HelloControllerXml.cs

This is an example of how to use Robot Web Services, XML and C#.

• Create a C# console application.
• Copy the program below
• Change the ip-address to your VC or RC
• Compile and run

The output will look like:

  system=RW6_1014 version=6.00.1014.00
  category=OS option=RobotWare OS and English
  category=Options option=613-1 Collision Detection
  ...
  Hit ENTER to exit ...

Program:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Net;
using System.IO;
using System.Xml;
using System.Xml.Linq;

namespace HelloControllerXml
{
    class Program
    {
        private CookieContainer _cookies = new CookieContainer(); // re-use http session between requests 
        private NetworkCredential _credentials = new NetworkCredential("Default User", "robotics");

        static void Main(string[] args)
        {
            Program ctrl = new Program();

            // for (int noRequest = 0; noRequest < 100; noRequest++) // test to do multiple requests
            {
                Stream xml = ctrl.GetSystemResource("http://192.168.8.105"); // get the system resource 
                ctrl.DisplayData(xml);  // display the system resource
                xml.Close();            // close used stream, requests will hang if not the stream is close            
            }
            
            Console.WriteLine("Hit ENTER to exit...");
            Console.ReadLine();
        }

        // <summary>
        // Ge the system resource
        // </summary>
        // <param name="host"></param>
        // <returns>XML stream</returns>
        Stream GetSystemResource(string host)
        {
            
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(host + "/rw/system"));
            request.Credentials = _credentials;
            request.Proxy = null; // don't use proxy, it's aussumed that the RC/VC is reachable without going via proxy 
            request.Method = "GET";
            request.CookieContainer = _cookies;

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            return response.GetResponseStream();
        }

        // <summary>
        // Deserialize system resource xml stream
        // </summary>
        // <param name="xmldata"></param>
        void DisplayData(Stream xmldata)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(xmldata);

            // Create an XmlNamespaceManager for resolving namespaces.
            XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
            nsmgr.AddNamespace("ns", "http://www.w3.org/1999/xhtml");

            // Use XPath to get nodes
            // get the 'sys-system-li' li item
            XmlNodeList sysNodes = doc.SelectNodes("//ns:li[@class='sys-system-li']", nsmgr); 
            foreach(XmlNode sysNode in sysNodes)
            {
                XmlNode systemNameNode = sysNode.SelectSingleNode("ns:span[@class='name']", nsmgr);
                XmlNode systemVersionNode = sysNode.SelectSingleNode("ns:span[@class='rwversion']", nsmgr);
                XmlNode systemVersionNameNode = sysNode.SelectSingleNode("ns:span[@class='rwversionname']", nsmgr);
                Console.WriteLine("system={0} version={1} versionname={2}", systemNameNode.InnerText.ToString(), systemVersionNode.InnerText.ToString(), systemVersionNameNode.InnerText.ToString());
            }

            // Get options from stream
            // get all 'sys-option-li' li items
            XmlNodeList optionNodes = doc.SelectNodes("//ns:li[@class='sys-option-li']", nsmgr); 
            foreach (XmlNode optNode in optionNodes)
            {
                XmlNode systemOptionNode = optNode.SelectSingleNode("ns:span[@class='option']", nsmgr);
                Console.WriteLine("option={0}", systemOptionNode.InnerText.ToString());
            }
        }
    }
}