http请求POST和GET调用接口以及反射动态调用Webservices类

using System;
using System.IO;
using System.Net;
using System.Text;
using System.Web;
using System.Collections.Generic;
using System.CodeDom.Compiler;
using System.Web.Services.Description;
using System.CodeDom;
using Microsoft.CSharp;
/*********************
* 描述：提供http、POST和GET、Webservices动态访问远程接口
 * *******************/
namespace Demo
{
    public static class HttpHelper
    {
        ///  
        /// 有关HTTP请求的辅助类
        /// 
        private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";//浏览器 
        private static Encoding requestEncoding = System.Text.Encoding.UTF8;//字符集 
  #region 创建GET方式的HTTP请求
        ///
        /// 创建GET方式的HTTP请求   
        ///
        /// 接口URL
        /// 接口URL的参数
        /// 调用接口返回的信息
        ///
        public static bool HttpGet(string url, Dictionary dctParam, out string HttpWebResponseString)
        {
            if (string.IsNullOrEmpty(url))
            {
                throw new ArgumentNullException("url");
            }

            HttpWebResponseString = "";

 

            HttpWebRequest request = null;

            Stream stream = null;//用于传参数的流 

            HttpWebResponse httpWebResponse = null;

  try
            {
                int i = 0;
                StringBuilder buffer = new StringBuilder();
                if (!(dctParam == null))
                {
                    foreach (string key in dctParam.Keys)
                    {
                        if (i > 0)
                        {
                            buffer.AppendFormat("&{0}={1}", key, (dctParam[key]));
                        }
                        else
                        {
                            buffer.AppendFormat("{0}={1}", key, (dctParam[key]));
                        }
                        i++;
                    }
                    url = url + "?" + buffer.ToString();
                }

                request = WebRequest.Create(url) as HttpWebRequest;
                request.Method = "GET";//传输方式  
                request.ContentType = "application/x-www-form-urlencoded";//协议
                request.UserAgent = DefaultUserAgent;//请求的客户端浏览器信息,默认IE 
                request.Timeout = 6000;//超时时间，写死6秒
                request.KeepAlive = false;
                //DefaultConnectionLimit是默认的2，而当前的Http的connection用完了，导致后续的GetResponse或GetRequestStream超时死掉
                System.Net.ServicePointManager.DefaultConnectionLimit = 50;
                request.ServicePoint.Expect100Continue = false;
                httpWebResponse = request.GetResponse() as HttpWebResponse;
                HttpWebResponseString = ReadHttpWebResponse(httpWebResponse);
                return true;
            }
            catch (Exception ee)
            {
                HttpWebResponseString = ee.ToString();
                return false;
            }
  finally
            {
                if (stream != null)
                {
                    stream.Close();
                }
                if (request != null)
                {
                    request.Abort();
                    request = null;
                }
                if (httpWebResponse != null)
                {
                    httpWebResponse.Close();
                    httpWebResponse = null;
                }
            }
        }      

        #endregion
   #region 创建POST方式的HTTP请求
        ///
        /// 创建POST方式的HTTP请求   
        ///
        /// 接口URL
        /// 接口URL的参数
        /// 调用接口返回的信息
        ///
        public static bool HttpPost(string url, Dictionary dctParam, out string HttpWebResponseString)
        {
            if (string.IsNullOrEmpty(url))
            {
                throw new ArgumentNullException("url");
            }
            HttpWebResponseString = "";
            HttpWebRequest request = null;
            Stream stream = null;//用于传参数的流 
try

            {
                url = EncodePostData(url);
                request = WebRequest.Create(url) as HttpWebRequest;
                request.Method = "POST";//传输方式 
                request.ContentType = "application/x-www-form-urlencoded";//协议
                request.UserAgent = DefaultUserAgent;//请求的客户端浏览器信息,默认IE  
                request.Timeout = 6000;//超时时间，写死6秒
                //DefaultConnectionLimit是默认的2，而当前的Http的connection用完了，导致后续的GetResponse或GetRequestStream超时死掉
                System.Net.ServicePointManager.DefaultConnectionLimit = 50;
                request.ServicePoint.Expect100Continue = false;
                //如果需求POST传数据，转换成utf-8编码
                byte[] Data = ParamDataConvert(dctParam);
                if (!(Data == null))
                {
                    string s = requestEncoding.GetString(Data);
                    stream = request.GetRequestStream();
                    stream.Write(Data, 0, Data.Length);
                }
                HttpWebResponse HttpWebResponse = request.GetResponse() as HttpWebResponse;
                HttpWebResponseString = ReadHttpWebResponse(HttpWebResponse);
                return true;
            }
            catch (Exception ee)
            {
                HttpWebResponseString = ee.ToString();
                return false;
            }
   finally

