public async Task <BizonylatComplexResult> GetComplex([FromQuery] string sid,
                                                              [FromBody] int bizonylatKod)
        {
            var result = new BizonylatComplexResult();

            using (var tr = await _context.Database.BeginTransactionAsync())
                try
                {
                    result.Result = new List <BizonylatComplexDto> {
                        await BizonylatBll.GetComplexAsync(_context, sid, bizonylatKod)
                    };

                    tr.Commit();
                }
                catch (Exception ex)
                {
                    tr.Rollback();
                    result.Error = ex.InmostMessage();
                }

            return(result);
        }