字符编码转换问题将base64转换成string

Question

string ss="id003";
byte [] b= System.Text.Encoding.Default.GetBytes(ss);
sponse.Write(Convert.ToBase64String(b,0,b.Length));我将string最终转换到了base64,怎么将base64转换回以前的string？

Answer 1

ToBase64String
FromBase64String

Answer 2

  public static String EncryptBase64Code(String text)
        {
            Byte[] bufin = System.Text.ASCIIEncoding.UTF8.GetBytes(text);
            String result = Convert.ToBase64String(bufin, 0, bufin.Length);
            return result;
        }        public static String DecryptBase64Code(String text)
        {
            try
            {
                Byte[] bufout = Convert.FromBase64String(text);
                String result = System.Text.ASCIIEncoding.UTF8.GetString(bufout);
            return result;
            }
            catch
            {
                return text;
            }
        } 

Answer 3

byte[] targetBytes = Convert.FromBase64String("testing");
string targetStrs = Convert.ToBase64String(targetBytes);

Answer 4

   string ss = "id003";
            byte[] b = System.Text.Encoding.Default.GetBytes(ss);            string _Base64 =Convert.ToBase64String(b, 0, b.Length);
            byte[] _BaseByte = Convert.FromBase64String(_Base64);            string _ValueText= System.Text.Encoding.Default.GetString(_BaseByte);