C# URL中的http鏈接進行分析,將相對路徑轉換爲絕對路徑 源代碼

    /// <summary>

        /// URL中的http鏈接進行分析,將相對路徑轉換爲絕對路徑 

        ///     寧夏大學 張冬zd4004.blog.163.com

        /// </summary>

        /// <param ></param>

        /// <param ></param>

        /// <returns></returns>

        public string Data2Url(string surl, string nurlt)

        {

            surl = surl.Trim();

            nurlt = nurlt.Trim();

            if (nurlt.IndexOf("http://") == 0)

            {

                return nurlt;

            }

            //if (nurlt.IndexOf('#') > -1 | nurlt.IndexOf("") > -1 | nurlt.IndexOf("mailto:") > -1 | nurlt == null)

            if (nurlt.IndexOf('#') > -1 | nurlt.IndexOf("") > -1  | nurlt == null)

            {

                return "";  //此爲js  鏈接　無法處理

            }

            if (surl.ToLower().IndexOf("http://") != 0 | surl.Length < 11)

            {

                // 源不是url 返回錯誤  ./http://bt.joyyang.com/thread.php?fid=2

                return "";

            }

            nurlt = nurlt.Trim();

            nurlt = nurlt.Replace("/r", "");

            nurlt = nurlt.Replace("/n", "");

            if (nurlt.Length == 0 | nurlt == "." | nurlt == "/" | nurlt == "./")

            {

                return "";

            }

            try

            {

                Uri baseUri = new Uri(surl);

                Uri absoluteUri = new Uri(baseUri, nurlt);

                return absoluteUri.ToString();   //    

            }

            catch

            {

                return "";

            }

        }