using System;
using System.Collections.Generic;
using System.Text;
using System.IO.Ports;
using System.Threading;namespace RequestResponse001CS
{// 拨号器管理者public class ModemManager{//已经安装了拨号器的串口对象private List<Modem> modemCollection = null;// ModemCollection 的调度编号private int modemNumber = -1;//当前有无可使用的串口拨号器private bool hasEnabled = false;//串口拨号器的重新检测间隔分钟private int reCheckMinutes = 30; //默认30分钟//波特率配置列表private Dictionary<string, int> boudrateCollection = null;//获得当前时间private DateTime checkDateTime = DateTime.Now;private ManagerCallback m_callBack = null; //返回委托事件#region 委托public delegate void ManagerCallback(String message);//委托返回信息private void ReturnMessage(String message){if (message.Length > 0 && m_callBack != null){m_callBack(message);}}#endregion#region 属性public List<Modem> ModemCollection{get { return modemCollection; }}//可使用的拨号器个数public int EnabledCount{get{if (modemCollection == null) return 0;else return modemCollection.Count;}}public bool HasEnabled{get { return hasEnabled; }//set { hasPort = value; }}//波特率配置列表public Dictionary<string, int> BoudrateCollection{get { return boudrateCollection; }set { boudrateCollection = value; }}//串口拨号器的重新检测间隔分钟public int ReCheckMinutes{get { return reCheckMinutes; }set { reCheckMinutes = value; }}#endregion#region  构造方法public ModemManager(ManagerCallback callBack) {if (callBack != null) m_callBack = callBack;}public ModemManager(int reCheckMinutes, ManagerCallback callBack){this.ReCheckMinutes = reCheckMinutes;if (callBack != null) m_callBack = callBack;}public ModemManager(Dictionary<string, int> boudrateCollection, ManagerCallback callBack){this.BoudrateCollection = boudrateCollection;if (callBack != null) m_callBack = callBack;}public ModemManager(Dictionary<string, int> boudrateCollection, int reCheckMinutes,ManagerCallback callBack){this.BoudrateCollection = boudrateCollection;this.ReCheckMinutes = reCheckMinutes;if (callBack != null) m_callBack = callBack;}#endregion  构造方法#region  调度方法/// <summary>/// 调用拨号器/// </summary>/// <param name="cardNumber"></param>public void ModemInvoking(string cardNumber){if (hasEnabled == false){// 获得串口上已经安装了拨号器的对象this.GetModemCollection();}if (hasEnabled == true){this.ModemCalling(cardNumber);}//定期检测串口列表if (checkDateTime.AddMinutes(ReCheckMinutes) <= DateTime.Now){// 重新获得串口上已经安装了拨号器的对象this.GetModemCollection();checkDateTime = DateTime.Now;}}/// <summary>/// 获得串口上安装了拨号器的对象/// </summary>public void GetModemCollection(){if (modemCollection == null){modemCollection = new List<Modem>();}int modemCollectionCount = modemCollection.Count;//步骤一： 重新获得所有的串口名称(列表)string[] portNames = SerialPort.GetPortNames();//如果当前串口数目 > 正在使用的COMif (portNames.Length > modemCollectionCount){ReturnMessage("正在检测可以使用的拨号器..."); //测试使用foreach (string portName in portNames){//当前串口名是否存在拨号列表中bool existModem = false;if (modemCollectionCount > 0){existModem = modemCollection.Exists(delegate(Modem myModem){return portName == myModem.PortName;});}//如果当前串口名不存在拨号列表中，则重新检测！if (!existModem){ReturnMessage("正在检测：" + portName); //测试使用AddModemToCollection(portName);}}}// 判断当前计算机有无可使用串口端hasEnabled = modemCollection.Count <= 0 ? false : true;}/// <summary>/// 对拨号器的调度使用/// </summary>private void ModemCalling(string cardNumber){if (modemCollection == null) return;// 等待线程进入 Monitor.Enter(modemCollection);Modem modem = null;try{//获得当前调用的串口对象的索引号int number = GetModemNumber();if (number >= 0) //判断是否存在拨号器{modem = modemCollection[number];if (modem != null) // && !modem.IsWorking){ReturnMessage(string.Format("{0} 正在对 SIM卡：{1} 进行拨号...", modem.PortName,cardNumber)); modem.DialingNumberToModem(cardNumber); //对 SIM 进行拨号，唤醒上位机}}else{ReturnMessage("没有可使用的拨号器，重新对端口进行检测...");this.GetModemCollection();}}catch{//再一次检查该 COM 能否使用！ (范工提议)if (modem != null){string portName = modem.PortName;modemCollection.Remove(modem); //从可用列表去除modem.CloseModem();AddModemToCollection(portName);}}finally{if (modemCollection != null){// 通知其它对象Monitor.Pulse(modemCollection);// 释放对象锁 Monitor.Exit(modemCollection);}}}/// <summary>/// 获得对 ModemCollection 的调度编号/// </summary>/// <returns></returns>private int GetModemNumber(){lock (this){if (modemNumber + 1 >= modemCollection.Count){if (modemCollection.Count == 0) modemNumber = -1;else modemNumber = 0;}else{modemNumber++;}return modemNumber;}}/// <summary>/// 添加 Modem 到 modemCollection/// </summary>private void AddModemToCollection(string portName){Modem myModem = null;//是否设置波特率？if (boudrateCollection != null&& boudrateCollection.ContainsKey(portName)&& boudrateCollection[portName] != 0){myModem = new Modem(portName, boudrateCollection[portName], ReturnMessage);}else{myModem = new Modem(portName, ReturnMessage);}bool hasModem = myModem.CheckPortExistModem();if (hasModem){modemCollection.Add(myModem);}else{myModem.CloseModem();myModem = null;}}/// <summary>/// 释放所有的串口资源/// </summary>public void CloseModemCollection(){if (modemCollection != null){for (int i = 0; i < modemCollection.Count; i++){modemCollection[i].CloseModem();modemCollection[i] = null;}modemCollection = null;}if (boudrateCollection != null){boudrateCollection = null;}}#endregion}
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;namespace RequestResponse001CS
{public partial class FormModemManager : Form{public FormModemManager(){InitializeComponent();}ModemManager ModemManager;Thread thread;private void FormModemManager_Load(object sender, EventArgs e){ModemManager = new ModemManager(5, TakeControl);}public void TakeControl(string message){if (this.InvokeRequired){Modem.SetCallback d = new Modem.SetCallback(TakeControl);this.Invoke(d, new object[] { message });}else{//MessageBox.Show(message);this.txtMessageShow.Text = this.txtMessageShow.Text + message + "\r\n" ;this.txtMessageShow.Select(this.txtMessageShow.Text.Length, 0);this.txtMessageShow.ScrollToCaret(); }}private void FormModemManager_FormClosing(object sender, FormClosingEventArgs e){if (thread != null){thread.Abort();}}private void Button_Run_Click(object sender, EventArgs e){thread = new Thread(new ThreadStart(Run));thread.Start();}private void Run(){try{// 获得串口上已经安装了拨号器的对象ModemManager.GetModemCollection();if (ModemManager.HasEnabled == false){TakeControl("当前计算机无可使用的串口拨号器！");}else{TakeControl("当前计算机可使用的拨号器如下：");List<Modem> modemCollection = ModemManager.ModemCollection;for (int i = 0; i < modemCollection.Count; i++){Modem modem = modemCollection[i];TakeControl(string.Format("端口名：{0}，波特率：{1}",modem.PortName, modem.Boudrate.ToString()));}}while (ModemManager.HasEnabled){// 调用拨号器if (string.IsNullOrEmpty(txtCardNumber.Text.Trim())){ModemManager.ModemInvoking("135xxxxxxxx"); // SIM 卡号}else ModemManager.ModemInvoking(txtCardNumber.Text.Trim());Thread.Sleep(5000);}TakeControl("程序运行结束！");}finally{// 释放所有串口资源组件ModemManager.CloseModemCollection();}}//运行停止private void Button_Stop_Click(object sender, EventArgs e){if (ModemManager != null){ModemManager.CloseModemCollection();}}}
}

本文转自钢钢博客园博客，原文链接：http://www.cnblogs.com/xugang/archive/2013/05/13/3075992.html，如需转载请自行联系原作者