Question

I’m learning to use ReST Web services and I need to find out how to get a specific value from the xml string that is returned. How can I simply get 1 value from an xml String? All I want is one value. Is there some way to convert this string into something with an indexer?

I’m using Yahoo Geocoding service. Results:

<ResultSet version="1.0">
<Error>0</Error>
<ErrorMessage>No error</ErrorMessage>
<Locale>us_US</Locale>
<Quality>87</Quality>
<Found>1</Found>
−
<Result>
<quality>85</quality>
<latitude>86.457310</latitude>
<longitude>-73.262245</longitude>
<offsetlat>46.457311</offsetlat>
<offsetlon>-73.262071</offsetlon>
<radius>500</radius>
<name/>
<line1>1234 N Main St</line1>
<line2>Anytown, New York  12345</line2>
<line3/>
<line4>United States</line4>
<house>1234</house>
<street>N Main St</street>
<xstreet/>
<unittype/>
<unit/>
<postal>12345</postal>
<neighborhood/>
<city>New York</city>
<county>Albany County</county>
<state>New York</state>
<country>United States</country>
<countrycode>US</countrycode>
<statecode>NY</statecode>
<countycode/>
<uzip>12345</uzip>
<hash>E692D20CBDF86A2E</hash>
<woeid>12783988</woeid>
<woetype>11</woetype>
</Result>
</ResultSet>

Answer 1

Use XPath to address the node you are interested in:

http://msdn.microsoft.com/en-us/library/d271ytdx(v=VS.90).aspx

To transform XML string into an XML document

XmlDocument doc = new XmlDocument();
doc.LoadXml(yourString);

Here is a good introduction to XPath: http://www.codeproject.com/KB/cpp/myXPath.aspx