c# serialport读取不限数量的16进制数据

//private char[] HexChar = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

 

 private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

            char hexH;

            char hexL;

            byte receivebyte;

            string dataToshow = "";

            while (serialPort1.BytesToRead > 0)

            {

                receivebyte = (byte)serialPort1.ReadByte();

                hexH = HexChar[receivebyte / 16];

                hexL = HexChar[receivebyte % 16];

                dataToshow += hexH.ToString() + hexL.ToString();

            }

            this.tBox.Invoke(new MethodInvoker(delegate

            {

                this.tBox.AppendText(dataToshow + " ");

            }));

        }