Retrieve values from xml - c#

Question

I have the following xml file from an API,

<IPInformation xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://ws.cdyne.com/">
<City>xxxxxx</City>
<StateProvince>12</StateProvince>
<Country>xxxxxx</Country>
<Organization/>
<Latitude>13.0833</Latitude>
<Longitude>80.28329</Longitude>
<AreaCode>0</AreaCode>
<TimeZone/>
<HasDaylightSavings>false</HasDaylightSavings>
<Certainty>90</Certainty>
<RegionName/>
<CountryCode>xx</CountryCode>
</IPInformation>

I need to get the Latitude and Longitude values from above xml and store it in a string.

I am working on c# .net 3.5 framework, I tried the below code,

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(response.GetResponseStream());
location = xmlDoc.DocumentElement.SelectSingleNode("//City");
latitude = xmlDoc.DocumentElement.SelectSingleNode("//Latitude");

I am always getting Null instead of 13.0833 and 80.28329 .

Can any one tell me how to retrieve the Latitude and Longitude values from above xml.

Thanks

Answer 1

Your problem is the namespace. I copied your XML into a.xml and following works (LINQpad):

void Main()
{
    var a = @"c:\temp\a\a.xml";
    XmlDocument x = new XmlDocument();
    x.Load(a);

    var ns = new XmlNamespaceManager(x.NameTable);
    ns.AddNamespace("x", x.DocumentElement.NamespaceURI);
    x.DocumentElement.SelectSingleNode("//x:Longitude", ns).Dump();

}

prints

<Longitude xmlns="http://ws.cdyne.com/">80.28329</Longitude>

Answer 2

首先，您在xml中有两个xmlns属性声明-如果删除xmlns="http://ws.cdyne.com/"并将查询更改为/IPInformation/Latitude ，则可以返回有效的XMLNode。