一个简单的windows services demo(c#)

功能:

每三十分钟扫描进程,如果不存在进程fromdemo.exe.则启动该应用程序.

1.检测进程进否存在

 /// <summary>
        /// 检查进程是否已启动
        /// </summary>
        /// <param name="processName"></param>
        /// <returns></returns>
          private static bool IsExistProcess(string processName)
        {
            Process[] MyProcesses = Process.GetProcessesByName(processName);
            if (MyProcesses != null && MyProcesses.Length > 0)
            {
                return true;
            }
            return false;
        }

2.建一个windows services 工程,添加一个System.Timers.Timer来使用.

  // Create a timer with a 60*5 second interval.
  aTimer = new System.Timers.Timer(60000*30); 

  aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
  aTimer.Enabled = true;

  在OnTimedEvent里写要处理的内容.

if (!IsExistProcess("FormDemo"))
            {
              Process p = new Process();
               string location = System.Reflection.Assembly.GetExecutingAssembly().Location;
                    string dir = location.Substring(0, location.LastIndexOf("\\") + 1);
                    p.StartInfo.FileName = dir + "FormDemo.exe";
                    p.Start();
                }
　　　　　　　}

3.添加安装程序.我使用localsystem使用户,自动启动

在ServiceProcessInstaller的onCommited事件里设置服务可以与桌面交互,否则会看不到界面,虽然进程里面会有.

 //允许桌面交互
        private void serviceProcessInstaller_Committed(object sender, InstallEventArgs e)
        {
            try
            {
                ConnectionOptions myConOptions = new ConnectionOptions();
                myConOptions.Impersonation = ImpersonationLevel.Impersonate;
                ManagementScope mgmtScope = new System.Management.ManagementScope(@"root\CIMV2", myConOptions);
                mgmtScope.Connect();
                ManagementObject wmiService = new ManagementObject("Win32_Service.Name='" + serviceInstaller.ServiceName + "'");
                ManagementBaseObject InParam = wmiService.GetMethodParameters("Change");
                InParam["DesktopInteract"] = true;
                ManagementBaseObject OutParam = wmiService.InvokeMethod("Change", InParam, null);
                
                 #region Windows服务安装后自动启动   
                    Process p = new Process();   
                    p.StartInfo.FileName = "cmd.exe";   
                    p.StartInfo.UseShellExecute = false;   
                    p.StartInfo.RedirectStandardInput = true;   
                    p.StartInfo.RedirectStandardOutput = true;   
                    p.StartInfo.RedirectStandardError = true;   
                    p.StartInfo.CreateNoWindow = true;   
                    p.Start();
                    string Cmdstring = "net start " + serviceInstaller.ServiceName;  
                    p.StandardInput.WriteLine(Cmdstring);   
                    p.StandardInput.WriteLine("exit");  
               #endregion   
 
            }
            catch 
            {
                EventLog.WriteEvent("test failer",null,null,null);
            }

        }

第一次我使用安装项目进行安装,没有顺利进行,后来改为批处理了,直接把对应版本的installutil.exe拷由到服务所在路径,然后

installutil /i  myservice.exe

net start myservice

pause