HelloControllerJson.cs

This is an example of how to use Robot Web Services, JSON and C# (.net 4.5). The idea of this example comes from http://blogs.msdn.com/b/henrikn/archive/2012/02/16/httpclient-is-here.aspx.

• Create a C# console application.
• Install following packages using Nuget package manager
• PM> Install-Package Microsoft.AspNet.WebApi.Client -Version 5.1.2
• PM> Install-Package System.Json -Version 4.0.20126.16343
• Copy the program below
• Change the ip-address to your VC or RC
• Compile and run

The output will look like:

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

Program:

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

using System.Net;
using System.Net.Http;
using System.Json;

namespace HelloControllerJson
{
    class Program
    {
        static string _address = "http://192.168.8.105/rw/system?json=1";  // resource to get

        static void Main(string[] args)
        {
            Task t = new Task(GetRWService);
            t.Start();

            Console.WriteLine("Hit ENTER to exit...");
            Console.ReadLine();
        }

        // <summary>
        // Get the robotware system name, version and version name
        // </summary>
        static async void GetRWService()
        {
            var handler = new HttpClientHandler { Credentials = new NetworkCredential("Default User", "robotics") };
            handler.Proxy = null;   // disable the proxy, the controller is connected on same subnet as the PC 
            handler.UseProxy = false;

            // Send a request continue when complete
            using (HttpClient client = new HttpClient(handler))
            using (HttpResponseMessage response  = await client.GetAsync(_address))
            using (HttpContent content = response.Content)
            {
                // Check that response was successful or throw exception
                response.EnsureSuccessStatusCode();

                // Get HTTP response from completed task.
                string result = await content.ReadAsStringAsync();

                // Deserialize the returned json string
                dynamic obj = Newtonsoft.Json.JsonConvert.DeserializeObject(result);

                // Display controller name, version and version name
                var service = obj._embedded._state[0]; // the first item in the json state response is the system name, robotware version and robotware version name
                Console.WriteLine("   service={0} name={1} version={2} versionname={3}", service._title, service.name, service.rwversion, service.rwversionname);

                // Display all installed options
                foreach (var option in obj._embedded._state[1].options) // the second state item is an array of installed options
                {
                    Console.WriteLine("   option={0}", option.option);
                }
            }
        }
    }
}