Forgot your password? Ask a Question. Please Sign up or sign in to vote. See more: C. Thanks Hello All Thanks for your answers,i have created the timer and it should execute a method every 1 sec but my problem is the timer works for several seconds and then stop automatically i need someone to explain why this is happening.
Copy Code. Posted Apr am snake1. Add a Solution. Top Rated Most Recent. Accept Solution Reject Solution. Take a look at System. Timer you have more options, where System. Timer is a lightweight timer.
Posted Apr am Kim Togo. In this section, you add a custom event log to the Windows service. The EventLog component is an example of the type of component you can add to a Windows service. Define a custom event log. Add a using statement to MyNewService. Diagnostics namespace:. In the code editor for MyNewService. Add code that writes an entry to the event log when the service starts:. Because a service application is designed to be long-running, it usually polls or monitors the system, which you set up in the OnStart method.
The OnStart method must return to the operating system after the service's operation has begun so that the system isn't blocked.
To set up a simple polling mechanism, use the System. Timer component. The timer raises an Elapsed event at regular intervals, at which time your service can do its monitoring.
You use the Timer component as follows:. Add the following code in the MyNewService. OnStart event to set up the polling mechanism:. Timers namespace:. Elapsed event:. In the MyNewService class, add a member variable. It contains the identifier of the next event to write into the event log:.
Instead of running all your work on the main thread, you can run tasks by using background worker threads. For more information, see System. Insert a line of code in the OnStop method that adds an entry to the event log when the service is stopped:. You can override the OnPause , OnContinue , and OnShutdown methods to define additional processing for your component.
Services report their status to the Service Control Manager so that a user can tell whether a service is functioning correctly. InteropServices namespace:.
Add the following code to MyNewService. Before you run a Windows service, you need to install it, which registers it with the Service Control Manager. Add installers to your project to handle the registration details.
In the Design view, select the background area, then choose Add Installer from the shortcut menu. By default, Visual Studio adds a component class named ProjectInstaller , which contains two installers, to your project. Now i need help on threads queue. Intially i have to allow to start 10 threads and remaining should be in queue.
Once all the threads process are completed i have to start timer. I have to implement this in my previous code windows service Can anyone help on this..
It seems that your original question has been resolved. Could you please post a new thread about the next problem so that we can focus on the new problem? Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. Archived Forums. Also discuss all the other Microsoft libraries that are built on or extend the. Sign in to vote. Hi I am creating multi threads in my windows service. Tuesday, January 3, PM.
Friday, January 6, PM. Hi, If you search the forums you can find many similar questions. Timer TimerCallbackMethod, args, 0, System. Change System. Infinite, System. FromMinutes 30D. Change delay, System. AppSettings[ "timerDuration" ]? ToInt64 ConfigurationSettings. With that, we have covered the main aspects you need to be aware of to create your concrete classes using the jump start code.
The above explanatory notes, together with a review of the sample code included in the article attachments, should be enough to get you well on the road to implementing your Service. The sections below offer additional insights into how it all works.
In this section, I'll explain how the abstracted jump start code co-ordinates Service state transitions between a Service component class and its workers.
Co-ordinating the transition of a Service state, for example a transition from Running to Stopping, presents us with this scenario:. Note: Rather than using a lock clause, we might have been able to use one of the newer Interlocked methods provided by the Framework. Personally, I prefer lock because it makes code more readable. To address the issue of needing to abstract the code that facilitates the worker classes querying the state of the service, we create a delegate with a parameter-less signature and a ServiceState return type:.
In the TimerWorker class, on each elapse of the timer, we use a call to the getServiceStateHandler handler to query the current state of the Service, and to take whatever action may be necessary:. The final piece of the puzzle is to ensure that each worker has an opportunity to stop gracefully when the Service needs to stop. This requirement is met by associating a ManualResetEvent with each worker as it is registered. You don't see this code in any of the snippets above, because it's slightly tucked away, but here it is, seeing the light of day:.
The OnPause implementation works in a very similar way as far this concept is concerned. Essentially, what happens is as follows:. It is important that you understand how the jump start code helps you with disposal of resources and where you need to pick up the slack yourself. The good news is that TimerServiceBase incorporates code that ensures that the Dispose method of each worker is called. The prerequisite is that a call to RegisterWorker must have been made for the worker, but if you hadn't done that, your worker wouldn't run anyway.
So, you don't need to concern yourself with making those calls happen, and disposal of the underlying System. Timer is of course taken care of for you.
Note: In the vary rare case that it be of any consequence, and for whatever it may be worth, the disposal code in TimerServiceBase will call Dispose for each worker in the reverse order to that in which the workers were registered. That is to say, the worker that was passed to the first call of RegisterWorker will be disposed of last, and the worker that was passed to the last call of RegisterWorker will be disposed of first.
The not-so-good news, which should hardly come as any surprise, is that the usual best practise Disposing rules still apply. If, for example, you use a managed IDisposable resource in your concrete worker class, you must :. There's a wealth of resources on how to use the library so I have deliberately kept this section brief.
In your Service component class, you can call the method DefaultLog , which gets your class an ILog logger using the standard methodology:. Just as for the service component class, in each of your derived worker classes you can use the Log property to do your logging. It may be sensible to check Log! The example PrimeCalService includes a working log4net xml-based configuration that you can reference as a starting point if you are new to log4net. Just take a look at the app.
I recommend you spend some additional time looking into the log4net documentation, because there are myriad ways to configure and use this library. I mentioned previously my belief that breaking your work down into units with short execution times is one of the keys to building Services that behave well.
If you have a need to run code in Work that is likely to execute over several minutes or longer, you are going to experience issues using the jump start code when your Service is stopped or paused by the SCM. The jump start code assumes that the timer of each worker will elapse regularly enough to ensure that the worker is adequately responsive to changes in the state of its Service; and the underlying timer will not elapse at all between entering and exiting Work.
If this doesn't make sense to you, take a read through and understand the TimerWorker code, and I'm sure it won't take you long to see the problem. You do, however, have the option of checking the service state during the execution of your Work.
The base class provides a boolean ServiceStateRequiresStop property for exactly this purpose. If you are able to check its value often enough as your work executes and you are able to quickly break out of your work should the result be true which means the Service state is no longer Running , that might be enough to keep your Service responsive. Embedded in the Sample service attached to this article is a modified routine for the calculation of Prime numbers.
The original routine was sourced here:. It is not explicitly credited by the person who posted it. If it belongs to you, please let me know and I will be happy to formally acknowledge you here. Sign in Email.
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