利用WCF的双工通讯实现一个简单的心跳监控系统 z

利用WCF的双工通讯实现一个简单的心跳监控系统

http://www.cnblogs.com/zuowj/p/5761011.html

何为心跳监控系统？

故名思义，就是监控某个或某些个程序的运行状态，就好比医院里面的心跳监视仪一样，能够随时显示病人的心跳情况。

心跳监控的目的是什么？

与医院里面的心跳监视仪目的类似，监控程序运行状态，一旦出现问题（比如：一些自动运行的服务、程序等突然停止运行了），那么心跳监控系统就能“感 知到”并及时的显示在监控界面上，同时可以通过微信、短信告之相关的人员，以便他们及时处理程序异常，从而避免一些自动运行的服务、程序等突然停止运行而 造成的一系列损失

心跳监控系统实现的思路是怎样的？

核心技术：WCF的双工通讯

实现步骤：

1.定义WCF的服务契约接口以及回调接口，服务方法主要包括：Start（被监控的程序启动时调用，即通知监控系统，我已经启动了）、 Stop（被监控的程序停止时调用，即通知监控系统，我已经停止了）、ReportRunning（被监控的程序运行中定时调用，即通知监控系统，我是正 常的并在运行中，同时还起到检测监控系统是否在运行的一个功能，一举两得），回调服务方法应有：Listen（这个是给监控系统主动去定时回调被监控的程 序（心跳），如果被监控的程序能正常的返回状态，那么就是正常的，否则有可能已经“死了”，这时监控系统就需要按照预设指令作出相应的操作，比如：监控主 界面显示异常的程序，同时发送异常通知消息给相关人员）

2.建立一个心跳监控系统Winform项目，并实现WCF服务，即集成实现WCF服务宿主程序，同时每一个WCF服务方法均需关联界面，即：程序启动了、停止了、运行中均会在界面实时显示出来或做一些实时统计；

3.其它被监控的程序（指自动运行的服务、程序等）需要集成实现WCF回调接口及开启WCF服务通讯的功能；

心跳监控系统的运行顺序是怎样的？如何保证监控方与被监控方实时不间断通讯？

运行顺序：

1.开启心跳监控系统（即：同时开启WCF服务宿主程序），确保监控服务正常运行；

2.开启其它被监控的程序，确保开启客户端与监控系统的WCF双工通讯服务正常；

注意：一定要先开启心跳监控系统，否则其它被监控的程序因无法与监控系统的WCF双工通讯服务正常连接而报错或多次尝试重连；

保证监控方与被监控方实时不间断通讯：

在保证按照上面所说的运行顺序依次开启心跳监控系统，再开启其它被监控的程序，正常建立一次通讯后，后续只要任何一方出现通讯中断，均会自动尝试重连（主要是客户端重连，心跳监控系统除非停止运行，否则不会中断，若因停止运行造成双方通讯中断，只需重启心跳监控系统即可）

通讯模式：

推模式：被监控的程序通过主动的调用WCF服务方法：Start、Stop、ReportRunning 向心跳监控系统告之运行状态，若通讯失败，则自动尝试重连，直至连接成功；

拉模式：心跳监控系统主动回调Listen方法，向被监控的程序索取运行状态，若通讯失败，则会在指定时间内多次重试回调客户端，若客户端在规定的时间范围内仍无法返回消息，则视为客户端异常，那么心跳监控系统则会进行异常的处理；

实现源代码：

ProgramMonitor.Core 类库项目：主要是定义WCF服务的相关接口以及实现回调的接口（因为每个客户端都需实现一遍回调接口，故统一实现，客户端集成后直接可以用，简化集成客户端的开发成本），心跳监控系统及需要被监控的程序均需要依赖该DLL；

ProgramMonitor WINFORM项目：心跳监控系统

整个解决方案如下图示：

注：由于源代码相对较多，故不再一一说明，只对重点的代码作解释

ProgramMonitor.Core

IListenService：（心跳监控WCF服务契约接口）

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel;   namespace ProgramMonitor.Core {     [ServiceContract(Namespace = "http://www.zuowenjun.cn", SessionMode = SessionMode.Required, CallbackContract = typeof(IListenCall))]     public interface IListenService     {         [OperationContract(IsOneWay = true)]         void Start(ProgramInfo programInfo);           [OperationContract(IsOneWay = true)]         void Stop(string programId);           [OperationContract(IsOneWay = true)]         void ReportRunning(ProgramInfo programInfo);     } }

