Using Linq to XML for XPath Style Document Searching
Question
Let's say I've got a web service response which looks like this:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<PMWSGetReportResponse xmlns="http://localhost/PCMilerWS/">
<PMWSGetReportResult>
<ReportResponse>
<Version>25.02</Version>
<Report>
<RptType>m</RptType>
<TripID>011535</TripID>
<StopNum>1</StopNum>
<MilesReport>
<StpLineType>
<SRStop>
<Region>NA</Region>
<Address1 />
<City>Mill Valley</City>
<State>CA</State>
<Zip>94941</Zip>
<Juris>Marin</Juris>
<Lat>37894200</Lat>
<Long>-122493488</Long>
</SRStop>
<LMiles>0.0</LMiles>
<TMiles>0.0</TMiles>
<LCostMile>0.00</LCostMile>
<TCostMile>0.00</TCostMile>
<LHours>0:00</LHours>
<THours>0:00</THours>
<LTolls>0.00</LTolls>
<TTolls>0.00</TTolls>
<LEstghg>0.0</LEstghg>
<TEstghg>0.0</TEstghg>
</StpLineType>
<StpLineType>
<SRStop>
<Region>NA</Region>
<Address1 />
<City>San Francisco</City>
<State>CA</State>
<Zip>94109</Zip>
<Juris>San Francisco</Juris>
<Lat>37790599</Lat>
<Long>-122418809</Long>
<StopWarning>False</StopWarning>
</SRStop>
<LMiles>13.2</LMiles>
<TMiles>13.2</TMiles>
<LCostMile>34.33</LCostMile>
<TCostMile>34.33</TCostMile>
<LHours>0:17</LHours>
<THours>0:17</THours>
<LTolls>12.50</LTolls>
<TTolls>12.50</TTolls>
<LEstghg>48.7</LEstghg>
<TEstghg>48.7</TEstghg>
</StpLineType>
</MilesReport>
</Report>
</ReportResponse>
</PMWSGetReportResult>
</PMWSGetReportResponse>
</soap:Body>
</soap:Envelope>
I've been trying to use Linq to XML to retrieve, say, the list of all StpLineType nodes. I've tried doing so with something like:
XDocument xdoc = XDocument.Load(new StringReader(soapResponse));
var results = xdoc.Descendants("StpLineType");
But nothing is returned. I can see that the document is loaded into xdoc, but I can't seem to correctly query it. FWIW, I've also tried:
XDocument xdoc = XDocument.Load(new StringReader(soapResponse));
XNamespace ns = "soap";
var results = xdoc.Descendants(ns + "StpLineType");
Just in case the namespace was causing the problem - no luck.
What am I missing?
3 answers
solution1
0 2011-10-01 20:30:49
Try
XDocument xdoc = XDocument.Load(new StringReader(soapResponse));
XNamespace ns = "http://localhost/PCMilerWS/";
var results = xdoc.Descendants(ns + "StpLineType");
solution2
0 2011-10-01 20:35:15
You should register the "soap" namespace using the XmlNamespaceManager .
Check out this post:
solution3
0 ACCPTED 2011-10-01 20:35:17
You're ignoring the two XML namespaces on this document!
- The root level and the
<body>tag are in thesoapnamespace - the rest of the document is in the "default" namespace (without prefix) defined on the
<PMWSGetReportResponse>element
If you take that into account - things begin to work just fine!
XDocument xdoc = XDocument.Load(new StringReader(soapResponse));
XNamespace soap = "http://schemas.xmlsoap.org/soap/envelope/";
XNamespace ns = "http://localhost/PCMilerWS/";
var results = xdoc.Root.Element(soap + "Body").Descendants(ns + "StpLineType");
But the main question really is: why on earth are you manually parsing a SOAP response?? .....
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