在sqlServer中查询有结果，但是在C#中查询却显示“There is no row at position 1”，请问为什么会出现这个原因，怎么修改

Question

            OpenSql();

            SqlCommand com = new(sql, con);

            com.Parameters.AddWithValue("FromTime", model.Time);
            com.Parameters.AddWithValue("FromCity", model.FromCityCode);
            com.Parameters.AddWithValue("ToCity", model.ToCityCode);

            SqlDataAdapter daReader = new SqlDataAdapter();
            daReader.SelectCommand = com;

            DataSet dataSet = new();
            daReader.Fill(dataSet, "OneFlight");

            List<Model.StopFlight> list = new();

            Model.StopFlight[] stopModel = new Model.StopFlight[2];
            for(int i=0;i<stopModel.Length;i++)
            {
                stopModel[i] = new();

                stopModel[i].Time = (TimeSpan)dataSet.Tables["OneFlight"].Rows[i]["Time"];
                stopModel[i].EconomyPrice = Convert.ToDecimal(dataSet.Tables["OneFlight"].Rows[i]["EconomyPrice"]);
                stopModel[i].FlightNumber = Convert.ToInt32(dataSet.Tables["OneFlight"].Rows[i]["FlightNumber"]);
                stopModel[i].FlightTime = Convert.ToInt32(dataSet.Tables["OneFlight"].Rows[i]["FlightTime"]);
                stopModel[i].DepartureAirportIATA = (string)dataSet.Tables["OneFlight"].Rows[i]["DepartureAirportIATA"];
                stopModel[i].ArrivalAirportIATA = (string)dataSet.Tables["OneFlight"].Rows[i]["ArrivalAirportIATA"];

                list.Add(stopModel[i]);
            }

            return list;

            string sql = $"SELECT [Schedule].[Time],[Schedule].[EconomyPrice],[Schedule].[FlightNumber]," +
                $"[Route].[FlightTime],[Route].[DepartureAirportIATA],[Route].[ArrivalAirportIATA] " +
                $"FROM [dbo].[Schedule] LEFT JOIN [dbo].[Route] " +
                $"ON [Schedule].[RouteId]=[Route].[RouteId] " +
                $"WHERE [Schedule].[Date]=@FromTime AND [Schedule].[RouteId] " +
                $"IN (SELECT [Route].[RouteId] FROM [Route] " +
                $"WHERE [Route].[DepartureAirportIATA]=@FromCity " +
                $"AND [Route].[ArrivalAirportIATA] " +
                $"IN (SELECT [Route].[DepartureAirportIATA] " +
                $"FROM [Route] WHERE [Route].[ArrivalAirportIATA]=@ToCity " +
                $"AND [Route].[DepartureAirportIATA] " +
                $"IN (SELECT [Route].[ArrivalAirportIATA] " +
                $"FROM [Route] WHERE [Route].[DepartureAirportIATA]=@FromCity)))" +
                $"UNION\n" +
                $"SELECT [Schedule].[Time],[Schedule].[EconomyPrice],[Schedule].[FlightNumber]," +
                $"[Route].[FLightTime],[Route].[DepartureAirportIATA]," +
                $"[Route].[ArrivalAirportIATA] FROM [Schedule] LEFT JOIN [Route] " +
                $"ON [Schedule].[RouteId]=[Route].[RouteId] " +
                $"WHERE [Schedule].[Date]=@FromTime AND [Schedule].[RouteId] " +
                $"IN (SELECT [Route].[RouteId] FROM [Route] " +
                $"WHERE [Route].[ArrivalAirportIATA]=@FromCity AND [Route].[DepartureAirportIATA] " +
                $"IN (SELECT [Route].[ArrivalAirportIATA] FROM [Route] WHERE [Route].[DepartureAirportIATA]=@ToCity))";

Answer 1

没有查询到数据才会报这个，检查一下条件吧，不行把where条件去掉试看，如果可以跑，说明代码没问题