IListenCall：（监听回调服务接口，主用被心跳监控系统调用）

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using System; using System.Collections.Generic; using System.Linq; using System.ServiceModel; using System.Text;   namespace ProgramMonitor.Core {     public interface IListenCall     {         [OperationContract]         int Listen(string programId);     } }

ProgramInfo：（程序信息类，主要用于获取被监控程序的基本信息）

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel; using System.Runtime.Serialization;   namespace ProgramMonitor.Core {     [DataContract(Namespace = "http://www.zuowenjun.cn")]     public class ProgramInfo     {         public ProgramInfo()         {         }           [DataMember]         public string Id { get; internal set; }           [DataMember]         public string Name { get; set; }           [DataMember]         public string Version { get; set; }           [DataMember]         public string InstalledLocation { get; set; }           [DataMember]         public string Description { get; set; }             private int runState = -1;         /// <summary>         /// 运行状态，-1:表示停止，0表示启动，1表示运行中         /// </summary>         [DataMember]         public int RunState         {             get             {                 return runState;             }             set             {                 this.UpdateStateTime = DateTime.Now;                 if (value < 0)                 {                     runState = -1;                     this.StopTime = this.UpdateStateTime;                 }                 else if (value == 0)                 {                     runState = 0;                     this.StartTime = this.UpdateStateTime;                 }                 else                 {                     runState = 1;                 }             }         }           [DataMember]         public DateTime UpdateStateTime { get; private set; }           [DataMember]         public DateTime StartTime { get; private set; }           [DataMember]         public DateTime StopTime { get; private set; }     } }

 ListenClient：（监听客户端类，实现WCF回调服务接口，主要用于被监控的程序）

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using System; using System.Collections.Generic; using System.Diagnostics; using System.IO; using System.Linq; using System.Security.Cryptography; using System.ServiceModel; using System.ServiceModel.Description; using System.Text;   namespace ProgramMonitor.Core {     public class ListenClient : IListenCall     {         private static object syncObject = new object();         private static ListenClient instance = null;           private ProgramInfo programInfo = null;         private string serviceHostAddr = null;         private int autoReportRunningInterval = 300;           private DuplexChannelFactory<IListenService> listenServiceFactory = null;         private IListenService proxyListenService = null;         private System.Timers.Timer reportRunningTimer = null;           private ListenClient(ProgramInfo programInfo, string serviceHostAddr = null, int autoReportRunningInterval = 300)         {             programInfo.Id = CreateProgramId();               this.programInfo = programInfo;             this.serviceHostAddr = serviceHostAddr;             if (autoReportRunningInterval >= 60) //最低1分钟的间隔             {                 this.autoReportRunningInterval = autoReportRunningInterval;             }             BuildAutoReportRunningTimer();         }           private void BuildAutoReportRunningTimer()         {             reportRunningTimer = new System.Timers.Timer(autoReportRunningInterval * 1000);             reportRunningTimer.Elapsed += (s, e) =>             {                 ReportRunning();             };         }           private void BuildListenClientService()         {             if (listenServiceFactory == null)             {                 if (string.IsNullOrEmpty(serviceHostAddr))                 {                     serviceHostAddr = System.Configuration.ConfigurationManager.AppSettings["ServiceHostAddr"];                 }                 InstanceContext instanceContext = new InstanceContext(instance);                 NetTcpBinding binding = new NetTcpBinding();                 binding.ReceiveTimeout = new TimeSpan(0, 5, 0);                 binding.SendTimeout = new TimeSpan(0, 5, 0);                 Uri baseAddress = new Uri(string.Format("net.tcp://{0}/ListenService", serviceHostAddr));                 listenServiceFactory = new DuplexChannelFactory<IListenService>(instanceContext, binding, new EndpointAddress(baseAddress));             }             proxyListenService = listenServiceFactory.CreateChannel();         }           public static ListenClient GetInstance(ProgramInfo programInfo, string serviceHostAddr = null, int autoReportRunningInterval = 300)         {             if (instance == null)             {                 lock (syncObject)                 {                     if (instance == null)                     {                         instance = new ListenClient(programInfo, serviceHostAddr, autoReportRunningInterval);                         instance.BuildListenClientService();                     }                 }             }             return instance;         }           public void ReportStart()         {             proxyListenService.Start(programInfo);             reportRunningTimer.Start();         }           public void ReportStop()         {             proxyListenService.Stop(programInfo.Id);             reportRunningTimer.Stop();         }           public void ReportRunning()         {             try             {                 proxyListenService.ReportRunning(programInfo);             }             catch             {                 BuildListenClientService();             }         }           int IListenCall.Listen(string programId)         {             if (programInfo.Id.Equals(programId, StringComparison.OrdinalIgnoreCase))             {                 if (programInfo.RunState >= 0)                 {                     return 1;                 }             }             return -1;         }             private string CreateProgramId()         {               Process currProcess = Process.GetCurrentProcess();             int procCount = Process.GetProcessesByName(currProcess.ProcessName).Length;             string currentProgramPath = currProcess.MainModule.FileName;             return GetMD5HashFromFile(currentProgramPath) + "_" + procCount;         }           private string GetMD5HashFromFile(string fileName)         {             try             {                 byte[] hashData = null;                 using (FileStream fs = new FileStream(fileName, System.IO.FileMode.Open, FileAccess.Read))                 {                     MD5 md5 = new MD5CryptoServiceProvider();                     hashData = md5.ComputeHash(fs);                     fs.Close();                 }                 StringBuilder sb = new StringBuilder();                 for (int i = 0; i < hashData.Length; i++)                 {                     sb.Append(hashData[i].ToString("x2"));                 }                 return sb.ToString();             }             catch (Exception ex)             {                 throw new Exception("GetMD5HashFromFile Error:" + ex.Message);             }         }       }   }

