C#返回绝对URL地址

        /// <summary>

        /// 返回绝对URL地址

        /// </summary>

        /// <param name="fromUrl">来源URL</param>

        /// <param name="url">搜索到的地址</param>

        /// <returns>绝对URL地址</returns>

        public static string GetABSUrl(string fromUrl, string url)

        {

            string _url = "";

            string _domain = "";

            string _path = "";

            if (!CheckURL(fromUrl))

            {

                throw new Exception("来源URL格式不正确");

            }

            else

            {

                _domain = fromUrl.Remove(fromUrl.IndexOf("/", 7));

                _path = fromUrl.Remove(fromUrl.LastIndexOf("/"));

            }



            if (url == "")

            {

                _url = "";

            }

            else if(url.IndexOf(@"http://")==0)

            {

                _url = url;

            }

            else if (url.IndexOf(@"/") == 0)

            {

                _url = _domain + url;

            }

            else

            {

                _url = _path + "/" + url;

            }

            return _url;

        }