SerialPort类的用法与示例

string[] portList = System.IO.Ports.SerialPort.GetPortNames();
for (int i = 0; i < portList.Length; i++)
{
    string name = portList[i];
    comboBox.Items.Add(name);
}

/// <summary>
/// 枚举win32 api
/// </summary>
public enum HardwareEnum
{
    // 硬件
    Win32_Processor, // CPU 处理器
    Win32_PhysicalMemory, // 物理内存条
    Win32_Keyboard, // 键盘
    Win32_PointingDevice, // 点输入设备，包括鼠标。
    Win32_FloppyDrive, // 软盘驱动器
    Win32_DiskDrive, // 硬盘驱动器
    Win32_CDROMDrive, // 光盘驱动器
    Win32_BaseBoard, // 主板
    Win32_BIOS, // BIOS 芯片
    Win32_ParallelPort, // 并口
    Win32_SerialPort, // 串口
    Win32_SerialPortConfiguration, // 串口配置
    Win32_SoundDevice, // 多媒体设置，一般指声卡。
    Win32_SystemSlot, // 主板插槽 (ISA & PCI & AGP)
    Win32_USBController, // USB 控制器
    Win32_NetworkAdapter, // 网络适配器
    Win32_NetworkAdapterConfiguration, // 网络适配器设置
    Win32_Printer, // 打印机
    Win32_PrinterConfiguration, // 打印机设置
    Win32_PrintJob, // 打印机任务
    Win32_TCPIPPrinterPort, // 打印机端口
    Win32_POTSModem, // MODEM
    Win32_POTSModemToSerialPort, // MODEM 端口
    Win32_DesktopMonitor, // 显示器
    Win32_DisplayConfiguration, // 显卡
    Win32_DisplayControllerConfiguration, // 显卡设置
    Win32_VideoController, // 显卡细节。
    Win32_VideoSettings, // 显卡支持的显示模式。

    // 操作系统
    Win32_TimeZone, // 时区
    Win32_SystemDriver, // 驱动程序
    Win32_DiskPartition, // 磁盘分区
    Win32_LogicalDisk, // 逻辑磁盘
    Win32_LogicalDiskToPartition, // 逻辑磁盘所在分区及始末位置。
    Win32_LogicalMemoryConfiguration, // 逻辑内存配置
    Win32_PageFile, // 系统页文件信息
    Win32_PageFileSetting, // 页文件设置
    Win32_BootConfiguration, // 系统启动配置
    Win32_ComputerSystem, // 计算机信息简要
    Win32_OperatingSystem, // 操作系统信息
    Win32_StartupCommand, // 系统自动启动程序
    Win32_Service, // 系统安装的服务
    Win32_Group, // 系统管理组
    Win32_GroupUser, // 系统组帐号
    Win32_UserAccount, // 用户帐号
    Win32_Process, // 系统进程
    Win32_Thread, // 系统线程
    Win32_Share, // 共享
    Win32_NetworkClient, // 已安装的网络客户端
    Win32_NetworkProtocol, // 已安装的网络协议
    Win32_PnPEntity,//all device
}

/// <summary>
/// WMI取硬件信息
/// </summary>
/// <param name="hardType"></param>
/// <param name="propKey"></param>
/// <returns></returns>
public static string[] MulGetHardwareInfo(HardwareEnum hardType, string propKey)
{
    List<string> strs = new List<string>();
    try
    {
        using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("select * from " + hardType))
        {
            var hardInfos = searcher.Get();
            foreach (var hardInfo in hardInfos)
            {
                if (hardInfo.Properties[propKey].Value.ToString().Contains("COM"))
                {
                    strs.Add(hardInfo.Properties[propKey].Value.ToString());
                }
            }
            searcher.Dispose();
        }
        return strs.ToArray();
    }
    catch
    {
        return null;
    }
    finally
    { strs = null; }
}

//通过WMI获取COM端口
string[] portList = MulGetHardwareInfo(HardwareEnum.Win32_PnPEntity, "Name");

SerialPort mySerialPort = new SerialPort("COM2");
mySerialPort.BaudRate = 9600;
mySerialPort.Parity=Parity.None;
mySerialPort.StopBits = StopBits.One;
mySerialPort.DataBits = 8;
mySerialPort.Handshake = Handshake.Non;

mySerialPort.DataReceived += new SerialDataReceivedEvenHandler(DataReceive_Method);

mySerialPort.Open();

using System.IO.Ports;

private static void SendSampleData()
{
    // Instantiate the communications
    // port with some basic settings
    SerialPort port = new SerialPort(
        "COM1", 9600, Parity.None, 8, StopBits.One);

    // Open the port for communications
    port.Open();

    // Write a string
    port.Write("Hello World");

    // Write a set of bytes
    port.Write(new byte[] { 0x0A, 0xE2, 0xFF }, 0, 3);

    // Close the port
    port.Close();
}

private static void SendTextFile(SerialPort port, string FileName)
{
    port.Write(File.OpenText(FileName).ReadToEnd());
}

private static void SendBinaryFile(SerialPort port, string FileName)
{
    using (FileStream fs = File.OpenRead(FileName))
        port.Write((new BinaryReader(fs)).ReadBytes((int)fs.Length), 0, (int)fs.Length);
}

#region Namespace Inclusions
using System;
using System.IO.Ports;
using System.Windows.Forms;
#endregion

namespace SerialPortExample
{
    class SerialPortProgram
    {
        // Create the serial port with basic settings
        private SerialPort port = new SerialPort("COM1",
          9600, Parity.None, 8, StopBits.One);

        [STAThread]
        static void Main(string[] args)
        {
            // Instatiate this class
            new SerialPortProgram();
        }

        private SerialPortProgram()
        {
            Console.WriteLine("Incoming Data:");

            // Attach a method to be called when there
            // is data waiting in the port‘s buffer
            port.DataReceived += new
              SerialDataReceivedEventHandler(port_DataReceived);

            // Begin communications
            port.Open();

            // Enter an application loop to keep this thread alive
            Application.Run();
        }

        private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            // Show all the incoming data in the port‘s buffer
            Console.WriteLine(port.ReadExisting());
        }
    }
}

using System;
using System.IO.Ports;
using System.Collections.Generic;

namespace SerialComBuffering
{
    class Program
    {
        SerialPort com = new SerialPort(SerialPort.GetPortNames()[0],
          9600, Parity.None, 8, StopBits.One);

        List<byte> bBuffer = new List<byte>();
        string sBuffer = String.Empty;

        static void Main(string[] args)
        { new Program(); }

        Program()
        {
            com.DataReceived += new SerialDataReceivedEventHandler(com_DataReceived);

            com.Open();

            Console.WriteLine("Waiting for incoming data...");

            Console.ReadKey();
        }

        void com_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            // Use either the binary OR the string technique (but not both)
            // Buffer and process binary data
            while (com.BytesToRead > 0)
                bBuffer.Add((byte)com.ReadByte());
            ProcessBuffer(bBuffer);

            // Buffer string data
            sBuffer += com.ReadExisting();
            ProcessBuffer(sBuffer);
        }

        private void ProcessBuffer(string sBuffer)
        {
            // Look in the string for useful information
            // then remove the useful data from the buffer
        }

        private void ProcessBuffer(List<byte> bBuffer)
        {
            // Look in the byte array for useful information
            // then remove the useful data from the buffer
        }
    }
}