c#中接收16進制串口數據(com), 在textbox顯示

static int buffersize = 18;   //十六進制數的大小（假設為6Byte）
byte[] buffer = new Byte[buffersize];   //創建緩沖區

private void button1_Click(object sender, EventArgs e)
{
    serialPort1.Read(buffer, 0, buffersize);
    string ss;
    ss = byteToHexStr(buffer); //用到函數byteToHexStr
    textBox2.Text = ss;
    serialPort1.Close();
    MessageBox.Show("數據接收成功！", "系統提示");
}

//字節數組轉16進制字符串
public static string byteToHexStr(byte[] bytes)
{
    string returnStr = "";
    if (bytes != null)
    {
        for (int i = 0; i < bytes.Length; i++)
        {
            returnStr += bytes[i].ToString("X2");
        }
    }
    return returnStr;
}

private void Form1_Load(object sender, EventArgs e)
{
    serialPort1.PortName = "COM1";
    serialPort1.BaudRate = 9600;
    serialPort1.DataBits = 8; //數據位
    serialPort1.Parity = System.IO.Ports.Parity.None; //無奇偶校驗位
    serialPort1.StopBits = System.IO.Ports.StopBits.One; //一個停止位
    serialPort1.ReadBufferSize = 1024; //接收緩沖區大小
    serialPort1.Encoding = Encoding.BigEndianUnicode;
    serialPort1.Open();
}

摘自 brian0031的專欄