Url中文编码

 几个重要的方法：

                 Encoding.UTF8.GetString(byte[])
                 Encoding.UTF8.GetBytes(String) 
                 Encoding.GetEncoding(String).GetBytes(String) 
                 Encoding.GetEncoding(String).GetString(byte[]) 
                 Convert.ToString(byte,int)
                 Convert.ToByte(String,int)

    class Program    {        static void Main(string[] args)        {            string str = "中文大吧天";            //Gb2312编码            Console.WriteLine(GB2312(str));            //GB2312解码            Console.WriteLine(DeGB2312(GB2312(str)));            //UTF8编码            Console.WriteLine(EnUTF8(str));            //UTF8解码            Console.WriteLine(DeUTF8(EnUTF8(str)));                    Console.ReadKey();        }        /// <summary>        /// GB2312编码        /// </summary>        /// <param name="str">待编码字符</param>        /// <returns>编码结果</returns>        public static string GB2312(string str)        {            StringBuilder sb = new StringBuilder();            //GB2321的编码方式            byte[] byStr = System.Text.Encoding.GetEncoding ("GB2312").GetBytes(str);             for (int i = 0; i < byStr.Length; i++)            {                //转换为16进制方式 可选2,8,10,16进制                sb.Append(@"%" + Convert.ToString(byStr[i], 16));            }            return (sb.ToString());        }         /// <summary>        /// GB2312解码        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static string DeGB2312(string str)        {            byte[] bytes = new byte[str.Split('%').Length ];            int i=0;            foreach (var item in str.Split('%'))            {                if (item !="")                {                    //转换为16进制的字节                    bytes[i] = Convert.ToByte(item,16);                    i++;                }                          }            //GB2312的解码            return Encoding.GetEncoding ("GB2312").GetString(bytes);        }        /// <summary>        /// UTF8编码        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static string EnUTF8(string str)        {            StringBuilder sb = new StringBuilder();            byte[] byStr = System.Text.Encoding.UTF8.GetBytes(str);             for (int i = 0; i < byStr.Length; i++)            {                sb.Append(@"%" + Convert.ToString(byStr[i], 16));            }            return (sb.ToString());        }        /// <summary>        /// UTF8解码        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static string DeUTF8(string str)        {            byte[] bytes = new byte[str.Split('%').Length ];            int i=0;            foreach (var item in str.Split('%'))            {                if (item !="")                {                    bytes[i] = Convert.ToByte(item,16);                    i++;                }                          }            return Encoding.UTF8.GetString(bytes);        }    }

程序链接