这里特别说一下：CreateProgramId方法，因为心跳监控系统主要是依据ProgramId来识别每个不同的程序，故ProgramId 非常重要，而我这里采用的是文件的 MD5值+进程数作为ProgramId，有些人可能要问，为什么要加进程数呢？原因很简单，因为有些程序是允许开启多个的实例的，如果不加进程数，那么 心跳监控系统就无法识别多个同一个程序到底是哪个。

 ProgramMonitor

ListenService：（WCF心跳监控服务接口实现类）

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using ProgramMonitor.Core; using System.ServiceModel;   namespace ProgramMonitor.Service {     [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Reentrant, InstanceContextMode = InstanceContextMode.PerCall)]     public class ListenService : IListenService     {         public void Start(ProgramInfo programInfo)         {             var listenCall = OperationContext.Current.GetCallbackChannel<IListenCall>();             Common.SaveProgramStartInfo(programInfo, listenCall);         }           public void Stop(string programId)         {             Common.SaveProgramStopInfo(programId);         }             public void ReportRunning(ProgramInfo programInfo)         {             var listenCall = OperationContext.Current.GetCallbackChannel<IListenCall>();             Common.SaveProgramRunningInfo(programInfo, listenCall);         }     } }

Common:（通用业务逻辑类，主要用于WCF与UI实时沟通与联动）

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using ProgramMonitor.Core; using System.Collections.Concurrent; using System.Timers; using System.Threading; using Timer = System.Timers.Timer; using ProgramMonitor.Service; using System.Data.SqlClient; using log4net;   namespace ProgramMonitor {     public static class Common     {         public static ConcurrentDictionary<string, ProgramInfo> ProgramInfos = null;           public static ConcurrentDictionary<string, IListenCall> ListenCalls = null;           public static ConcurrentBag<string> ManualStopProgramIds = null;           public static System.Timers.Timer loadTimer = null;           public static Timer listenTimer = null;           public static SynchronizationContext SyncContext = null;           public static Action<ProgramInfo, bool> RefreshListView;           public static Action<ProgramInfo, bool> RefreshTabControl;           public static int ClearInterval = 5;           public static int ListenInterval = 2;           public static bool Listening = false;           public static string DbConnString = null;           public static string[] NoticePhoneNos = null;           public static string NoticeWxUserIds = null;           public static ILog Logger = LogManager.GetLogger("ProgramMonitor");           public const string SqlProviderName = "System.Data.SqlClient";           public static void SaveProgramStartInfo(ProgramInfo programInfo, IListenCall listenCall)         {             programInfo.RunState = 0;             ProgramInfos.AddOrUpdate(programInfo.Id, programInfo, (key, value) => programInfo);             ListenCalls.AddOrUpdate(programInfo.Id, listenCall, (key, value) => listenCall);             RefreshListView(programInfo, false);             RefreshTabControl(programInfo, true);             WriteLog(string.Format("程序名：{0}，版本：{1}，已启动运行", programInfo.Name, programInfo.Version), false);         }           public static void SaveProgramStopInfo(string programId)         {             ProgramInfo programInfo;             if (ProgramInfos.TryGetValue(programId, out programInfo))             {                 programInfo.RunState = -1;                 RefreshListView(programInfo, false);                   IListenCall listenCall = null;                 ListenCalls.TryRemove(programId, out listenCall);                 RefreshTabControl(programInfo, true);             }             WriteLog(string.Format("程序名：{0}，版本：{1}，已停止运行", programInfo.Name, programInfo.Version), false);         }           public static void SaveProgramRunningInfo(ProgramInfo programInfo, IListenCall listenCall)         {             if (!ProgramInfos.ContainsKey(programInfo.Id) || !ListenCalls.ContainsKey(programInfo.Id))             {                 SaveProgramStartInfo(programInfo, listenCall);             }             programInfo.RunState = 1;             RefreshTabControl(programInfo, true);             WriteLog(string.Format("程序名：{0}，版本：{1}，正在运行中", programInfo.Name, programInfo.Version), false);         }           public static void AutoLoadProgramInfos()         {             if (loadTimer == null)             {                 loadTimer = new Timer(1 * 60 * 1000);                 loadTimer.Elapsed += delegate(object sender, ElapsedEventArgs e)                 {                     var timer = sender as Timer;                     try                     {                         timer.Stop();                         foreach (var item in ProgramInfos)                         {                             var programInfo = item.Value;                             RefreshListView(programInfo, false);                         }                     }                     finally                     {                         if (Listening)                         {                             timer.Start();                         }                     }                 };             }             else             {                 loadTimer.Interval = 1 * 60 * 1000;             }             loadTimer.Start();         }             public static void AutoListenPrograms()         {             if (listenTimer == null)             {                 listenTimer = new Timer(ListenInterval * 60 * 1000);                 listenTimer.Elapsed += delegate(object sender, ElapsedEventArgs e)                 {                     var timer = sender as Timer;                     try                     {                         timer.Stop();                         foreach (var item in ListenCalls)                         {                             bool needUpdateStatInfo = false;                             var listenCall = item.Value;                             var programInfo = ProgramInfos[item.Key];                             int oldRunState = programInfo.RunState;                             try                             {                                 programInfo.RunState = listenCall.Listen(programInfo.Id);                             }                             catch                             {                                 if (programInfo.RunState != -1)                                 {                                     programInfo.RunState = -1;                                     needUpdateStatInfo = true;                                 }                             }                               if (programInfo.RunState == -1 && programInfo.StopTime.AddMinutes(5) < DateTime.Now) //如果停了5分钟，则发一次短信                             {                                 SendNoticeSms(programInfo);                                 SendNoticeWeiXin(programInfo);                                 programInfo.RunState = -1;//重新刷新状态                             }                               if (oldRunState != programInfo.RunState)                             {                                 needUpdateStatInfo = true;                                 WriteLog(string.Format("程序名：{0}，版本：{1}，运行状态变更为：{2}", programInfo.Name, programInfo.Version,programInfo.RunState), false);                             }                               RefreshTabControl(programInfo, needUpdateStatInfo);                         }                     }                     finally                     {                         if (Listening)                         {                             timer.Start();                         }                     }                 };             }             else             {                 listenTimer.Interval = ListenInterval * 60 * 1000;             }               listenTimer.Start();         }           public static void SendNoticeSms(ProgramInfo programInfo)         {             if (NoticePhoneNos == null || NoticePhoneNos.Length <= 0) return;               using (DataAccess da = new DataAccess(Common.DbConnString, Common.SqlProviderName))             {                 da.UseTransaction();                 foreach (string phoneNo in NoticePhoneNos)                 {                     var parameters = da.ParameterHelper.AddParameter("@Mbno", phoneNo)                               .AddParameter("@Msg", string.Format("程序名：{0}，版本：{1}，安装路径：{2}，已停止运行了，请尽快处理！",                                             programInfo.Name, programInfo.Version, programInfo.InstalledLocation))                               .AddParameter("@SendTime", DateTime.Now)                               .AddParameter("@KndType", "监控异常通知")                               .ToParameterArray();                       da.ExecuteCommand("insert into OutBox(Mbno,Msg,SendTime,KndType) values(@Mbno,@Msg,@SendTime,@KndType)", paramObjs: parameters);                 }                 da.Commit();                 WriteLog(string.Format("程序名：{0}，版本：{1}，已停止运行超过5分钟，成功发送短信通知到：{2}",                         programInfo.Name, programInfo.Version, string.Join(",", NoticePhoneNos)), false);             }           }           public static void SendNoticeWeiXin(ProgramInfo programInfo)         {             if (string.IsNullOrEmpty(NoticeWxUserIds)) return;               string msg = string.Format("程序名：{0}，版本：{1}，安装路径：{2}，已停止运行了，请尽快处理！",                                             programInfo.Name, programInfo.Version, programInfo.InstalledLocation);             var wx = new WeChat();             var result = wx.SendMessage(NoticeWxUserIds, msg);               if (result["errmsg"].ToString().Equals("ok", StringComparison.OrdinalIgnoreCase))             {                 WriteLog(string.Format("程序名：{0}，版本：{1}，已停止运行超过5分钟，成功发送微信通知到：{2}", programInfo.Name, programInfo.Version,NoticeWxUserIds), false);             }         }           public static void BuildConnectionString(string server, string db, string uid, string pwd)         {             SqlConnectionStringBuilder connStrBuilder = new SqlConnectionStringBuilder();             connStrBuilder.DataSource = server;             connStrBuilder.InitialCatalog = db;             connStrBuilder.UserID = uid;             connStrBuilder.Password = pwd;             connStrBuilder.IntegratedSecurity = false;             connStrBuilder.ConnectTimeout = 15;               DbConnString = connStrBuilder.ToString();         }           public static void WriteLog(string msg, bool isError = false)         {             if (isError)             {                 Logger.Error(msg);             }             else             {                 Logger.Info(msg);             }         }             } }

