获取远程网页的内容之二（downmoon原创）

本文仅针AD下代理上网的情况：
代码如下：
1、定义变量：

 定义变量#region　 定义变量
private    string strFireWallIP
        ...{
            get
            ...{
                return System.Configuration.ConfigurationSettings.AppSettings["strFireWallIP"];
            }
        }
        private    string strFireWallPort
        ...{
            get
            ...{
                return System.Configuration.ConfigurationSettings.AppSettings["strFireWallPort"];
            }
        }
        private    string strUID
        ...{
            get
            ...{
                return System.Configuration.ConfigurationSettings.AppSettings["strUID"];
            }
        }
        private    string strPWD
        ...{
            get
            ...{
                return System.Configuration.ConfigurationSettings.AppSettings["strPWD"];
            }
        }
        private    string strDomain
        ...{
            get
            ...{
                return System.Configuration.ConfigurationSettings.AppSettings["strDomain"];
            }
        }
        #endregion

方法：
获取指定远程网页内容

 /**//// <summary>
        /// 获取指定远程网页内容
        /// </summary>
        /// <param name="strUrl">所要查找的远程网页地址</param>
        /// <returns></returns>
        //[WebMethod(Description = "获取指定远程网页内容。")]
        public string getPageContent(string strUrl)
        ...{
            string strResult        =    "";
            this.CurrentUrl    =     strUrl;
            if(this.CurrentUrl.ToLower().StartsWith("http://")==false)
                this.CurrentUrl = "http://"+this.CurrentUrl;
            try
            ...{
                contentBytes    = GetHtmlByte(CurrentUrl);
            
            }
            catch(Exception err)
            ...{
                strResult = "请求错误：" + err.Message;
            }
            if(contentBytes==null)
            ...{
                throw new Exception("没有获得返回值");
            }
            strResult        =    getStringFromByteArray(contentBytes,Encoding.UTF8);
            return strResult;
        }

获取指定远程网页元素字节数组::

 获取指定远程网页元素字节数组#region 获取指定远程网页元素字节数组
        /**//// <summary>
        /// 获取指定远程网页元素字节数组
        /// </summary>
        /// <param name="strUrl">所要查找的远程网页地址</param>
        /// <returns></returns>
        private byte[] GetHtmlByte(string strUrl)
        ...{
            string strPara=(strUrl.IndexOf("?")>=0?strUrl.Substring(strUrl.IndexOf("?")+1):"");
            System.Text.Encoding encoding    =    new UTF8Encoding();
            byte[]  byte1                    =    encoding.GetBytes(strPara);
            byte[]    byteReturn                =    new byte[10000000];
            if(strUrl.Trim().ToLower().StartsWith("http://")==false)
            ...{
                strUrl = "http://"+strUrl;
            }
            HttpWebRequest myHttpWebRequest        =    (HttpWebRequest)WebRequest.Create(strUrl);
            myHttpWebRequest.AllowAutoRedirect    =    true;       
            myHttpWebRequest.KeepAlive            =    true;
            myHttpWebRequest.UserAgent            =    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)";
            System.Net .WebProxy  proxy = new WebProxy(strFireWallIP+":"+strFireWallPort,true);
            //proxy=(WebProxy)System.Net.GlobalProxySelection.Select;
            System.Net.NetworkCredential myCredential = new NetworkCredential(strUID,strPWD,strDomain);
            proxy.Credentials =myCredential;
            myHttpWebRequest.Proxy = proxy;


            HttpWebResponse myHttpWebResponse    =    (HttpWebResponse)myHttpWebRequest.GetResponse();
            byte[] bRead    =    new byte[1024];
            int lngCount    =    1;
            int totalLen    =    0;
            Stream recWeb    =    myHttpWebResponse.GetResponseStream();   
            lngCount        =    recWeb.Read(bRead,0,1024);
            while(lngCount>0)
            ...{
                Array.Copy(bRead,0,byteReturn,totalLen,lngCount);
                totalLen    +=    lngCount;
                lngCount    =    recWeb.Read(bRead,0,1024);
            }
            recWeb.Close();
            byte[] byteGets =    new byte[totalLen];
            Array.Copy(byteReturn,0,byteGets,0,totalLen);
            byteReturn        =    null;
            bRead            =    null;
        
            return byteGets;
        }
        #endregion

转换指定字节数组为字符串::

     转换指定字节数组为字符串#region　转换指定字节数组为字符串
        /**//// <summary>
        /// 转换指定字节数组为字符串
        /// </summary>
        /// <param name="ByteGet">字节数组Byte[]</param>
        /// <param name="myEncoding">编码方式</param>
        /// <returns></returns>
        private static string getStringFromByteArray(Byte[] ByteGet,Encoding myEncoding)
        ...{
            int i,lngCount;
            StringBuilder aTemp = new StringBuilder(10000);
            lngCount = ByteGet.Length;
            for(i = 0;i<lngCount;i+= 10000)
            ...{
                aTemp.Append(myEncoding.GetString(ByteGet,i,(lngCount>=i+10000?10000:lngCount - i)));
            }
            if(i<=lngCount)
            ...{
                aTemp.Append(myEncoding.GetString(ByteGet,i,(lngCount - i)));
            }
            return aTemp.ToString();
        }

        #endregion

借用这个，写了个抽取中国天气网预报的服务！很爽！
http://dev.csdn.net/author/downmoon/52ed7df0af0e4136a46323db9eeae852.html