using Newtonsoft.Json;

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.ComponentModel.DataAnnotations;

using System.IO;

using System.Net;

using System.Reflection;

using System.Text;

namespace Test

{

    class Program

    {

        static void Main(string[] args)

        {

            string url = "http://www.baidus.com";

            string contentType = "application/x-www-form-urlencoded";

            int timeOut = ;

            string parms = "";

            int encoding = ;

            HttpWebRequest(url, parms, encoding, contentType, timeOut);

        }

        public static void HttpWebRequest(string url, string parms, int encoding, string contentType = "application/x-www-form-urlencoded", int timeOut = )

        {

            try

            {

                string result = string.Empty;

                var mRequest = (HttpWebRequest)WebRequest.Create(url);

                //相应请求的参数

                var data = Encoding.GetEncoding(encoding).GetBytes(parms);

                mRequest.Method = "Post";

                mRequest.ContentType = contentType;

                mRequest.ContentLength = data.Length;

                mRequest.Timeout = timeOut;

                mRequest.KeepAlive = true;

                mRequest.ProtocolVersion = HttpVersion.Version10;

                //请求流

                var requestStream = mRequest.GetRequestStream();

                requestStream.Write(data, , data.Length);

                requestStream.Close();

                //响应流

                var mResponse = mRequest.GetResponse() as HttpWebResponse;//此位置进入catch(403)

                var responseStream = mResponse.GetResponseStream();//

                if (responseStream != null)

                {

                    var streamReader = new StreamReader(responseStream, Encoding.GetEncoding(encoding));

                    //获取返回的信息

                    result = streamReader.ReadToEnd();

                    streamReader.Close();

                    responseStream.Close();

                }

            }

            catch (System.Net.WebException ex)

            {

                string result = string.Empty;

                //响应流

                var mResponse = ex.Response as HttpWebResponse;

                var responseStream = mResponse.GetResponseStream();

                if (responseStream != null)

                {

                    var streamReader = new StreamReader(responseStream, Encoding.GetEncoding(encoding));

                    //获取返回的信息

                    result = streamReader.ReadToEnd();

                    streamReader.Close();

                    responseStream.Close();

                }

                result = "获取数据失败，请重试！" + url + ex.ToString() + "         返回数据" + result;

            }

        }

    }

}