FrmMain：（心跳监控系统窗体类）

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using ProgramMonitor.Core; using ProgramMonitor.Service; using System; using System.Collections.Concurrent; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.ServiceModel; using System.ServiceModel.Description; using System.Text; using System.Threading; using System.Windows.Forms;   namespace ProgramMonitor {     public partial class FrmMain : Form     {         private ServiceHost serviceHost = null;             public FrmMain()         {             InitializeComponent();               tabControl1.SizeMode = TabSizeMode.Fixed;             tabControl1.ItemSize = new Size(0, 1);     #if (DEBUG)             btnTestSend.Visible = true; #else             btnTestSend.Visible = false; #endif               Common.SyncContext = SynchronizationContext.Current;             Common.ProgramInfos = new ConcurrentDictionary<string, ProgramInfo>();             Common.ListenCalls = new ConcurrentDictionary<string, IListenCall>();             Common.ManualStopProgramIds = new ConcurrentBag<string>();               Common.RefreshListView = RefreshListView;             Common.RefreshTabControl = RefreshTabControl;         }           #region 自定义方法区域           private void RefreshListView(ProgramInfo programInfo, bool needUpdateStatInfo)         {             Common.SyncContext.Post(o =>             {                 string listViewItemKey = string.Format("lvItem_{0}", programInfo.Id);                 if (!listView1.Items.ContainsKey(listViewItemKey))                 {                       var lstItem = listView1.Items.Add(listViewItemKey, programInfo.Name, 0);                     lstItem.Name = listViewItemKey;                     lstItem.Tag = programInfo.Id;                     lstItem.SubItems.Add(programInfo.Version);                     lstItem.SubItems.Add(programInfo.InstalledLocation);                     lstItem.ToolTipText = programInfo.Description;                       if (needUpdateStatInfo)                     {                         UpdateProgramListenStatInfo();                     }                 }                 else                 {                       if (!Common.ListenCalls.ContainsKey(programInfo.Id) && programInfo.RunState == -1 && Common.ClearInterval > 0                         && programInfo.StopTime.AddMinutes(Common.ClearInterval) < DateTime.Now) //当属于正常关闭的程序在指定时间后从监控列表中移除                     {                         RemoveListenItem(programInfo.Id);                     }                 }             }, null);         }           private void RefreshTabControl(ProgramInfo programInfo, bool needUpdateStatInfo)         {             Common.SyncContext.Post(o =>             {                 string tabPgName = string.Format("tabpg_{0}", programInfo.Id);                 string msgCtrlName = string.Format("{0}_MsgText", tabPgName);                 if (!tabControl1.TabPages.ContainsKey(tabPgName))                 {                     RichTextBox rchTextBox = new RichTextBox();                     rchTextBox.Name = msgCtrlName;                     rchTextBox.Dock = DockStyle.Fill;                     rchTextBox.ReadOnly = true;                     AppendTextToRichTextBox(rchTextBox, programInfo);                     var tabPg = new TabPage();                     tabPg.Name = tabPgName;                     tabPg.Controls.Add(rchTextBox);                     tabControl1.TabPages.Add(tabPg);                 }                 else                 {                     var tabPg = tabControl1.TabPages[tabPgName];                     var rchTextBox = tabPg.Controls[msgCtrlName] as RichTextBox;                     AppendTextToRichTextBox(rchTextBox, programInfo);                 }                   if (needUpdateStatInfo)                 {                     UpdateProgramListenStatInfo();                 }             }, null);         }             private void UpdateProgramListenStatInfo()         {             int runCount = Common.ProgramInfos.Count(p => p.Value.RunState >= 0);             labRunCount.Text = string.Format("{0}个", runCount);             labStopCount.Text = string.Format("{0}个", Common.ProgramInfos.Count - runCount);               foreach (ListViewItem lstItem in listView1.Items)             {                 string programId = lstItem.Tag.ToString();                   if (Common.ProgramInfos[programId].RunState == -1)                 {                     lstItem.ForeColor = Color.Red;                 }                 else                 {                     lstItem.ForeColor = Color.Black;                 }             }         }           private void RemoveListenItem(string programInfoId)         {             ProgramInfo programInfo = Common.ProgramInfos[programInfoId];             