///

        /// 编码

        ///

        ///

        ///

        ///

        public static string myUrlEncode(string str, Encoding encoding)

        {

            string encode = HttpUtility.UrlEncode(str, encoding);                                            //System.Text.Encoding.GetEncoding("GB2312")

            Console.WriteLine("编码:" + encode);

            return encode;

        }

        ///

        /// 解码URL.

        ///

        /// null为自动选择编码

        ///

        ///

        public static string MyUrlDeCode(string str, Encoding encoding)

        {

            if (encoding == null)

            {

                Encoding utf8 = Encoding.UTF8;

                //首先用utf-8进行解码                    

                string code = HttpUtility.UrlDecode(str.ToUpper(), utf8);

                //将已经解码的字符再次进行编码.

                string encode = HttpUtility.UrlEncode(code, utf8).ToUpper();

                if (str == encode)

                    encoding = Encoding.UTF8;

                else

                    encoding = Encoding.GetEncoding("gb2312");

            }

            return HttpUtility.UrlDecode(str, encoding);

        }