', '{14}' )",
            "0", bn.MaBenhNhan, bn.MaDoiTuong, bn.Ho, bn.Ten, bn.GioiTinh, bn.CMND, bn.NgheNghiep, bn.NgaySinh.ToString("MM/dd/yyyy"), bn.DiaChi, bn.SDT, bn.YeuCauKham, bn.MaBenhAn,
            bn.NgayKham.ToString("MM/dd/yyyy"), bn.MaPhongKham);

            if (conn.ExcuteQuery(sql))
            {
                MessageBox.Show("Đã thêm bệnh nhân thành công!", "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return true;
            }
            else
                return false;
        }