详解c# .net core 下的网络请求

 /// 
 /// 异步请求post（键值对形式,可等待的） /// 
 /// 网络基址("http://localhost:59315") /// 网络的地址("/api/UMeng") /// 键值对List> formData = new List>();formData.Add(new KeyValuePair("userid", "29122"));formData.Add(new KeyValuePair("umengids", "29122")); /// 编码格式 /// 头媒体类型 ///  public async Task HttpPostAsync(string uri, string url, List> formData = null, string charset = "UTF-8", string mediaType = "application/x-www-form-urlencoded") { string tokenUri = url; var client = new HttpClient(); client.BaseAddress = new Uri(uri); HttpContent content = new FormUrlEncodedContent(formData); content.Headers.ContentType = new MediaTypeHeaderValue(mediaType); content.Headers.ContentType.CharSet = charset; for (int i = 0; i 

 /// 
 /// 同步请求post（键值对形式） /// 
 /// 网络基址("http://localhost:59315") /// 网络的地址("/api/UMeng") /// 键值对List> formData = new List>();formData.Add(new KeyValuePair("userid", "29122"));formData.Add(new KeyValuePair("umengids", "29122")); /// 编码格式 /// 头媒体类型 ///  public string HttpPost(string uri, string url, List> formData = null, string charset = "UTF-8", string mediaType = "application/x-www-form-urlencoded") { string tokenUri = url; var client = new HttpClient(); client.BaseAddress = new Uri(uri); HttpContent content = new FormUrlEncodedContent(formData); content.Headers.ContentType = new MediaTypeHeaderValue(mediaType); content.Headers.ContentType.CharSet = charset; for (int i = 0; i 

 public string Post(string url, string data, Encoding encoding, int type) { try { HttpWebRequest req = WebRequest.CreateHttp(new Uri(url)); if (type == 1) { req.ContentType = "application/json;charset=utf-8"; } else if (type == 2) { req.ContentType = "application/xml;charset=utf-8"; } else { req.ContentType = "application/x-www-form-urlencoded;charset=utf-8"; } req.Method = "POST"; //req.Accept = "text/xml,text/javascript"; req.ContinueTimeout = 60000; byte[] postData = encoding.GetBytes(data); Stream reqStream = req.GetRequestStreamAsync().Result; reqStream.Write(postData, 0, postData.Length); reqStream.Dispose(); var rsp = (HttpWebResponse)req.GetResponseAsync().Result; var result = GetResponseAsString(rsp, encoding); return result; } catch (Exception ex) { throw; } } 

 private string GetResponseAsString(HttpWebResponse rsp, Encoding encoding) { Stream stream = null; StreamReader reader = null; try { // 以字符流的方式读取HTTP响应 stream = rsp.GetResponseStream(); reader = new StreamReader(stream, encoding); return reader.ReadToEnd(); } finally { // 释放资源 if (reader != null) reader.Dispose(); if (stream != null) stream.Dispose(); if (rsp != null) rsp.Dispose(); } } 

 /// 
 /// 异步请求get(UTF-8) /// 
 /// 链接地址 /// 写在header中的内容 ///  public static async Task HttpGetAsync(string url, List> formData = null) { HttpClient httpClient = new HttpClient(); HttpContent content = new FormUrlEncodedContent(formData); if (formData != null) { content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded"); content.Headers.ContentType.CharSet = "UTF-8"; for (int i = 0; i 

 /// 
 /// 同步get请求 /// 
 /// 链接地址 /// 写在header中的键值对 ///  public string HttpGet(string url, List> formData = null) { HttpClient httpClient = new HttpClient(); HttpContent content = new FormUrlEncodedContent(formData); if (formData != null) { content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded"); content.Headers.ContentType.CharSet = "UTF-8"; for (int i = 0; i  temp = resp.Content.ReadAsStringAsync(); temp.Wait(); return temp.Result; }