C#中使用SerialPort类实现简单串口编程

C#中使用SerialPort类实现简单串口编程 .NET提供了SerialPort类进行串口通信,使用很简单,连我这个.NET新手也能很快上手.以下是从网上找到并自己修改后的参考代码: 1using System; 2using System.Collections.Generic; 3using System.Linq;聚酯纤维吸音板 4using System.Text; 5using System.Windows;/ 6using System.Windows.Controls; 7using System.Windows.Data; 8using System.Windows.Documents; 9using System.Windows.Input; 10using System.Windows.Media; 11using System.Windows.Media.Imaging; 12using System.Windows.Navigation; 13using System.Windows.Shapes; 14using System.IO.Ports; 15 16namespace CsharpComm 17 18 / 19 / Window1.xaml 的交互逻辑 20 / 21 public partial class Window1 : Window 22 23 public Window1() 24 25 InitializeComponent(); 26 27 28 /定义 SerialPort对象 29 SerialPort port1; 30 31 /初始化SerialPort对象方法.PortName为COM口名称,例如COM1,COM2等,注意是string类型 32 public void InitCOM(string PortName) 33 34 port1= new SerialPort(PortName); 35 port1.BaudRate= 9600;/波特率 36 port1.Parity= Parity.None;/无奇偶校验位 37 port1.StopBits= StopBits.Two;/两个停止位 38 port1.Handshake= Handshake.RequestToSend;/控制协议 39 port1.ReceivedBytesThreshold= 4;/设置 DataReceived 事件发生前内部输入缓冲区中的字节数 40 port1.DataReceived+= new SerialDataReceivedEventHandler(port1_DataReceived);/DataReceived事件委托 41 42 43 /DataReceived事件委托方法 44 private void port1_DataReceived(object sender, SerialDataReceivedEventArgs e) 45 46 try 47 48 StringBuilder currentline= new StringBuilder(); 49 /循环接收数据 50 while (port1.BytesToRead 0) 51 52 char ch= (char)port1.ReadByte(); 53 currentline.Append(ch); 54 55 /在这里对接收到的数据进行处理 56 / 57 currentline= new StringBuilder(); 58 59 catch(Exception ex) 60 61 Console.WriteLine(ex.Message.ToString(); 62 63 64 65 66 /打开串口的方法 67 public void OpenPort() 68 69 try 70 71 port1.Open(); 72 73 catch 74 if (port1.IsOpen) 75 76 Console.WriteLine(the port is opened!); 77 78 else 79 80 Console.WriteLine(failure to open the port!); 81 82 83 84 /关闭串口的方法 85 public void ClosePort() 86 87 port1.Close(); 88 if (!port1.IsOpen) 89 90 Console.WriteLine(the port is already closed!); 91 92 93 94 /向串口发送数据 95 public void SendCommand(string CommandString) 96 97 byte WriteBuffer= Encoding.ASCII.GetBytes(CommandString); 98 port1.Write(WriteBuffer,0, WriteBuffer.Length); 99 100 101 /调用实例102 private void btnOpen_Click(object sender, RoutedEventArgs e)103 104 /我现在用的COM1端口,按需要可改成COM2,COM3105 InitCOM(COM1);106 OpenPort();107 108 109Code值得注意的是:1. port1.ReceivedBytesThreshold = 4; ReceivedBytesThreshold属性设置触发一次DataReceived事件时将接收到的数据字节数.由于我的硬件是一次发上来4个字节估设置为4.如果不能正确设置这个属性的话,在SerialPort对象第一次触发DataReceived事件时还是正确的(4个字节),但是从第二次触发之后都是一个字节触发一次DataReceived事件.为什么这样搞不清楚.2.如果在 DataReceived 委托事件中使用了不是DataReceived委托事件所在线程创建的UI控件,函数等,需要使用到Dispatcher 类来达到线程安全,不然会报错.以下是MSDN中Dispatcher类的例子(XAML),简单明了: 1private delegate void AddTextDelegate(Panel p, String text); 2 3private void AddText(Panel p, String text) 4 5 p.Children.Clear(); 6 p.Children.Add(new TextBlock Text= text ); 7 8 9private void TestBeginInvokeWithParameters(Panel p)10