WebApi个人理解概要

WebApi概要

1. Global文件的作用：

   public  class  MvcApplication : System.Web.HttpApplication
   {
       protected  void  Application_Start()
       {
           //1.注册区域路由
           AreaRegistration.RegisterAllAreas();
           //2.注册webApi的路由
           WebApiConfig.Register(GlobalConfiguration.Configuration);
           //3.注册全局过滤器
           FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
           //4.注册网站路由
           RouteConfig.RegisterRoutes(RouteTable.Routes);
           //5.优化js、cs
           BundleConfig.RegisterBundles(BundleTable.Bundles);
       }
   }

2. WebApi特点

1. 类必须继承ApiController            

2. 返回类型不再是ActionResult

3. 默认是请求WebApi控制器中的和HttpMethod同名的方法

3. 设置当前WebApi的默认返回格式为json--移除xml格式

1. config.Formatters.Remove(config.Formatters.XmlFormatter);

4. 网站访问WebApi，要提供相应的url接口

   //http://localhost:4221/api/values/getpiglist
   protected  void  Page_Load( object  sender, EventArgs e)
   {
       //1.拼装要请求数据的url
       string  url =  "http://localhost:4221/api/values/getpiglist" ;
       //2.利用C#模拟浏览器发出请求
       WebRequest request = WebRequest.Create(url);
       //2.1设置请求方式，如果不设置则默认为get
       request.Method =  "get" ;
       //3.获取响应报文
       WebResponse response = request.GetResponse();
       //4.获取相应报文体的字节数据byte[]
       System.IO.Stream responseBody = response.GetResponseStream();
       //5.将字节数据转换为字符串
       using (StreamReader sr= new  StreamReader(responseBody))
       {
           //5.1将相应报文体转换为json字符串
           string  responseBodyText = sr.ReadToEnd();
           //5.2利用json序列化器将json字符串反序列化为list集合
           System.Web.Script.Serialization.JavaScriptSerializer jss =  new  System.Web.Script.Serialization.JavaScriptSerializer();
           List<Entity> list = jss.Deserialize(responseBodyText,  typeof (List<Entity>))  as  List<Entity>;
           GridView1.DataSource = list;
           GridView1.DataBind();
       }
   }

5. 动态页面转静态

    1 private void MakeStaticPage(string url)
   
    2 {
   
    3 string txtHtml = "";
   
    4 string fileName = Guid.NewGuid().ToString() + ".html";
   
    5 //1.C#模拟浏览器发出请求
   
    6 WebRequest Request = WebRequest.Create(url);
   
    7 //2.获取Response对象
   
    8 WebResponse response = Request.GetResponse();
   
    9 //3.根据响应报文获取字节流
   
   10 Stream stream = response.GetResponseStream();
   
   11 //4.字节流转换为html文本，并存储到相应文本中
   
   12 using (StreamReader sr = new StreamReader(stream))
   
   13 {
   
   14 txtHtml = sr.ReadToEnd();
   
   15 File.WriteAllText(Server.MapPath("/staticPage/" + fileName), txtHtml);
   
   16 }
   
   17 Response.Write("<script>alert('静态化成功 !');</script>");
   
   18 }

    

三、MVC插件系统