1. 增加一个WebApi Controller, VS 会自动添加相关的引用，主要有System.Web.Http，System.Web.Http.WebHost，System.Net.Http

2. 在App_Start 下创建 WebApiConfig.cs 并注册路由

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Web.Http;

namespace Libaray.Web.App_Start

{

public static class WebApiConfig

{

public static void Register(HttpConfiguration config)

{

// Web API 配置和服务

// Web API 路由

config.MapHttpAttributeRoutes();

config.Routes.MapHttpRoute(

name: "DefaultApi",

routeTemplate: "api/{controller}/{id}",

defaults: new { id = RouteParameter.Optional }

);

}

}

}

3. 在Global.asax， Application_Start 下添加 WebAPI 配置

using Libaray.Web.App_Start;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Http;

using System.Web.Mvc;

using System.Web.Optimization;

using System.Web.Routing;

namespace Libaray.Web

{

public class MvcApplication : System.Web.HttpApplication

{

protected void Application_Start()

{

AreaRegistration.RegisterAllAreas();

GlobalConfiguration.Configure(WebApiConfig.Register);

FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

RouteConfig.RegisterRoutes(RouteTable.Routes);

BundleConfig.RegisterBundles(BundleTable.Bundles);

}

}

}

4. 在第一步添加的WebApi 中填写相应代码， 

using Libaray.Web.Models;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Net.Http;

using System.Web.Http;

namespace Libaray.Web.Controllers

{

[RoutePrefix("api/SystemUsers")]

public class SystemUsersController : ApiController

{

[HttpGet, Route("GetUserList")]

public List GetUserModels()

{

UserModelService UserBS = new UserModelService();

return UserBS.FindList(u => u.isActive == true);

}

[HttpGet, Route("GetUser")]

public UserModel GetUserModel(int id = 0)

{

if(id != 0)

{

UserModelService UserBS = new UserModelService();

return UserBS.Find(u => u.Id == id);

}

else

{

return null;

}

}

[HttpPost, Route("Login")]

public bool Login(string loginId,string password)

{

UserModelService UserBS = new UserModelService();

return UserBS.ValidateLoginInfo(loginId, password);

}

}

}

5. Run the application and call the API. Example: http://localhost:49919/api/SystemUsers/GetUserList

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