            {
                if (stream != null)
                {
                    stream.Close();
                }
            }
        }
        #endregion

  #region 反射动态调用WebServices
        ///
        /// 反射动态调用WebServices
        ///
        /// Webservices地址，以?WSDL结尾
        /// 调用的方法
        /// 调用方法的参数
        ///
        public static object InvokeWebService(string url, string methodname, object[] args)
        {
            string @namespace = "Demo";//本页的命名空间
            try
            {
                //获取WSDL
                WebClient wc = new WebClient();
                Stream stream = wc.OpenRead(url);
                ServiceDescription sd = ServiceDescription.Read(stream);
                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
                sdi.AddServiceDescription(sd, "", "");
                CodeNamespace cn = new CodeNamespace(@namespace);
                //生成客户端代理类代码
                CodeCompileUnit ccu = new CodeCompileUnit();
                ccu.Namespaces.Add(cn);
                sdi.Import(cn, ccu);
                CSharpCodeProvider csc = new CSharpCodeProvider();
                CSharpCodeProvider icc = new CSharpCodeProvider();
                //设定编译参数
                CompilerParameters cplist = new CompilerParameters();
                cplist.GenerateExecutable = false;
                cplist.GenerateInMemory = true;
                cplist.ReferencedAssemblies.Add("System.dll");
                cplist.ReferencedAssemblies.Add("System.XML.dll");
                cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
                cplist.ReferencedAssemblies.Add("System.Data.dll");

//编译代理类
                CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
                if (true == cr.Errors.HasErrors)
                {
                    System.Text.StringBuilder sb = new System.Text.StringBuilder();
                    foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
                    {
                        sb.Append(ce.ToString());
                        sb.Append(System.Environment.NewLine);
                    }
                    throw new Exception(sb.ToString());
                }
                //生成代理实例，并调用方法
                System.Reflection.Assembly assembly = cr.CompiledAssembly;
                Type[] types = assembly.GetTypes();
                Type t = types[0];
                object obj = Activator.CreateInstance(t);
                System.Reflection.MethodInfo mi = t.GetMethod(methodname);
                return mi.Invoke(obj, args);
            }
            catch (Exception ex)

            {
              }

            return null;
        }
        #endregion
    ///
        /// 接口参数转换
        ///
        /// 接口参数集合包
        ///
        private static byte[] ParamDataConvert(Dictionary dctParam)
        {
            if (dctParam == null) return null;
            try
            {
                Encoding requestEncoding = System.Text.Encoding.UTF8;//字符集
                StringBuilder buffer = new StringBuilder();
                int i = 0;
                foreach (string key in dctParam.Keys)

                {

                    if (i > 0)

                    {
                        buffer.AppendFormat("&{0}={1}", key, (dctParam[key]));
                    }
                    else
                    {
                        buffer.AppendFormat("{0}={1}", key, (dctParam[key]));
                    }
                    i++;
                }
                string PostData = buffer.ToString();
                byte[] data = requestEncoding.GetBytes(buffer.ToString());
                return data;
            }
            catch (Exception ex)
            {
             }
            return null;
        }
    ///  
        /// 获取数据 
        ///  
        /// 响应对象 
        /// </returns> 
        public static string ReadHttpWebResponse(HttpWebResponse HttpWebResponse)
        {
            Stream responseStream = null;
            StreamReader sReader = null;
            String value = null;
            try
            {
                // 获取响应流 
                responseStream = HttpWebResponse.GetResponseStream();
                // 对接响应流(以"utf-8"字符集) 
                sReader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
                // 开始读取数据 
                value = sReader.ReadToEnd();
            }
            catch (Exception ee)
            {
                throw ee;
            }

            finally
            {
                //强制关闭 
                if (sReader != null)
                {
                    sReader.Close();
                }
                if (responseStream != null)

                {
                    responseStream.Close();
                }
                if (HttpWebResponse != null)

                {
                    HttpWebResponse.Close();
                }

            }
            return value;
        }
        public static string EncodePostData(string Data)
        {

            string EncodeData = HttpUtility.UrlDecode(Data);
            return EncodeData;
        }
    }
}