Question

我想使用Linq从XML文档中提取数据并将其放入列表

<Data>
<FlightData DTS="20110216 17:17" flight="1234" origin="CYYZ" dest="CYUL" aircraft="945">
    <TLDRequest>
        <Airline>ABC</Airline>
        <AcReg>C-FABC</AcReg>
        <CalcType>T</CalcType>
        <OAT>-05</OAT>
        <Wind>060/10</Wind>
        <Flaps>5</Flaps>
        <Switches></Switches>
        <Runways>
            <Rwy>6L</Rwy>
            <Rwy>6R</Rwy>
        </Runways>
        ...
     </TLDRequest>
    ...
  </FlightData>
</Data>

我在C＃中的Linq代码工作 - 我可以从FlightData选项卡获取属性，但我认为它可能更有效，特别是在从TLDRequest标记获取数据的领域。我是否可以通过最佳实践来获取和获取子标签？

 public static List<ACARS_Phase> createAcarsPhaseObject(XDocument xDoc)
    {
        return (from ao in xDoc.Descendants("FlightData")
                select new ACARS_Phase
                {
                    FlightDate = DateTime.ParseExact(ao.Attribute("DTS").Value, "yyyyMMdd HH:mm", new CultureInfo("en-CA")),
                    FlightNumber = ao.Attribute("flight").Value,
                    Origin = ao.Attribute("origin").Value,
                    Destination = ao.Attribute("dest").Value,
                    InternalFinNumber = ao.Attribute("aircraft").Value,

                    OperatorCode = ao.Element("TLDRequest").Element("Airline").Value,
                    RegistrationNumber = ao.Element("TLDRequest").Element("AcReg").Value,
                    Wind = ao.Element("TLDRequest").Element("Wind").Value,
                    Flaps = ao.Element("TLDRequest").Element("Flaps").Value,
                    OAT = ao.Element("TLDRequest").Element("OAT").Value,
                }).ToList();
    }

祝你好运

Answer 1

一般来说，你的查询很好。如果你想减少一些冗余，可以考虑使用let一次获取TLDRequest元素，这样你就可以重复一点。

return (from ao in xDoc.Descendants("FlightData")
        let request = ao.Element("TLDRequest")
        select new AcARS_Phase 
        {
              // stuff
              OperatorCode = request.Element("Airline").Value,
              RegistrationNumber = request.Element("AcReg").Value,
              // etc.
        }).ToList();

改进Linq-XML到Object查询

1 个答案: