设置字符串自动添加流水号

 public int Asc(string character)
        {
            if (character.Length == 1)
            {
                System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
                int intAsciiCode = (int)asciiEncoding.GetBytes(character)[0];
                return (intAsciiCode);
            }
            else
            {
                throw new Exception("Character is not valid.");
            }

        }

        public string Chr(int asciiCode)
        {
            if (asciiCode >= 0 && asciiCode <= 255)
            {
                System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
                byte[] byteArray = new byte[] { (byte)asciiCode };
                string strCharacter = asciiEncoding.GetString(byteArray);
                return (strCharacter);
            }
            else
            {
                throw new Exception("ASCII Code is not valid.");
            }
        }

        public string strinc(string s1, int hex)
        {
            string str, newstr;
            int index = 0;
            int newInt;
            str = s1.Trim().Replace(" ", "");
            str = str.ToUpper();
            if (hex == 10)
            {
                for (int i = str.Length - 1; i > 0; i--)
                {
                    if (str[i] != (char)57)
                    {
                        index = i;
                        break;
                    }
                }
                newInt = Convert.ToInt32(str.Substring(index)) + 1;
                str = str.Substring(0, index) + newInt.ToString();
            }
            else if (hex == 16)
            {
                newstr = "";
                for (int i = str.Length - 1; i > 0; i--)
                {
                    if (str[i] == (char)57)
                    {
                        newstr = "A";
                        index = i;
                        break;
                    }
                    else if (str[i] != (char)70)
                    {
                        newstr = Chr(Asc(str.Substring(i, 1)) + 1);
                        index = i;
                        break;
                    }
                }
                str = str.Substring(0, index) + newstr + str.Substring(index + 1).Replace("F", "0");
            }
            return str;
        }