Winform 串口通讯之读卡器

 1             //实例化
 2             SerialPort Myport = new SerialPort();
 3             //设置串口端口
 4             Myport.PortName = cbxPortName.Text;
 5             //设置比特率
 6             Myport.BaudRate = Convert.ToInt32(cmbbaud.Text);
 7             //设置数据位
 8             Myport.DataBits = Convert.ToInt32(cmbBits.Text);
 9             //根据选择的数据，设置停止位
10             //if (cmbStop.SelectedIndex == 0)
11             //    Myport.StopBits = StopBits.None;
12             if (cmbStop.SelectedIndex == 1)
13                 Myport.StopBits = StopBits.One;
14             if (cmbStop.SelectedIndex == 2)
15                 Myport.StopBits = StopBits.OnePointFive;
16             if (cmbStop.SelectedIndex == 3)
17                 Myport.StopBits = StopBits.Two;
18 
19             //根据选择的数据，设置奇偶校验位
20             if (cmbParity.SelectedIndex == 0)
21                 Myport.Parity = Parity.Even;
22             if (cmbParity.SelectedIndex == 1)
23                 Myport.Parity = Parity.Mark;
24             if (cmbParity.SelectedIndex == 2)
25                 Myport.Parity = Parity.None;
26             if (cmbParity.SelectedIndex == 3)
27                 Myport.Parity = Parity.Odd;
28             if (cmbParity.SelectedIndex == 4)
29                 Myport.Parity = Parity.Space;
30 
31             //此委托应该是异步获取数据的触发事件，即是：当有串口有数据传过来时触发
32             Myport.DataReceived += new SerialDataReceivedEventHandler(port1_DataReceived);//DataReceived事件委托
33             //打开串口的方法
34             try
35             {
36                 Myport.Open();
37                 if (Myport.IsOpen)
38                 {
39                     MessageBox.Show("串口已打开");
40                 }
41                 else
42                 {
43                     MessageBox.Show("串口未能打开");
44                 }
45             }
46             catch (Exception ex)
47             {
48                 MessageBox.Show("串口未能打开"+ex.ToString());
49             }

 1  private void port1_DataReceived(object sender, SerialDataReceivedEventArgs e)
 2         {
 3             try
 4             {
 5                 string currentline = "";
 6                 //循环接收串口中的数据
 7                 while (Myport.BytesToRead > 0)
 8                 {
 9                     char ch = (char)Myport.ReadByte();
10                     currentline += ch.ToString();
11                 }
12                 //在这里对接收到的数据进行显示
13                 //如果不在窗体加载的事件里写上：Form.CheckForIllegalCrossThreadCalls = false; 就会报错）
14                 this.txtReceive.Text = currentline;
15             }
16             catch (Exception ex)
17             {
18                 Console.WriteLine(ex.Message.ToString());
19             }
20         }