Question

我在VS2010中创建一个包含多个服务的Windows服务项目。我试图在不使用复杂的安装程序的情况下一起安装它。但是，它似乎回滚而不起作用。

这是Program.cs：

static class Program
{
    static void Main(string[] args)
    {
        bool install = false, uninstall = false, console = false;
        WindowsServiceInstaller inst = new WindowsServiceInstaller();

        if (args.Length > 0)
        {
            foreach (string arg in args)
            {
                switch (arg)
                {
                    case "-i":
                    case "-install":
                        install = true;
                        break;
                    case "-u":
                    case "-uninstall":
                        uninstall = true;
                        break;
                    case "-c":
                    case "-console":
                        console = true;
                        break;
                    default:
                        Console.Error.WriteLine("Argument not expected: " + arg);
                        break;
                }
            }
        }

        if (uninstall)
        {
            inst.InstallServices(false, args);
        }

        if (install)
        {
            inst.InstallServices(true, args);
        }

        ServiceBase[] ServicesToRun;
        ServicesToRun = new ServiceBase[] 
        { 
            // scans Email table for outbound email jobs; uses multiple threads to lock and work on data in Email table
              new EmailLogScanner()

            // generates email digest of document status on secheduled basis; single thread
            , new EmailStatusDigester() 

            // keeps Fax table and third-party fax service accounts synchronized; uses a fixed nb of threads, one thread syncs one account at a time
            , new FaxSynchronizer()     
        };

        if (console)
        {

            foreach (IDebuggableService srv in ServicesToRun)
            {
                string[] strs = new string[] { String.Empty };
                srv.DebugStart(strs);
            }

            Console.WriteLine("Press any key to terminate...");
            Console.ReadKey();

            foreach (IDebuggableService srv in ServicesToRun)
            {
                srv.DebugStop();
            }

            Console.WriteLine("Service has exited.");
        }
        else
        {
            ServiceBase.Run(ServicesToRun);
        }
    }
}

这是WindowsServiceInstaller.cs：

[RunInstaller(true)]
public class WindowsServiceInstaller : Installer 
{
    public WindowsServiceInstaller()
    {
        ServiceProcessInstaller serviceProcessInstaller = new ServiceProcessInstaller();
        serviceProcessInstaller.Account = ServiceAccount.NetworkService;
        serviceProcessInstaller.Username = null;
        serviceProcessInstaller.Password = null;
        Installers.Add(serviceProcessInstaller);

        ServiceInstaller emailLogScannerInstaller = new ServiceInstaller();
        emailLogScannerInstaller.DisplayName = "Email Scanner";
        emailLogScannerInstaller.StartType = ServiceStartMode.Automatic;
        emailLogScannerInstaller.ServiceName = "EmailLogScanner"; // must match the ServiceBase ServiceName property
        emailLogScannerInstaller.Description = "Scan for and sends out pending emails in stack.";
        Installers.Add(emailLogScannerInstaller);

        ServiceInstaller emailStatusDigesterInstaller = new ServiceInstaller();
        emailStatusDigesterInstaller.DisplayName = "Status Digester";
        emailStatusDigesterInstaller.StartType = ServiceStartMode.Automatic;
        emailStatusDigesterInstaller.ServiceName = "EmailDigester";
        emailStatusDigesterInstaller.Description = "Prepares document status email digests.";
        Installers.Add(emailStatusDigesterInstaller);

        ServiceInstaller faxSynchronizerInstaller = new ServiceInstaller();
        faxSynchronizerInstaller.DisplayName = "Fax Synchronizer";
        faxSynchronizerInstaller.StartType = ServiceStartMode.Automatic;
        faxSynchronizerInstaller.ServiceName = "FaxSynchronizer";
        faxSynchronizerInstaller.Description = "Synchronizes database with external fax service(s).";
        Installers.Add(faxSynchronizerInstaller);           

    }

    public void InstallServices(bool doInstall, string[] args)
    {
        try
        {
            using (AssemblyInstaller aInstaller = new AssemblyInstaller(typeof(Program).Assembly, args))
            {
                IDictionary state = new Hashtable();
                aInstaller.UseNewContext = true;
                try
                {
                    if (doInstall)
                    {
                        aInstaller.Install(state);
                        aInstaller.Commit(state);
                    }
                    else
                    {
                        aInstaller.Uninstall(state);
                    }
                }
                catch
                {
                    try
                    {
                        aInstaller.Rollback(state);
                    }
                    catch { }
                    throw;
                }
            }
        }
        catch (Exception ex)
        {
            Console.Error.WriteLine(ex.Message);
        }
    }

}

记录的输出（当我在命令窗口中运行daemon.exe -i时，作为管理员）显示下面的文本。另外，我得到“无法从命令行启动服务”对话框：

Installing assembly 'C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.exe'.
Affected parameters are:
   i = 
   assemblypath = C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.exe
   logfile = C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.InstallLog
Installing service EmailLogScanner...
Service EmailLogScanner has been successfully installed.
Creating EventLog source EmailLogScanner in log Application...
See the contents of the log file for the C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.exe assembly's progress.
The file is located at C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.InstallLog.
Rolling back assembly 'C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.exe'.
Affected parameters are:
   logtoconsole = 
   i = 
   assemblypath = C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.exe
   logfile = C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.InstallLog
Restoring event log to previous state for source EmailLogScanner.
Service EmailLogScanner is being removed from the system...
Service EmailLogScanner was successfully removed from the system.

更新：当我在“aInstaller.Install（state）”行周围注释try ... catch块时，输出略有不同：

Installing assembly 'C:\Users\xxx\Documents\~Business\Projects\Daemon\bin\Release\Daemon.exe'.
Affected parameters are:
   i =
   assemblypath = C:\Users\xxx\Documents\~Business\Projects\Da
emon\bin\Release\Daemon.exe
   logfile = C:\Users\xxx\Documents\~Business\Projects\Daemon\
bin\Release\Daemon.InstallLog
Installing service EmailLogScanner...
Creating EventLog source EmailLogScanner in log Application...
Source EmailLogScanner already exists on the local computer.

是因为我已经设置了事件日志源吗？如果是这样，我如何跳过AssemblyInstaller中的该步骤？如果没有，哇？：）

Answer 1

你应该把这个

if (EventLog.SourceExists("YourEventSourceName"))
    EventLog.DeleteEventSource("YourEventSourceName");

服务安装开始时。

尝试安装Windows服务 - 此代码有什么问题？

1 个答案: