using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Text;using System.Threading.Tasks;namespace Common{    public  class HttpUtils    {        /// <summary>          /// GET请求与获取结果          /// </summary>          public static string HttpGet(string Url, string DataStr)        {            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (DataStr == "" ? "" : "?") + DataStr);            request.Method = "GET";            request.ContentType = "text/html;charset=UTF-8";            HttpWebResponse response = (HttpWebResponse)request.GetResponse();            Stream myResponseStream = response.GetResponseStream();            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);            string retString = myStreamReader.ReadToEnd();            myStreamReader.Close();            myResponseStream.Close();            return retString;        }        /// <summary>          /// POST请求与获取结果          /// </summary>          public static string HttpPost(string Url, string DataStr)        {            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);            request.Method = "POST";            request.ContentType = "application/x-www-form-urlencoded";            request.ContentLength = DataStr.Length;            StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.ASCII);            writer.Write(DataStr);            writer.Flush();            HttpWebResponse response = (HttpWebResponse)request.GetResponse();            string encoding = response.ContentEncoding;            if (encoding == null || encoding.Length < 1)            {                encoding = "UTF-8"; //默认编码              }            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));            string retString = reader.ReadToEnd();            return retString;        }      }}