#region 判断Url参数是否UTF8编码
        public static bool IsUTF8(string url)
        {
            byte[] buf = GetUrlCodingToBytes(url);
            return IsTextUTF8(buf);
        }
        private static bool IsTextUTF8(byte[] buf)
        {
            int i;
            byte cOctets = 0; // octets to go in this UTF-8 encoded character  
            bool bAllAscii = true;
            long iLen = buf.Length;
            for (i = 0; i < iLen; i++)
            {
                if ((buf[i] & 0x80) != 0) bAllAscii = false;if (cOctets == 0)
                {
                    if (buf[i] >= 0x80)
                    {
                        do
                        {
                            buf[i] <<= 1;
                            cOctets++;
                        }
                        while ((buf[i] & 0x80) != 0);

                        cOctets