<?xml version="1.0" encoding="utf-8" ?><configuration>  <startup>    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />  </startup>  <appSettings>    <!--要守护的服务的服务名称-->    <add key="toWatchServiceName" value=http://www.mamicode.com/""/>    <!--守护服务的名称-->    <add key="serviceName" value=http://www.mamicode.com/"邮件提醒服务守护服务"/>    <!--每1分钟检查一次 以秒为单位-->    <add key="timerInterval" value=http://www.mamicode.com/"60"/>  </appSettings></configuration>

using System;using System.Collections.Generic;using System.ComponentModel;using System.Configuration;using System.Data;using System.Diagnostics;using System.Linq;using System.ServiceProcess;using System.Text;using System.Threading.Tasks;namespace WindowsService.Watch{    partial class ServiceWather : ServiceBase    {        private static string currentExePath = string.Empty;        public ServiceWather()        {            InitializeComponent();            currentExePath = AppDomain.CurrentDomain.BaseDirectory;        }        /// <summary>        /// 检查间隔        /// </summary>        private static readonly int _timerInterval = Convert.ToInt32(ConfigurationManager.AppSettings["timerInterval"]) * 1000;        /// <summary>        /// 要守护的服务名        /// </summary>        private static readonly string toWatchServiceName = ConfigurationManager.AppSettings["toWatchServiceName"];        private System.Timers.Timer _timer;        protected override void OnStart(string[] args)        {            //服务启动时开启定时器            _timer = new System.Timers.Timer();            _timer.Interval = _timerInterval;            _timer.Enabled = true;            _timer.AutoReset = true;            _timer.Elapsed += _timer_Elapsed;            LogHelper.WriteLog(currentExePath, "守护服务开启");        }        void _timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)        {            //如果服务状态为停止，则重新启动服务            if (!CheckSericeStart(toWatchServiceName))            {                StartService(toWatchServiceName);            }        }        protected override void OnStop()        {            if (_timer != null)            {                _timer.Stop();                _timer.Dispose();                LogHelper.WriteLog(currentExePath, "守护服务停止");            }        }        /// <summary>        /// 启动服务        /// </summary>        /// <param name="serviceName">要启动的服务名称</param>        private void StartService(string serviceName)        {            try            {                ServiceController[] services = ServiceController.GetServices();                foreach (ServiceController service in services)                {                    if (service.ServiceName.Trim() == serviceName.Trim())                    {                        service.Start();                        //直到服务启动                        service.WaitForStatus(ServiceControllerStatus.Running, new TimeSpan(0, 0, 30));                        LogHelper.WriteLog(currentExePath, string.Format("启动服务:{0}", serviceName));                    }                }            }            catch (Exception ex)            {                LogHelper.WriteLog(currentExePath, ex);            }        }        private bool CheckSericeStart(string serviceName)        {            bool result = true;            try            {                ServiceController[] services = ServiceController.GetServices();                foreach (ServiceController service in services)                {                    if (service.ServiceName.Trim() == serviceName.Trim())                    {                        if ((service.Status == ServiceControllerStatus.Stopped)                            || (service.Status == ServiceControllerStatus.StopPending))                        {                            result = false;                        }                    }                }            }            catch (Exception ex)            {                LogHelper.WriteLog(currentExePath, ex);            }            return result;        }        /// <summary>        /// 停止        /// </summary>        /// <param name="serviceName"></param>        private void StopService(string serviceName)        {            try            {                ServiceController[] services = ServiceController.GetServices();                foreach (ServiceController service in services)                {                    if (service.ServiceName.Trim() == serviceName.Trim())                    {                        service.Stop();                        //直到服务停止                        service.WaitForStatus(ServiceControllerStatus.Stopped, new TimeSpan(0, 0, 30));                        LogHelper.WriteLog(currentExePath, string.Format("启动服务:{0}", serviceName));                    }                }            }            catch (Exception ex)            {                LogHelper.WriteLog(currentExePath, ex);            }        }    }}