listView1.Items.RemoveByKey(string.Format("lvItem_{0}", programInfo.Id));             tabControl1.TabPages.RemoveByKey(string.Format("tabpg_{0}", programInfo.Id));             Common.ProgramInfos.TryRemove(programInfo.Id, out programInfo);             IListenCall listenCall = null;             Common.ListenCalls.TryRemove(programInfoId, out listenCall);               UpdateProgramListenStatInfo();         }           private void AppendTextToRichTextBox(RichTextBox rchTextBox, Core.ProgramInfo programInfo)         {             Color msgColor = Color.Black;             string lineMsg = string.Format("{0:yyyy-MM-dd HH:mm} {1}({2}) {3} ", DateTime.Now, programInfo.Name, programInfo.Version, GetRunStateString(programInfo.RunState, out msgColor));             rchTextBox.SelectionColor = msgColor;             rchTextBox.SelectionStart = rchTextBox.Text.Length;             rchTextBox.AppendText(lineMsg);             rchTextBox.SelectionLength = rchTextBox.Text.Length;               if(rchTextBox.Lines.Length>1000)             {                              }         }           private string GetRunStateString(int runState, out Color msgColor)         {             if (runState < 0)             {                 msgColor = Color.Red;                 return "程序已停止运行";             }             else if (runState == 0)             {                 msgColor = Color.Blue;                 return "程序已启动运行";             }             else             {                 msgColor = Color.Black;                 return "程序已在运行中";             }         }             private void StartListenService()         {             if (serviceHost == null)             {                 string serviceHostAddr = System.Configuration.ConfigurationManager.AppSettings["ServiceHostAddr"];                 string serviceMetaHostAddr = System.Configuration.ConfigurationManager.AppSettings["ServiceMetaHostAddr"];                   serviceHost = new ServiceHost(typeof(ListenService));                   NetTcpBinding binding = new NetTcpBinding();                 binding.ReceiveTimeout = new TimeSpan(0, 5, 0);                 binding.SendTimeout = new TimeSpan(0, 5, 0);                 serviceHost.AddServiceEndpoint(typeof(IListenService), binding, string.Format("net.tcp://{0}/ListenService", serviceHostAddr));                 if (serviceHost.Description.Behaviors.Find<ServiceMetadataBehavior>() == null)                 {                     ServiceMetadataBehavior behavior = new ServiceMetadataBehavior();                     behavior.HttpGetEnabled = true;                     behavior.HttpGetUrl = new Uri(string.Format("http://{0}/ListenService/metadata", serviceMetaHostAddr));                     serviceHost.Description.Behaviors.Add(behavior);                 }                 serviceHost.Opened += (s, arg) =>                 {                     SetUIStyle("S");                     Common.Listening = true;                     Common.AutoLoadProgramInfos();                     Common.AutoListenPrograms();                 };                 serviceHost.Closed += (s, arg) =>                 {                     SetUIStyle("C");                     Common.loadTimer.Stop();                     Common.listenTimer.Stop();                     Common.Listening = false;                 };             }               serviceHost.Open();           }           private void StopListenService()         {             try             {                 if (serviceHost != null && serviceHost.State != CommunicationState.Closed)                 {                     serviceHost.Close();                 }                 serviceHost = null;             }             catch             { }         }           private void SetUIStyle(string state)         {             if (state == "S")             {                 labSericeState.BackColor = Color.Green;                 txtRefreshInterval.Enabled = false;                 txtListenInterval.Enabled = false;                 btnExec.Tag = "C";                 btnExec.Text = "停止监控";                 panel1.Enabled = false;                 panel2.Enabled = false;             }             else             {                 labSericeState.BackColor = Color.Red;                 txtRefreshInterval.Enabled = true;                 txtListenInterval.Enabled = true;                 btnExec.Tag = "S";                 btnExec.Text = "开启监控";                 panel1.Enabled = true;                 panel2.Enabled = true;             }           }           private void InitListViewStyle()         {             ImageList imgList = new ImageList();             imgList.ImageSize = new Size(32, 32);             imgList.Images.Add(Properties.Resources.monitor);               listView1.SmallImageList = imgList;             listView1.LargeImageList = imgList;             listView1.View = View.Details;             listView1.GridLines = false;             listView1.FullRowSelect = true;             listView1.Columns.Add("程序名称", -2);             listView1.Columns.Add("版本");             listView1.Columns.Add("运行路径");               int avgWidth = listView1.Width / 3;           }           private void InitNoticeSetting()         {               if (chkSendSms.Checked)             {                 bool dbConnected = false;                 Common.BuildConnectionString(txtServer.Text, txtDb.Text, txtUID.Text, txtPwd.Text);                 using (var da = new DataAccess(Common.DbConnString, Common.SqlProviderName))                 {                     try                     {                         da.ExecuteScalar<DateTime>("select getdate()");                         dbConnected = true;                     }                     catch (Exception ex)                     {                         MessageBox.Show("数据库测试连接失败，原因：" + ex.Message);                     }                 }                   if (dbConnected)                 {                     if (txtPhoneNos.Text.Trim().IndexOf(",") >= 0)                     {                         Common.NoticePhoneNos = txtPhoneNos.Text.Trim().Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries);                     }                     else                     {                         Common.NoticePhoneNos = new[] { txtPhoneNos.Text.Trim() };                     }                 }             }             else             {                 Common.NoticePhoneNos = null;             }               if (chkSendWx.Checked)             {                 Common.NoticeWxUserIds = txtWxUIDs.Text.Trim();             }             else             {                 Common.NoticeWxUserIds = null;             }           }           private bool IsRightClickSelectedItem(Point point)         {             foreach (ListViewItem item in listView1.SelectedItems)             {                 if (item.Bounds.Contains(point))                 {                     return true;                 }             }             return false;         }           #endregion             private void btnExec_Click(object sender, EventArgs e)         {             string state = (btnExec.Tag ?? "S").ToString();             if (state == "S")             {                 InitNoticeSetting();                 Common.ClearInterval = int.Parse(txtRefreshInterval.Text);                 Common.ListenInterval = int.Parse(txtListenInterval.Text);                 StartListenService();             }             else             {                 StopListenService();             }           }           private void listView1_SelectedIndexChanged(object sender, EventArgs e)         {             if (listView1.SelectedItems.Count <= 0) return;               string programId = listView1.SelectedItems[0].Tag.ToString();             string tabPgName = string.Format("tabpg_{0}", programId);             if (tabControl1.TabPages.ContainsKey(tabPgName))             {                 tabControl1.SelectedTab = tabControl1.TabPages[tabPgName];             }             else             {                 MessageBox.Show("未找到相应的程序监控记录！");                 listView1.SelectedItems[0].ForeColor = Color.Red;             }         }             private void FrmMain_Load(object sender, EventArgs e)         {             InitListViewStyle();         }           private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)         {             if (MessageBox.Show("您确定要退出吗？退出后将无法正常监控各程序的运行状况", "退出提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.Cancel)             {                 e.Cancel = true;                 return;             }               StopListenService();         }           private void btnTestSend_Click(object sender, EventArgs e)         {             var wx = new WeChat();             var msg = wx.SendMessage("kyezuo", "测试消息，有程序停止运行了，赶紧处理！");             MessageBox.Show(msg["errmsg"].ToString());         }           private void listView1_MouseUp(object sender, MouseEventArgs e)         {             if (e.Button == MouseButtons.Right && IsRightClickSelectedItem(e.Location))             {                 ctxMuPop.Show(listView1, e.Location);             }         }           private void removeToolStripMenuItem_Click(object sender, EventArgs e)         {             if (listView1.SelectedItems.Count <= 0) return;               string programId = listView1.SelectedItems[0].Tag.ToString();             if (Common.ProgramInfos[programId].RunState != -1)             {                 MessageBox.Show("只有被监控的程序处于已停止状态的监控项才能移除，除外情况请务必保持正常！");                 return;             }               RemoveListenItem(programId);           }                     } }

