Windows Service with Timer Question - Page 2

Ryan

Hello everyone,

I have made a service that starts timers when it starts. I have
another windows form application that stops and starts the service. Do
I need to deal with any started timers when the service stops? Being
new at this service stuff, I don't know if it holds state or memory
and I need to stop all active timers or if the magical gc will come
along and help out.

Thanks, I hope that makes sense.

Have a great day,
Ryan

Jun 14 '07

Subscribe Reply

1945

Phill W.

Smokey Grindle wrote:

every MS person I ever talked to said use threading.timer s... I am talking
about in person here at tech demos and such... they always shyed away from
using while loops and sleeping

IMHO, there's one very Good Reason for /not/ using a Timer.

It's called JIT compilation.

You write a Service and put a Timer in it.
You code up the routine that the Timer calls.
This routine references an external Assembly.

You deploy the Service.
Somehow, you miss the dependent assembly.

Your deployed service runs!
It starts and stops perfectly!
It doesn't report /any/ errors or Exceptions!

But it never does any useful work.

Why???

When the Timer fires, the runtime attempts to JIT the method invoked by
the Timer.
With the referenced Assembly /missing/, this JIT-linking fails but the
runtime doesn't report this and, if the Exception gets logged anywhere,
I've /never/ managed to find it. You can't catch this Exception - it's
gets thrown into the depths of the runtime and the Service
Infrastructure - you never see it.

I've found that calling the "worker" method from another one inside the
service - one /with/ a loop and Sleep(s) - works 100% reliably, and you
even get to catch the Exception if you really want to. ;-)

Regards,
Phill W.

Jun 19 '07 #11

Similar topics

15696

timer, windows service

by: andrewcw | last post by:

I am trying to do a windows service with C#. I am using as a base the VB.NET article in VS, but I thing the WITHEVENTS timer notation is a delegate. Can anyone provide sample code & anh hints. Thanks Andrew

C# / C Sharp

4716

Problems with Windows Service

by: Jesper Stocholm | last post by:

I have created a simple service which just copies a fil to a new file with a new name on certain intervals (the service implements a timer). I have no problems installing the service and the log-entries I have created on stop() and start() in the eventlog works fine as well. However - the actual task is never executed. I catch the execution of the tick and in the finally-block I write to the eventlog as well. But only one entry is creates...

C# / C Sharp

33589

Timer Tick Event not Working in Windows Service

by: J. Hill | last post by:

I have a Windows Service with a timer but the .Tick event is not being fired/called. Don't know what code to include...I enabled and started the timer...I have the exact same code in a Windows form and it works fine, but in the service: nothing. .... this.components = new System.ComponentModel.Container(); this.tmrTimer = new System.Windows.Forms.Timer(this.components); // // tmrTimer //

C# / C Sharp

5093

Windows service with timer doesn't work in Windows 2003 server

by: Dhilip Kumar | last post by:

Hi all, I have developed a windows service using the windows service project template in VS.NET. I have used three controls in the service, a timer, performance counter and a message queue control. The service will "sleep" for 'n' seconds using the timer control and whenever the timer_elapsed event occurs, I use the performance counter object to determine availability of few resources. Based on the availability of resources, I use the...

C# / C Sharp

2201

Timers and Windows Service question

by: Nathan Kovac | last post by:

I have a feeling I am missing something simple, but I just can't find it. Perhaps someone can give me a lead on where to look. I will describe the issue then post my code to the web service. My issue is simply getting timers to work. I have a DatabaseManager.DataManagerFacade which contains a timer. Every 6 seconds it updates stock data using an online webservice. I wrote have 2 possible startup projects to make the service work. One...

C# / C Sharp

350

Windows Services

by: Yves Royer | last post by:

Hi all, I have a little question about Windows Services. For my app i need 3 different Windows Services, each with its own functionality. I'm trying to make a test service to see what happens when a service is stopped or started. What i'm trying do do now is adding a timer so after a specific period of time the service does something, in the example below writing to a text

C# / C Sharp

5623

UnhandledException in Windows Service

by: Groundskeeper | last post by:

I can't seem to get a custom UnhandledException handler working for a Windows Service I'm writing in VB.NET. I've read the MSDN and tried various different placements of the AddHandler call, to no avail. Here's the code I'm using, all of which is in the main service class: Protected Overrides Sub OnStart(ByVal args() As String) AddHandler AppDomain.CurrentDomain.UnhandledException, _

Visual Basic .NET

606

Windows Service Question

by: Tom | last post by:

Using multiple System.Timers.Timer objects in a Windows Service for performing multi-thread activities in a periodic fashion. Timers are AutoReset=false, to only have a single timer execution thread running at any given moment. Typically, timers will have an interval of 5 to 15 minutes. Conditionally, the interval may be set to 1 second (1000 ms) before the next call to Timer.Start(). Here is the question: if the interval is one...

C# / C Sharp

3312

Windows Service Help

by: dm3281 | last post by:

I'm really starting to hate writing services -- or trying to, anyway. Why do I need to rename my project to the service name? Why do I need to set the "ServiceName" property to my service name? Why do I need to set a property within my code to the service name? Are all these required or am I just doing this for consistency purposes?

C# / C Sharp

9704

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...

General

10558

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...

C / C++

10318

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

by: jinu1996 | last post by:

In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...

Online Marketing

10302

The easy way to turn off automatic updates for Windows 10/11

by: Hystou | last post by:

Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...

Windows Server

10069

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

by: tracyyun | last post by:

Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...

General

9130

AI Job Threat for Devs

by: agi2029 | last post by:

Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...

Career Advice

6844

Couldn’t get equations in html when convert word .docx file to html file in C#.

by: conductexam | last post by:

I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...

C# / C Sharp

5636

Windows Forms - .Net 8.0

by: adsilva | last post by:

A Windows Forms form does not have the event Unload, like VB6. What one acts like?

Visual Basic .NET

4277

transfer the data from one system to another through ip address

by: 6302768590 | last post by:

Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system

C# / C Sharp