Web API 学习笔记3

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using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Text;   namespace ZB.QueueSys.Common {     public class WebApiHelper     {         //定义一个用于保存静态变量的实例         private static WebApiHelper instance = null;         //定义一个保证线程同步的标识         private static readonly object locker = new object();         //构造函数为私有，使外界不能创建该类的实例         private WebApiHelper() { }         public static WebApiHelper Instance         {             get             {                 if (instance == null)                 {                     lock (locker)                     {                         if (instance == null) instance = new WebApiHelper();                     }                 }                 return instance;             }         }           public string HttpGet(string url)         {             //string ss = HttpGet("http://localhost:000/api/Demo/GetXXX?Name=北京");             //ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);             Encoding encoding = Encoding.UTF8;             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);             request.Method = "GET";             request.Accept = "text/html, application/xhtml+xml, */*";             request.ContentType = "application/json";               HttpWebResponse response = (HttpWebResponse)request.GetResponse();             using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))             {                 string str = reader.ReadToEnd();                 return str;             }         }           public string HttpPost(string url, string body)         {             //string ss = HttpPost("http://localhost:000/api/Demo/PostXXX", "{Code:\"test089\",Name:\"test1\"}");             //ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);             Encoding encoding = Encoding.UTF8;             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);             request.Method = "POST";             request.Accept = "text/html, application/xhtml+xml, */*";             request.ContentType = "application/json";               byte[] buffer = encoding.GetBytes(body);             request.ContentLength = buffer.Length;             request.GetRequestStream().Write(buffer, 0, buffer.Length);             HttpWebResponse response = (HttpWebResponse)request.GetResponse();             using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))             {                 return reader.ReadToEnd();             }         }         } }