用 C# 實現一個簡單的 Restful Service 供外部調用，大體總結為4點：

• The service contract (the methods it offers).
• How do you know which one to access from the URL given (URL Routing).
• The implementation of the service.
• How you will host the service.

詳細的基本步驟如下所示：

1）：工程結構（Class Library Project）

2）： IRestDemoService.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Web;

namespace EricSunRestService
{
    [ServiceContract(Name = "RestDemoServices")]
    public interface IRestDemoServices
    {
        [OperationContract]
        [WebGet(UriTemplate = Routing.GetClientRoute, BodyStyle = WebMessageBodyStyle.Bare)]
        string GetClientNameById(string Id);
    }


    public static class Routing
    {
        public const string GetClientRoute = "/Client/{id}";
    }
}

3）：RestDemoService.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Activation;

namespace EricSunRestService
{
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Single, IncludeExceptionDetailInFaults = true)]
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class RestDemoServices : IRestDemoServices
    {
        public string GetClientNameById(string Id)
        {
            string ReturnString = "HaHa id is: " + Id;

            return ReturnString;
        }
    }
}

4）：Host Service 工程結構 （Console Application）

5）：Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EricSunRestService;
using System.ServiceModel.Web;

namespace EricSunHostService
{
    class Program
    {
        static void Main(string[] args)
        {
            RestDemoServices demoServices = new RestDemoServices();
            WebServiceHost _serviceHost = new WebServiceHost(demoServices, new Uri("http://localhost:8000/DemoService"));
            _serviceHost.Open();
            Console.ReadKey();
            _serviceHost.Close();
        }
    }
}

6）：運行Host程序，在瀏覽器中輸入對應Service的Url

更多信息請看如下鏈接：

http://www.progware.org/Blog/post/A-simple-REST-service-in-C.aspx

用 C# 實現一個簡單的 Rest Service 供外部調用