C# Convert numbers to hexadecimal and convert strings to hexadecimal

 Convert numbers to hexadecimal. The premise is that what you enter must be numbers and nothing else.

private string StringToHexString(string s)//数字转换16进制
        {
            long Num = Convert.ToInt32(s);//防止溢出
            string str = Convert.ToString(Num, 16);
            string Msg = "0x" + (str.Length == 1 ? "0" + str : str);//转换成指定格式
            return Msg;
        }

String conversion to hexadecimal, here we refer to many other people's methods. You can use StringBuilder, or you can convert it one by one and then store it . It depends on personal preference.

        public string ToStrFromByte(byte[] byteDatas)//字符串转化16进制

        {
            string Msg = "";
            //StringBuilder builder = new StringBuilder();
            for (int i = 0; i < byteDatas.Length; i++)
            {
                string str = Convert.ToString(byteDatas[i], 16);
                Msg = "0x" + (str.Length == 1 ? "0" + str : str);//转换成16进制格式
                //builder.Append(string.Format("{0:X2} ", byteDatas[i]));
            }
            return Msg;
        }

The final effect is achieved (taking the serial port program I learned to make as an example):