前言：
一个简单的Web API实例，通过自己编写Web API的代码来可以更好的感悟Web API的运行机制，废话不多说，直接上代码，希望同为初学者的同学能够跟着敲一遍，所有代码通过调试，可自行在原有基础上进行修改和扩展，有任何疑问还请不吝赐教。
正文：
1、首先创建一个空的Web项目，注意是Empty，而非Web API
注意：
这里一定要引入如下DLL：
Json.NET
System.NET.Http
System.Web.Http
System.Web.Http.WebHost
1.1. 大体的目录是这样的，没有明确规定，读者可自行拟定目录
2、首先创建一个WebApiConfig的配置文件，这里名称可自行拟定，主要用来定义Web API的路由
详细代码如下：
1 namespace Ryan4_WebAPI_Application_01 2 3 { 4 5 public class WebApiConcifg 6 7 { 8 9 public static void Register(HttpConfiguration config) 10 11 { 12 13 config.Routes.MapHttpRoute( 14 15 name: "DefaultApi", 16 17 routeTemplate: "api/{controller}/{action}/{id}", 18 19 defaults: new { id = RouteParameter.Optional } 20 21 ); 22 23 } 24 25 } 26 27 }
接下来必须要创建一个asax文件，来注册这个定义的API Route
在Application_Start中加入如下代码，有了这句后方能在程序运行后使用Web API方式定位你的控制器和方法
1 protected void Application_Start(object sender, EventArgs e) 2 { 3 Web_API_Config.Register(GlobalConfiguration.Configuration); 4 } 5 6 protected void Session_Start(object sender, EventArgs e) 7 { 8 9 } 10 11 protected void Application_BeginRequest(object sender, EventArgs e) 12 { 13 14 } 15 16 protected void Application_AuthenticateRequest(object sender, EventArgs e) 17 { 18 19 } 20 21 protected void Application_Error(object sender, EventArgs e) 22 { 23 24 } 25 26 protected void Session_End(object sender, EventArgs e) 27 { 28 29 } 30 31 protected void Application_End(object sender, EventArgs e) 32 { 33 34 } 35 }
3、创建数据实体Users.cs
详细代码如下：
1 namespace Ryan4_WebAPI_Application_01.Model.Entities 2 3 { 4 5 public class Users 6 7 { 8 9 public int Id { get; set; } 10 11 public string UName { get; set; } 12 13 public string UPass { get; set; } 14 15 public int UAge { get; set; } 16 17 public string UAddress { get; set; } 18 19 } 20 21 }
4、创建控制器：UserController.cs
1 namespace Ryan4_WebAPI_Application_01.Controller 2 3 { 4 5 public class UserController : ApiController 6 7 { 8 9 public List<Users> GetUser() 10 11 { 12 13 var userList = new List<Users> 14 15 { 16 17 new Users { Id = 1, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 18 19 new Users { Id = 2, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 20 21 new Users { Id = 3, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 22 23 new Users { Id = 4, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 24 25 new Users { Id = 5, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 26 27 new Users { Id = 6, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 28 29 new Users { Id = 7, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 30 31 new Users { Id = 8, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 32 33 new Users { Id = 9, UName = "Ryan Chow", UPass = "123456", UAge = 27, UAddress = "Earth"}, 34 35 }; 36 37 38 39 var temp = (from u in userList select u).ToList(); 40 41 return temp; 42 43 } 44 45 } 46 47 }
5、最后F5调试项目，输入localhost:5381/api/user/getuser
