BKI_DichVuMatDat.HeThong.f308_DOI_MAT_KHAU_NGUOI_SD.save_data C# (CSharp) Method

        private void save_data()
        {
            //Buoc 1: Check validate du lieu khong duoc de trong
            if(!check_validate_data_is_ok())
                return;

            //Buoc 2: Check mat khau cu co dung voi ten tai khoan khong?
            //Khong dung thi hien thong bao
            US_HT_NGUOI_SU_DUNG v_us_ht_nguoi_su_dung = new US_HT_NGUOI_SU_DUNG(CIPConvert.ToDecimal(m_cbo_tai_khoan.SelectedValue));

            if(CIPConvert.Deciphering(v_us_ht_nguoi_su_dung.strMAT_KHAU) != m_txt_mat_khau_cu.Text) {
                CHRM_BaseMessages.MsgBox_Error(CONST_ID_MSGBOX.ERROR_NHAP_SAI_MAT_KHAU_CU);
                return;
            }
            //Buoc 3: Check mat khau cu va moi co trung nhau hay khong?
            if(m_txt_mat_khau_moi.Text != m_txt_nhap_lai_mat_khau_moi.Text) {
                CHRM_BaseMessages.MsgBox_Error(CONST_ID_MSGBOX.ERROR_NHAP_LAI_MAT_KHAU_MOI_BI_SAI);
                return;
            }

            //Buoc 4: Luu
            try
            {
                v_us_ht_nguoi_su_dung.strMAT_KHAU = CIPConvert.Encoding(m_txt_mat_khau_moi.Text);

                v_us_ht_nguoi_su_dung.Update();
            }
            catch (System.Exception v_e)
            {
                CSystemLog_301.ExceptionHandle(v_e);
            }
            //Buoc 5: Hien thong bao
            CHRM_BaseMessages.MsgBox_Infor(CONST_ID_MSGBOX.INFOR_DOI_MAT_KHAU_THANH_CONG);
            this.Close();
        }