Samer Ibrahim's Blog

Thanks

hello ,

I have same problem.

any one can help me ???

I am having the same problem sam, can you please email me on grant.thomson@savante.co.uk

I have been writing a windows application using forms; have tried both system.timers.timer and forms.timer and both seem to fail.  

Do you think going to threading.timer is the silver bullet here?

i have created a project and  web service to it.... the service which is i created it use the exe file of the project. but service is not running..

Could some please explain how to switch from a system.windows.form.timer  to a System.Threading.Timer

Sorry for posting again. I have been trawling the internet trying to find a meaningful example of System.Threading.Timer in plain english.

I am beginning to think that it doesn't.

I am trying to do something easy (so I thought). I want a service to write to a text file every  minute in VB.net 2005, it doesn't appear possible.

If you could provide something simple to do this, I would be very grateful.

Nice one! Thanks a lot, this helped me out BIGTIME!

The funny thing is System.Timers.Timer uses System.Threading.Timer internally ( can be found through Reflector). So its a wrapper around Threading.Timer  and microsoft tried to do some fancy things around the wrapper having some bugs in it. So its advised to use Threading.Timer.

There seems to be a similar problem with System.Windows.Forms.Timer not firing. I found if I called Stop() and Start() to frequently it would stop firing at all. Using System.Threading.Timer fixed the problem even though it is a forms based application

Hello all

I am using system.timer bt it is not working properly

So i have decided to switch to system.threading.timers

Please someone tell me how to switch from system.timer to system.threading.timer

By the way, I just wanted to point out that I was able to reproduce the dead timer issue on a VM server 2003 w/ SP1 which had .NET 2.0 Framework--it appears this issue is not isolated to JUST the 1.1 Framework

DDJames - To switch from system.timer to system.threading.timer; go into the Designer file and manually modify all instances of the times. So if the file that has the time is Service.vb, go to the Service.Designer.vb file and modify it. Hope that helps.

I am trying the examples posted on vbcity.com/.../topic.asp

private System.Timers.Timer MyTimer;

        protected override void OnStart(string[] args)

       {

           // Interval in milliseconds

           double interval = Properties.Settings.Default.TimeDelay * 60000;

           // Create timer object

           myTimer = new System.Timers.Timer(interval);

           // Set to run more than once

           timer.AutoReset = true;

           // Delegate to handle the timer event

           timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);

           // Start the timer

           timer.Start();

           // Prevents garbage collection from occuring in long running methods

           GC.KeepAlive(timer);

       }

       private void timer_Elapsed(object sender, ElapsedEventArgs e)

       {

             try

             {

                     myTimer.Stop();

                      // Place call here to execute code

              }

              finally

             {

                     myTimer.Start();

              }

        }

He states that the timer stops running due to garbage collection and that every time the timer is stopped it is subjet to garbage collection. I don't know if this is the final solution but this is where I am with the process

This explains the issue

support.microsoft.com/.../842793

The URLs at the start of the post all appear to be dead. Please update them if possible.

Here's a great article that will help you understand Timers in Windows:

msdn.microsoft.com/.../cc164015.aspx

Does the same effect for Visual Studio 2008 as well?

I am able to reproduce this in VS 2008 as well.

Can someone help me with system.threading.. The above links are broken.. Any sample code?

patrik.lund@hssmedia.fi

System.Windows.Forms.Timer does not work in Windows Service. It seems  the Timer_Tick event is handled differently. I used Threading timer instread of  Forms Timer and call the Timeercallback rather than an event.

Ouch! the links in the article are all dead (404 not found).

the links you provide are no longer available!

Server Error

404 - File or directory not found.

The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.

windows timer is a worst case................

it skips the display seconds(i.e, 45 to 47 or 54 to 56

Hah, seriously? That's rediculous. No way

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Pseudo code for my service timer is given below:

timer_Elapsed()

{

  try

  {

    //Disable timer

    timer.Enabled = false

    //Perform operations (taking 10 secs to 3 mins to complete)

  }

  catch

  finally

  {

    //Enable the timer again

    timer.Enabled = true

  }

}

Even my service logs suggest the timer_elapsed event stops firing after some time. And if the service is restarted, it again starts working and later on its the same scene.

