怎么做一个新闻发布网站 高手们给点建议

Question

//获取http页面函数        public string Get_Http(string a_strUrl,int timeout)        {            string strResult ;                      try            {HttpWebRequest myReq = (HttpWebRequest)HttpWebRequest.Create(a_strUrl) ;                myReq.Timeout = timeout;                HttpWebResponse HttpWResp = (HttpWebResponse)myReq.GetResponse();                            Stream myStream = HttpWResp.GetResponseStream () ;                 StreamReader sr = new StreamReader(myStream , Encoding.Default);                StringBuilder strBuilder = new StringBuilder();                while (-1 != sr.Peek())                {                    strBuilder.Append(sr.ReadLine()+"\r\n");                }                 strResult = strBuilder.ToString();            }            catch(Exception exp)            {                strResult = "错误：" + exp.Message ;            }             return strResult ;         }获取页面内容后，分析页面中连接地址取到要抓取的url：//处理页面标题和链接        public string SniffWebUrl( string urlStr,string blockB,string blockE )        {                   string urlch1 = "";            string urlch2 = "";                                int end_n1 = 0;            int end_nums = 0;            int end_nums1 = 0;            int end_nums2 = 0;            int end_nums3     = 0;                        string reUTStr = "";            string reTitle = "";            string ret = "";                       try            {                int pos01 = urlStr.IndexOf( "." );                int pos02 = urlStr.LastIndexOf( "/" );                if( pos01 < 0 )                 {                    return "";                }                if( pos02 < 0 )                 {                    return "";                }                int pos03 = urlStr.IndexOf( "/",pos01 );                if ( pos03 < 0 )                {                    urlch1 = urlStr;                    urlch2 = urlStr;                }                else                {                    urlch1 = urlStr.Substring( 0,pos03 );                    urlch2 = urlStr.Substring( 0,pos02 );                }                 string tmpAllStr = new PublicFun().Get_Http( urlStr ,time1);                 int pos1 = tmpAllStr.IndexOf( blockB );                int pos2 = tmpAllStr.IndexOf( blockE,pos1 + blockB.Length );                if ( pos1>0 && pos2>0 && pos2>pos1 )                {                    ret = tmpAllStr.Substring( pos1 + blockB.Length,pos2 - pos1 - blockB.Length );                    ret = ret.Substring( ret.IndexOf( "<" ));                    while( ret.IndexOf( "<A" ) >= 0 )                    {                        ret = ret.Substring( 0,ret.IndexOf( "<A" ) ) + "<a" + ret.Substring( ret.IndexOf( "<A" ) + 2 );                    }                    while( ret.IndexOf( "</A" ) >=0 )                    {                        ret = ret.Substring( 0,ret.IndexOf( "</A" ) ) + "</a" + ret.Substring( ret.IndexOf( "</A" ) + 3 );                    }                    while( ret.IndexOf( "Href=" ) >=0 )                    {                        ret = ret.Substring( 0,ret.IndexOf( "Href=" )) + "href=" + ret.Substring( ret.IndexOf( "Href=" ) + 5 );                    }                    while( ret.IndexOf( "HREF=" ) >=0 )                    {                        ret = ret.Substring( 0,ret.IndexOf( "HREF=" )) + "href=" + ret.Substring( ret.IndexOf( "HREF=" ) + 5 );                    }                    while( ret.IndexOf( "href='" ) >=0 )                    {                        ret = ret.Substring( 0,ret.IndexOf( "href='" )) + "href=\"" + ret.Substring( ret.IndexOf( "href='" ) + 6 );