使用C#中的xmlnamespacemanager添加命名空间

本文关键字：添加 命名空间 xmlnamespacemanager 中的 使用 | 更新日期: 2023-09-27 17:58:50

我正在尝试从XML文件中读取数据。在此元素中，前缀为"app"answers"gml"文本。由于这些前缀，我无法读取数据。为此，我尝试使用XMLNamespaceManager添加名称空间，但没有获得。

编辑：

        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(new StringReader(strResult));
        NameTable nt = new NameTable();
        XmlNamespaceManager prefix = new XmlNamespaceManager(nt);
        string nmspc = xmlDoc.DocumentElement.NamespaceURI;
        prefix.AddNamespace("app:",xmlDoc.DocumentElement.NamespaceURI);
        prefix.PushScope();

这里的strResult包含XML数据

使用C#中的xmlnamespacemanager添加命名空间

类似于：

var doc = new XmlDocument();
doc.Load(source);
var nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("app", "http://www.weather.gov/forecasts/xml/OGC_services");
var firstPoint = doc.SelectSingleNode("//app:Forecast_Gml2Point", nsmgr);

请注意，命名空间别名只是方便，不必在文档和命名空间管理器之间匹配，但如果匹配，可能会更容易。

您可以使用LINQ到XML，如下所示：

var document = XDocument.Load("http://www.weather.gov/forecasts/xml/SOAP_server/ndfdXMLclient.php?whichClient=GmlLatLonList&lat=&lon=&listLatLon=&lat1=&lon1=&lat2=&lon2=&resolutionSub=&listLat1=&listLon1=&listLat2=&listLon2=&resolutionList=&endPoint1Lat=&endPoint1Lon=&endPoint2Lat=&endPoint2Lon=&listEndPoint1Lat=&listEndPoint1Lon=&listEndPoint2Lat=&listEndPoint2Lon=&zipCodeList=&listZipCodeList=&centerPointLat=&centerPointLon=&distanceLat=&distanceLon=&resolutionSquare=&listCenterPointLat=&listCenterPointLon=&listDistanceLat=&listDistanceLon=&listResolutionSquare=&citiesLevel=&listCitiesLevel=&sector=&gmlListLatLon=38.99,-77.02%2039.70,-104.80%2047.6,-122.30&featureType=Forecast_Gml2Point&requestedTime=&startTime=2000-01-01T00:00:00&endTime=2012-01-01T00:00:00&compType=Between&propertyName=wx,temp,icons&product=time-series&begin=2004-01-01T00:00:00&end=2015-06-07T00:00:00&maxt=maxt&Submit=Submit");
var appSampleElements = document.Descendants(XName.Get("Forecast_Gml2Point", "http://www.weather.gov/forecasts/xml/OGC_services")).ToList();
var gmlSampleElements = document.Descendants(XName.Get("Box", "http://www.opengis.net/gml")).ToList();

使用"http://www.weather.gov/forecasts/xml/OGC_services"前缀为app的命名空间。使用"http://www.opengis.net/gml"前缀为gml.的命名空间

使用XmlDocument:

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("http://www.weather.gov/forecasts/xml/SOAP_server/ndfdXMLclient.php?whichClient=GmlLatLonList&lat=&lon=&listLatLon=&lat1=&lon1=&lat2=&lon2=&resolutionSub=&listLat1=&listLon1=&listLat2=&listLon2=&resolutionList=&endPoint1Lat=&endPoint1Lon=&endPoint2Lat=&endPoint2Lon=&listEndPoint1Lat=&listEndPoint1Lon=&listEndPoint2Lat=&listEndPoint2Lon=&zipCodeList=&listZipCodeList=&centerPointLat=&centerPointLon=&distanceLat=&distanceLon=&resolutionSquare=&listCenterPointLat=&listCenterPointLon=&listDistanceLat=&listDistanceLon=&listResolutionSquare=&citiesLevel=&listCitiesLevel=&sector=&gmlListLatLon=38.99,-77.02%2039.70,-104.80%2047.6,-122.30&featureType=Forecast_Gml2Point&requestedTime=&startTime=2000-01-01T00:00:00&endTime=2012-01-01T00:00:00&compType=Between&propertyName=wx,temp,icons&product=time-series&begin=2004-01-01T00:00:00&end=2015-06-07T00:00:00&maxt=maxt&Submit=Submit");
XmlNamespaceManager namespaceManager = new XmlNamespaceManager(xmlDoc.NameTable);
namespaceManager.AddNamespace("app", "http://www.weather.gov/forecasts/xml/OGC_services");
namespaceManager.AddNamespace("gml", "http://www.opengis.net/gml");
var appNodes = xmlDoc.SelectNodes("//app:Forecast_Gml2Point", namespaceManager);
var gmlNode = xmlDoc.SelectSingleNode("//gml:Box", namespaceManager);
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