Repeating a function every few seconds

Question

I want to repeat a function from the moment the program opens until it closes every few seconds  What would be the best way to do this in C

User · Answer

Use a timer  Keep in mind that  NET comes with a number of different timers  This article covers the differences

User · Answer

There are lot of different Timers in the  NET BCL   System Timers Timer System Threading Timer System Windows Forms Timer System Web UI Timer System Windows Threading DispatcherTimer  When to use which   System Timers Timer  which fires an event and executes the code in one or more event sinks at regular intervals  The class is intended for use as a server-based or service component in a multithreaded environment  it has no user interface and is not visible at runtime  System Threading Timer  which executes a single callback method on a thread pool thread at regular intervals  The callback method is defined when the timer is instantiated and cannot be changed  Like the System Timers Timer class  this class is intended for use as a server-based or service component in a multithreaded environment  it has no user interface and is not visible at runtime  System Windows Forms Timer   NET Framework only   a Windows Forms component that fires an event and executes the code in one or more event sinks at regular intervals  The component has no user interface and is designed for use in a single-threaded environment  it executes on the UI thread  System Web UI Timer   NET Framework only   an ASP NET component that performs asynchronous or synchronous web page postbacks at a regular interval  System Windows Threading DispatcherTimer  a timer that s integrated into the Dispatcher queue  This timer is processed with a specified priority at a specified time interval   Source  Some of them needs explicit Start call to begin ticking  for example System Timers  System Windows Forms   And an explicit Stop to finish ticking  using TimersTimer   System Timers Timer   static void Main string   args        var timer   new TimersTimer 1000       timer Elapsed     s  e    gt  Console WriteLine  quot Beep quot        Thread Sleep 1000     1 second delay     timer Start        Console ReadLine        timer Stop        While on the other hand there are some Timers  like  System Threading  where you don t need explicit Start and Stop calls   The provided delegate will run a background thread   Your timer will tick until you or the runtime dispose it  So  the following two versions will work in the same way  using ThreadingTimer   System Threading Timer   static void Main string   args        var timer   new ThreadingTimer     gt  Console WriteLine  quot Beep quot    null  TimeSpan FromSeconds 1   TimeSpan FromSeconds 1        Console ReadLine       using ThreadingTimer   System Threading Timer  static void Main string   args        StartTimer        Console ReadLine       static void StartTimer         var timer   new ThreadingTimer     gt  Console WriteLine  quot Beep quot    null  TimeSpan FromSeconds 1   TimeSpan FromSeconds 1       But if your timer disposed then it will stop ticking obviously  using ThreadingTimer   System Threading Timer    static void Main string   args        StartTimer        GC Collect 0       Console ReadLine       static void StartTimer         var timer   new ThreadingTimer     gt  Console WriteLine  quot Beep quot    null  TimeSpan FromSeconds 1   TimeSpan FromSeconds 1

User · Answer

Use a timer  There are 3 basic kinds  each suited for different purposes    System Windows Forms Timer   Use only in a Windows Form application  This timer is processed as part of the message loop  so the the timer can be frozen under high load    System Timers Timer   When you need synchronicity  use this one  This means that the tick event will be run on the thread that started the timer  allowing you to perform GUI operations without much hassle    System Threading Timer   This is the most high-powered timer  which fires ticks on a background thread  This lets you perform operations in the background without freezing the GUI or the main thread   For most cases  I recommend System Timers Timer

User · Answer

For this the System Timers Timer works best     Create a timer myTimer   new System Timers Timer       Tell the timer what to do when it elapses myTimer Elapsed    new ElapsedEventHandler myEvent      Set it to go off every five seconds myTimer Interval   5000     And start it         myTimer Enabled   true      Implement a call with the right signature for events going off private void myEvent object source  ElapsedEventArgs e        See Timer Class   NET 4 6 and 4 5  for details

[c#] Repeating a function every few seconds

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