c# - 在 C# 中解析天气预报数据(来自 NDFD)

Question

我正在使用 > http://www.weather.gov/forecasts/xml/DWMLgen/wsdl/ndfdXML.wsdl web 服务通过调用 GmlTimeSeries web 方法获取天气详情。现在我只想从 xml 中读取温度、天气图标链接详细信息。 xml 包含大量数据。谁能给出从 xml 中获取所需数据的想法？

NDFD HOme Page

XML 如下所示:Full XML File is Here

我想从下面的 xml 数据中获取温度:

 <gml:featureMember>
          <app:Forecast_Gml2Point>
             <gml:position>
                <gml:Point srsName="EPSG:4326">
                   <gml:coordinates>-87.8859170,41.7450495</gml:coordinates>
                </gml:Point>
             </gml:position>
             <app:validTime>2011-06-07T12:00:00</app:validTime>
             <app:temperature>77.0</app:temperature>
          </app:Forecast_Gml2Point>
       </gml:featureMember>

       <gml:featureMember>
          <app:Forecast_Gml2Point>
             <gml:position>
                <gml:Point srsName="EPSG:4326">
                   <gml:coordinates>-87.8859170,41.7450495</gml:coordinates>
                </gml:Point>
             </gml:position>
             <app:validTime>2011-06-07T15:00:00</app:validTime>
             <app:temperature>90.0</app:temperature>
          </app:Forecast_Gml2Point>
       </gml:featureMember>

还有下面的天气短语:

 <gml:featureMember>
      <app:Forecast_Gml2Point>
         <gml:position>
            <gml:Point srsName="EPSG:4326">
               <gml:coordinates>-87.8859170,41.7450495</gml:coordinates>
            </gml:Point>
         </gml:position>
         <app:validTime>2011-06-08T03:00:00</app:validTime>
         <app:weatherPhrase>Mostly Clear</app:weatherPhrase>
      </app:Forecast_Gml2Point>
   </gml:featureMember>

   <gml:featureMember>
      <app:Forecast_Gml2Point>
         <gml:position>
            <gml:Point srsName="EPSG:4326">
               <gml:coordinates>-87.8859170,41.7450495</gml:coordinates>
            </gml:Point>
         </gml:position>
         <app:validTime>2011-06-08T06:00:00</app:validTime>
         <app:weatherPhrase>Mostly Clear</app:weatherPhrase>
      </app:Forecast_Gml2Point>
   </gml:featureMember>

上面是一段xml文件。像这样，我有 7 天天气详细信息的大量数据。我需要从上面的 xml 中读取温度和天气状况。

Full XML File is Here

Answer 1

我想你会找到你的答案here

编辑:你需要使用命名空间，例如:

XNamespace app = "http://www.weather.gov/forecasts/xml/OGC_services";
var result = from i in doc.Descendants(app+"Forecast_Gml2Point")
                  select new 
                  {
                      temperature = i.Element(app + "temperature"), 
                      icon = i.Element(app+"weatherIcon")
                  };

编辑 2:如果您需要使用其他命名空间获取 Element，这是另一个示例:

XNamespace gml ="http://www.opengis.net/gml"
i.Element(gml+"coordinates" )