Question

I have written a windows service which in turn calls a web service. When I run the windows service from a test app., it works perfectly. However when I install the service and then start it, it stops almost immediately. The only two entries I see in the log are Constructor and Thread Started. Not sure what is wrong.

public partial class WindowsService : ServiceBase
{
    public LogManager.LogFile _log;
    public Thread m_thread;
    protected TimeSpan m_delay;

    CommonFunctions _cf = new CommonFunctions();
    DBFunctions _db = new DBFunctions();

    public WindowsService()
    {
        InitializeComponent();
        _log = new LogManager.LogFile(@"c:\test\servicelog.txt", true, true);
        _log.WriteToLog("Constructor", LogLevel.Level0);
    }


    protected override void OnStart(string[] args)
    {

       m_delay = new TimeSpan(0,0,300);
       base.OnStart(args);

        try
        {
            m_thread = new System.Threading.Thread(Execute);
            m_thread.Start();
            _log.WriteToLog("Thread Started", LogLevel.Level0);
        }
        catch (Exception ex)
        { _log.WriteToLog(ex.Message, LogLevel.Level0); }

    }

  public void Execute()
    {
        _log.WriteToLog("Begin Execute...", LogLevel.Level0);

        try
        {

            ProcessNewLMSUsers();

         }
        catch (Exception ex)
        {
             _log.WriteToLog(ex.Message.ToString());
        }

     }

    private void ProcessNewLMSUsers()
    {
        try
        {
            _log.WriteToLog("Begin: Processing new LMS Users", LogLevel.Level1);

            // Check for new users in the LMS.
            string callErrorText = "";
            bool userAdded = false;

            LMSWS.SSO lms = _cf.GetLMSSSOWS(); **// this is a web service**
            lms.Timeout = 99999;


          }

             REST OF THE CODE.................
     }

Answer 1

I can’t see there is anything wrong with your code. but you can try to put a “Thread.Sleep(20000); ” code at the begining of OnStart method. e.g.

protected override void OnStart(string[] args)
{
   Thread.Sleep(20000); 

   m_delay = new TimeSpan(0,0,300); //set a break-point here
   base.OnStart(args);

    try
    {
        m_thread = new System.Threading.Thread(Execute);
        m_thread.Start();
        _log.WriteToLog("Thread Started", LogLevel.Level0);
    }
    catch (Exception ex)
    { _log.WriteToLog(ex.Message, LogLevel.Level0); }

}

and once you start this service program in Windows Service, then you have to quickly attach you source code to the service program. In visual studio, it’s menu “Debug” -> “Attach to Process…”. then you can set break-point in your source code anywhere to check what’s going wrong.