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C# Get、Post、Put、Delete請求WebAPI方法

  1         /// <summary>
  2         /// Get方法
  3         /// </summary>
  4         /// 例如：http://localhost:30202/api/ValuesTest/Sum?num1=1&num2=3
  5         /// <param name="postData">后缀（?num1=1&num2=3）</param>
  6         /// <param name="Url">url（http://localhost:30202/api/ValuesTest/Sum）</param>
  7         /// <returns></returns>
  8         public static string GetInfo(string postData, string Url)
  9         {
 10             try
 11             {
 12                 byte[] byteArray = Encoding.UTF8.GetBytes(postData);
 13                 HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(Url);
 14                 webRequest.Method = "GET";
 15                 webRequest.Accept = "application/json, text/javascript, */*";  // 出错就删掉
 16                 webRequest.ContentType = "application/json; charset=utf-8";
 17                 webRequest.ContentLength = byteArray.Length;
 18  
 19                 HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
 20                 using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
 21                 {
 22                     return sr.ReadToEnd(); // 返回的数据
 23                 }
 24             }
 25             catch (Exception ex)
 26             {
 27                 throw new Exception(ex.Message);
 28             }
 29         }
 30 
 31         /// <summary>
 32         /// Post请求
 33         /// </summary>
 34         /// <param name="url">URL</param>
 35         /// <param name="body">application/json</param>
 36         /// <returns></returns>
 37         public static string HttpPost(string url, string body)
 38         {
 39             try
 40             {
 41                 byte[] byteArray = Encoding.UTF8.GetBytes(body);
 42                 HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
 43                 webRequest.Method = "POST";
 44                 webRequest.Accept = "application/json, text/javascript, */*";
 45                 webRequest.ContentType = "application/json; charset=utf-8";
 46                 webRequest.ContentLength = byteArray.Length;
 47                 webRequest.GetRequestStream().Write(byteArray, 0, byteArray.Length);
 48 
 49                 HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
 50                 using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
 51                 {
 52                     return sr.ReadToEnd();
 53                 }
 54             }
 55             catch (Exception ex)
 56             {
 57                 throw new Exception(ex.Message);
 58             }
 59         }
 60 
 61         /// <summary>
 62         /// Put请求-必有body
 63         /// </summary>
 64         /// <param name="url">URL</param>
 65         /// <param name="body">application/json</param>
 66         /// <returns></returns>
 67         public static string HttpPut(string url, string body)
 68         {
 69             try
 70             {
 71                 byte[] byteArray = Encoding.UTF8.GetBytes(body);
 72                 HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
 73                 webRequest.Method = "PUT";
 74                 webRequest.Accept = "application/json, text/javascript, */*";
 75                 webRequest.ContentType = "application/json";
 76                 webRequest.ContentLength = byteArray.Length;
 77                 webRequest.GetRequestStream().Write(byteArray, 0, byteArray.Length);
 78 
 79                 HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
 80                 using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
 81                 {
 82                     return sr.ReadToEnd();
 83                 }
 84             }
 85             catch (Exception ex)
 86             {
 87                 throw new Exception(ex.Message);
 88             }
 89         }
 90 
 91         /// <summary>
 92         /// Delete请求-必有body
 93         /// </summary>
 94         /// <param name="url">URL</param>
 95         /// <param name="body">application/json</param>
 96         /// <returns></returns>
 97         public static string HttpDelete(string url, string body)
 98         {
 99             try
100             {
101                 byte[] byteArray = Encoding.UTF8.GetBytes(body);
102                 HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
103                 webRequest.Method = "DELETE";
104                 webRequest.Accept = "application/json, text/javascript, */*";
105                 webRequest.ContentType = "application/json";
106                 webRequest.ContentLength = byteArray.Length;
107                 webRequest.GetRequestStream().Write(byteArray, 0, byteArray.Length);
108 
109                 HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
110                 using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
111                 {
112                     return sr.ReadToEnd();
113                 }
114             }
115             catch (Exception ex)
116             {
117                 throw new Exception(ex.Message);
118             }
119         }
365个夜晚，我希望做到两天更一篇博客。加油，小白！
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原文地址：https://www.cnblogs.com/qq2806933146xiaobai/p/15397848.html