1 serialPort1.PortName = commcomboBox1.Text;
2 serialPort1.BaudRate = int.Parse(baudcomboBox2.Text);
3 serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), efficacycomboBox3.Text);
4 serialPort1.DataBits = int.Parse(databitcomboBox4.Text);
5 serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), stopbitcomboBox5.Text);

 1 /*前面为串口基础信息的配置，这里为打开串口*/
 2 if (!serialPort1.IsOpen)
 3 {
 4      try
 5      {
 6           serialPort1.Open();
 7       }
 8       catch (Exception)
 9       {
10             MessageBox.Show("Port Access is failure，Reset The Serial Basic Information", "Prompting");
11        }  
12 }

1 /*发送字符串str的格式就需要根据具体的串口设备协议来定*/
2 string str = "";
3 serialPort1.Write(str);
4 byte[] sendByte = Encoding.BigEndianUnicode.GetBytes(str.ToCharArray());
5 serialPort1.Write(sendByte, 0, sendByte.Length);