窗体类中主要是用到了几个更新UI上控件信息的方法以及开启、关闭WCF服务的方法，很简单，一看就明白，无需多讲。

FrmMain.Designer.cs：（Form窗体设计类，系统自动生成的，再此贴出是便于大家可以直接COPY到自己的代码中直接用）

+ View Code

被监控的客户端程序集成WCF监听客户端很简单，只需引用ProgramMonitor.Core，然后实例化ListenClient，最后就可以通过该ListenClient与心跳监控系统进行双工通讯，在此就不贴出源代码了。

上述代码中还有用到两个类：

DataAccess：数据访问类，这个我之前的文章有介绍，详见：DataAccess通用数据库访问类，简单易用，功能强悍

WeChat：微信企业号发送消息类，注意是微信企业号，不是公众号，这里我也贴出源代码来，供大家了解：

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using Newtonsoft.Json; using Newtonsoft.Json.Linq; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Text; using System.Web;   namespace ProgramMonitor.Service {     public class WeChat     {         private readonly string _url = null;         private readonly string _corpid = null;         private readonly string _secret = null;         public WeChat()         {             _url = "https://qyapi.weixin.qq.com/cgi-bin";             _corpid = "CorpID是企业号的标识，每个企业号拥有一个唯一的CorpID";             _secret = "secret是管理组凭证密钥，系统管理员在企业号管理后台创建管理组时，企业号后台为该管理组分配一个唯一的secret";         }             public string GetToken(string url_prefix = "/")         {             string urlParams = string.Format("corpid={0}&corpsecret={1}", HttpUtility.UrlEncodeUnicode(_corpid), HttpUtility.UrlEncodeUnicode(_secret));             string url = _url + url_prefix + "gettoken?" + urlParams;             string result = HttpGet(url);             var content = JObject.Parse(result);             return content["access_token"].ToString();         }           public JObject PostData(dynamic data, string url_prefix = "/")         {             string dataStr = JsonConvert.SerializeObject(data);             string url = _url + url_prefix + "message/send?access_token=" + GetToken();             string result = HttpPost(url, dataStr);             return JObject.Parse(result);         }           public JObject SendMessage(string touser, string message)         {             var data = new { touser = touser, toparty = "1", msgtype = "text", agentid = "2", text = new { content = message }, safe = "0" };             var jResult = PostData(data);             return jResult;         }             private string HttpPost(string Url, string postDataStr)         {               HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);             request.Method = "POST";             request.ContentType = "application/x-www-form-urlencoded";             byte[] data = Encoding.UTF8.GetBytes(postDataStr);             request.ContentLength = data.Length;             Stream myRequestStream = request.GetRequestStream();             myRequestStream.Write(data, 0, data.Length);             myRequestStream.Close();               HttpWebResponse response = (HttpWebResponse)request.GetResponse();             Stream myResponseStream = response.GetResponseStream();             StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);             string retString = myStreamReader.ReadToEnd();             myStreamReader.Close();             myResponseStream.Close();               return retString;         }           public string HttpGet(string Url, string urlParams = null)         {             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (string.IsNullOrEmpty(urlParams) ? "" : "?") + urlParams);             request.Method = "GET";             request.ContentType = "text/html;charset=UTF-8";               HttpWebResponse response = (HttpWebResponse)request.GetResponse();             Stream myResponseStream = response.GetResponseStream();             StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);             string retString = myStreamReader.ReadToEnd();             myStreamReader.Close();             myResponseStream.Close();               return retString;         }       } }

具体的关于微信企业号开发文档，可参见：http://qydev.weixin.qq.com/wiki/index.php

最后的效果如下：

心跳监控程序监控效果：

手机收到异常消息：

  （《-这是企业号发出的消息）                    （《-这里短信消息，当然发短信是我公司的平台接口发出的，发短信是需要RMB的，故不建议）