URL中文编码

        /// <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);
        }

 ///C# 32位md5
/// <summary>
/// 获得32位的MD5加密
/// </summary>
/// <param name="str">加密字符串</param>
/// <returns>返回值</returns>

public static string GetMD532(string str)
{
    MD5 md5 = MD5.Create();
    byte[] d = md5.ComputeHash(Encoding.Default.GetBytes(str));
    return BitConverter.ToString(d).Replace("-", "").ToLower();

}