Reads the value of a node in an XML file.

It is known that there is a local XML file (D: \ location. XML) as follows:

<? XML version = "1.0" encoding = "UTF-8"?> <Geocodersearchresponse> <status> 0 </status> <result> <location> <lat> 34.777046099314 </LAT> <LNG> 113.67314082709 </LNG> </location> <precise> 1 </precise> <confidence> 80 </confidence> <level> business building </level> </result> </geocodersearchresponse>

This is a coordinate information that shows the geographical location. This XML document requires that you obtain the value, Lat, and LNG under the <location> node, that is, the longitude and latitude.

I haven't practiced XML for a long time, and I am not familiar with XML. I have found some XML knowledge for hundreds of times. The following example shows how I can implement the obtained (including) step by step ):

First, instantiate XML to obtain the overall information of the XML file. This is required. The following code is the first time I wrote it. I didn't get it. I posted it for you to see why.

// Instantiate XML xmldocument xml = new xmldocument (); // read XML file. load (@ "D: \ location. XML "); // your xml address string lat =" "; string lng =" "; foreach (xmlnode node in XML. childnodes) {If (node. name = "geocodersearchresponse") {foreach (xmlnode node1 in node. childnodes) {If (node1.name = "result") {foreach (xmlnode node2 in node. childnodes) {If (node2.name = "location") {foreach (xmlnode node3 in node2.childnodes) {Switch (node3.name) {Case "Lat": lat = node2.innertext; break; case "LNG": lng = node2.innertext; break ;}}}}}}}}

This is my most stupid method. One by one, the node is obtained step by step, and the result is not as expected, so I did something thankless. So ah, work requires efficiency, skill, and no brute force. We do not recommend that you waste time thinking about this.

If there is a problem, you have to find out the problem and solve the problem. Now I have improved the previous acquisition method and the result is still not obtained. Now I am depressed and feel that there is nothing wrong with writing. How can I not get it? And give you a look

            XmlDocument xmldoc = new XmlDocument();            xmldoc.Load(@"D:\location.xml");            XmlNode xnRoot = xmldoc.SelectSingleNode("GeocoderSearchResponse");            XmlNodeList nodelist = xnRoot.ChildNodes;            foreach (XmlNode node in nodelist)            {                string lat = node.SelectSingleNode("lat").InnerXml;                if (lat != "")                {                    Console.WriteLine(lat);                }            }

Work is not a best bet. No, hurry and change your mind, change your thinking, and solve the problem. You cannot sink yourself into a problem and solidify your thinking, so when you get stuck, you need to relax now, either to get a cup of water to drink, or to breathe out, or simply to get WC. How can we get comfortable... This is often the case with inspiration...

Xmldocument xmldoc = new xmldocument (); xmldoc. load (@ "D: \ location. XML "); xmlnodelist xnroot = xmldoc. selectnodes ("/geocodersearchresponse/result/location"); // xmlnodelist nodelist = xnroot. childnodes; foreach (xmlnode node in xnroot) {string lat = node. selectsinglenode ("Lat "). innertext. tostring (); string lng = node. selectsinglenode ("LNG "). innertext. tostring (); If (LAT! = "" & Lng! = "") {// Here is the value you want console. writeline (LAT); console. writeline (LNG) ;}} console. Read ();

This code is the result I want. Everything is OK !!!

There are a lot of things that you forget, learning is to keep learning from forgetting and picking up.

For reference only !!!