c# CS结构 如何取得COM口装备
问题描述：现在需要在窗口打开时能获取到当前机器的COM口信息。比如打开状态等等 --------------------编程问答-------------------- 这个情况你最好先用串口调试助手来看了再选择串口几是好的 --------------------编程问答-------------------- 利用以下的方面返回本地串口信息,再进行循打开,如打开失败的记录下来,最终返回.打开失败:只是可以断定他目前不可连接.
#region 调用注册表返回本地串口--------------------编程问答-------------------- private System.IO.Ports.SerialPort serialPort1;//使用c#的SerialPort类
/// <summary>
/// 串口函数(方法需调用注册表,串口编程所用类)
/// </summary>
/// 使用命名空间：
/// using System.Security;
/// using System.Security.Permissions;
/// <returns>返回此计算机串口数组</returns>
public static string[] GetPortNames()//
{
RegistryKey localMachine = null;
RegistryKey key2 = null;
string[] textArray = null;//这里有个判断，判断该注册表项是否存在
new RegistryPermission(RegistryPermissionAccess.Read, @"HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM").Assert();
try
{
localMachine = Registry.LocalMachine;
key2 = localMachine.OpenSubKey(@"HARDWARE\DEVICEMAP\SERIALCOMM", false);
if (key2 != null)
{
string[] valueNames = key2.GetValueNames();
textArray = new string[valueNames.Length];
for (int i = 0; i < valueNames.Length; i++)
{
textArray[i] = (string)key2.GetValue(valueNames[i]);
}
}
}
finally
{
if (localMachine != null)
{
localMachine.Close();
} if (key2 != null)
{
key2.Close();
}
CodeAccessPermission.RevertAssert();
} if (textArray == null)
{
textArray = new string[0];
}
return textArray;
}
#endregion
//设置serialPort1的串口属性
serialPort1.PortName = cmbPortName.Text;//比如cmbPortName.Text="com1"
serialPort1.BaudRate = int.Parse(cmbBaudRate.Text);//设置波特率
serialPort1.DataBits = int.Parse(cmbDataBits.Text);//设置数据位
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cmbStopBits.Text);//停止位
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), cmbParity.Text);//校验位
//打开串口
serialPort1.Open();
//关闭串口
serialPort1.Close();
--------------------编程问答-------------------- C#中关于串口的监听，你参考一下吧！
--------------------编程问答-------------------- mark
using System;
using System.IO.Ports;
using System.Threading;
using System.Text;
namespace Tangxu.Common
{
public class ReadCom
{
public ReadCom()
{
_ReadConfig = new ReadConfigure(System.Environment.CurrentDirectory + "\\Com_Info.xml");
}
public ReadCom(string sCom,int nBaud):this()
{
}
private byte[] _ReadBuffer;
private SerialPort ss_port = new SerialPort();
private static int nReadCount = 0;
private ReadConfigure _ReadConfig;
#region Initialize com port
public bool InitCom()//初始化建串口类实例
{
// return true;
try
{
ss_port.PortName = _ReadConfig.GetNodeValue("PORT");// _sComPort;
ss_port.BaudRate = int.Parse(_ReadConfig.GetNodeValue("BAUD"));//_nBaud;
ss_port.ReadBufferSize = 10240;
ss_port.DataBits = int.Parse(_ReadConfig.GetNodeValue("DATA"));//8;
switch (_ReadConfig.GetNodeValue("PARITY"))
{
case "None":
ss_port.Parity = Parity.None;
break;
case "Even":
ss_port.Parity = Parity.Even;
break;
case "Mark":
ss_port.Parity = Parity.Mark;
break;
case "Odd":
ss_port.Parity = Parity.Odd;
break;
case "Space":
ss_port.Parity = Parity.Mark;
break;
}
switch (_ReadConfig.GetNodeValue("STOP"))
{
case "1":
ss_port.StopBits = StopBits.One;
break;
case "1.5":
ss_port.StopBits = StopBits.OnePointFive;
break;
case "2":
ss_port.StopBits = StopBits.Two;
break;
}
ss_port.ReadTimeout = 600;
ss_port.WriteTimeout = 700;
ss_port.Open();//打开串口
return true;
}
catch (Exception ex)
{
throw new Exception("打开串口失败!\r\n错误信息:" + ex.Message);
}
}
#endregion
#region FreeDrv
/// <summary>
/// free opw
/// </summary>
public void FreeDrv()
{
try
{
if (ss_port != null)
{
ss_port.Close();
}
}
catch
{ }
}
#endregion
#region Write command to OPW
/// <summary>
/// 发操作命令给OPW设备
/// 并返回状态
/// </summary>
/// <param name="sCommand"> </param>
/// <returns> </returns>
public string WriteCommand(string sCommand)
{
StringBuilder sb = new StringBuilder();
bool bRead = true;
try
{
ss_port.DiscardInBuffer();
ss_port.Write(sCommand);
Thread.Sleep(1500);
while (bRead)
{
_ReadBuffer = new byte[ss_port.BytesToRead];
ss_port.Read(_ReadBuffer, 0, _ReadBuffer.Length);
sb.Append(Encoding.ASCII.GetString(_ReadBuffer));
Thread.Sleep(500);
if (ss_port.BytesToRead <= 0)
{
bRead= false;
}
}
if (sb.ToString().Length== 0)
{
nReadCount++;
}
if (nReadCount == 3)
{
nReadCount = 0;
throw new Exception("设置不正确或没有联接设备!");
}
}
catch (Exception ex)
{
throw new Exception("从设备获取数据失败!\r\n错误信息:" + ex.Message);
}
return sb.ToString(); ;
}
public string WriteCommand(byte[] bCommand)
{
StringBuilder sb = new StringBuilder();
bool bRead = true;
try
{
ss_port.DiscardInBuffer();
ss_port.Write(bCommand,0,bCommand.Length);
Thread.Sleep(1500);
while (bRead)
{
_ReadBuffer = new byte[ss_port.BytesToRead];
ss_port.Read(_ReadBuffer, 0, _ReadBuffer.Length);
sb.Append(Encoding.ASCII.GetString(_ReadBuffer));
Thread.Sleep(500);
if (ss_port.BytesToRead <= 0)
{
bRead = false;
}
}
if (sb.ToString().Length == 0)
{
nReadCount++;
}
if (nReadCount == 3)
{
nReadCount = 0;
throw new Exception("设置不正确或没有联接设备!");
}
}
catch (Exception ex)
{
throw new Exception("从设备获取数据失败!\r\n错误信息:" + ex.Message);
}
return sb.ToString();
}
#endregion
#region Get All COM Port
public string[] GetAllComPort()
{
string[] sAllPort = null;
try
{
sAllPort = SerialPort.GetPortNames();
}
catch (Exception ex)
{
throw new Exception("获取计算机COM口列表失败!\r\n错误信息:" + ex.Message);
}
return sAllPort;
}
#endregion
}
}
补充：.NET技术 , C#
