利用WCF的双工通讯实现一个简单的心跳监控系统

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}\t{1}({2})\t{3} \n", 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）

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）

 

好了本文就到此结束，可能功能相对简单，还有一些不足，欢迎大家评论交流，谢谢！

 

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