Can anybody confirm if the Garbage Collection issue happens with .Net v2.0 as well and not just 1.0 or 1.1?

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iPhone and iPad Application Development - Designing App Icons

2010 has seen a sudden upsurge in the market of Mobile iOS devices. There astronomical rise in the sales of iPhones and iPads. The Apple Application Store is directly accessible to the iPhone, iPad and iPod devices that run on the iOS.When any iOS designer submits the mobile application, he/she has to also submit the icon along with it. The process of developing an icon could consume a bit of time but its returns are handsome too.There are different icons each having different size and used for specific purpose. There are different devices that run the iOS. This implies that the application designer has to know which sort of icon is to be used when and how.Icon sizes for iPhone /iPod applications:The Icon sizes for Application, iPhone 4, App Store, Spotlight Search and iPhone 4 spotlights are 57x57px, 114x114px, 512x512px, 29x29px and 58x58px respectively.There are not many variations in the icon sizes for iPhone applications. The size of the official application icon which is displayed on the home screen of the user is 57x57px. Higher resolution is also supported by the iPhone 4 so it is better to include the icon with size 114x114px, though not necessary.The largest icon size that is recommended is 512 x 512px. This icon is quite big. This icon is meant for being displayed over the App Store as well as when the visitor is browsing the applications in Cover Mode. When you start a new icon design with the help of the Photoshop it is better to start initially at 512px and then slowly decreasing the scale.Icons with a bit smaller size of 29Г—29px are supported for Spotlight search. The iPhone 4 features screen with higher resolutions and because of this the icon size for spotlight search should be 58Г—58px.Icon sizes for iPad applications:The Icon sizes for iPad Application, App Store, Spotlight Search and Settings are 72x72px, 512x512px, 50x50px, and 29x29px respectively.The touch screen of the iPad is comparatively larger than that of the iPhone or iPod. This allows the application icon to be a bit larger. It is 72x72px. The size of the App Store Icon which is 512x512px is the same as in the case of iPhone. The icon size for Spotlight Search is 50x50px. The icon of the size 29x29px can be used as a setting icon.A small icon will be displayed beside the tab if a settings page is created within the general funjctionality of the iOS. This allows inclusion of different user names and accounts and change of themes too. The smaller or minor options of the application can also be fiddled with because of this arrangement.The application developer should also note that the applications that offer icons in PNG files are only accepted by the Apple App Store.Copyright В© 2011

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Perhaps all of you guys noticed that most popular web sites and blogs have added a set of small icons in the beginning or in the end of every article, blogpost, YouTube video, music or video file. Some of these icons look familiar to you as you use relevant websites every day (for example, Twitter or Facebook), while others are still unknown. These icons are called social bookmarking widgets.Imagine such a situation. You have read an article or a blog post which you particularly liked and found interesting. Naturally, you want your friends to read this article as well. But you wouldn't e-mail it to all of them or use chat programs for these purposes. Why not use social media? All of your friends spend so much time in social networking and bookmarking websitea. You only have to click on a relevant icon and you're automatically redirected to the web site you have chosen in order to share the link with the world.Some webmasters only use a few icons. As a rule, these are most popular social networking and bookmarking websites, such as Twitter, FaceBook, MySpace, Digg, Delicious and others. In some cases the number of icons may reach 20 or even more. Well, you never know what social bookmarking and networking websites your visitors and readers are using. So, it is always better to give them a choice.But why install these widgets? How does a website owner benefit? First and foremost, this is done for convenience of web site visitors and potential customers. Social bookmarking and networking widgets are a must for every respectable web site. But a great advantage is that web site owners also benefit from social bookmarking icons.Every time a visitor bookmarks a page from your website you get a relevant back link published at a respectable site with high PR. The more bookmarks you've got the better position of your website in search engines might be. In such a way both web site visitots and owners benefit from installment of social networking and bookmarking widgets.

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Yes this is the case that System.timers.Timer does not fire in windows service often. You can try this code

System.Timers.Timer aTimer = new System.Timers.Timer(5000);

//If the timer is declared in a long-running method, use

// KeepAlive to prevent garbage collection from occurring before the method ends.

      GC.KeepAlive(aTimer);          

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