Timer.Elapsed Event (System.Timers)

Imports System
Imports System.Timers

Public Class Timer1

    Private Shared aTimer As System.Timers.Timer

    Public Shared Sub Main()
        ' Normally, the timer is declared at the class level,
        ' so that it stays in scope as long as it is needed.
        ' If the timer is declared in a long-running method,  
        ' KeepAlive must be used to prevent the JIT compiler 
        ' from allowing aggressive garbage collection to occur 
        ' before the method ends. You can experiment with this
        ' by commenting out the class-level declaration and 
        ' uncommenting the declaration below; then uncomment
        ' the GC.KeepAlive(aTimer) at the end of the method.
        'Dim aTimer As System.Timers.Timer

        ' Create a timer with a ten second interval.
        aTimer = New System.Timers.Timer(10000)

        ' Hook up the Elapsed event for the timer.
        AddHandler aTimer.Elapsed, AddressOf OnTimedEvent

        ' Set the Interval to 2 seconds (2000 milliseconds).
        aTimer.Interval = 2000
        aTimer.Enabled = True

        Console.WriteLine("Press the Enter key to exit the program.")
        Console.ReadLine()

        ' 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)
    End Sub

    ' Specify what you want to happen when the Elapsed event is 
    ' raised.
    Private Shared Sub OnTimedEvent(source As Object, e As ElapsedEventArgs)
        Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime)
    End Sub
End Class

' This code example produces output similar to the following:
'
'Press the Enter key to exit the program.
'The Elapsed event was raised at 5/20/2007 8:42:27 PM
'The Elapsed event was raised at 5/20/2007 8:42:29 PM
'The Elapsed event was raised at 5/20/2007 8:42:31 PM
'...

using System;
using System.Timers;

public class Timer1
{
    private static System.Timers.Timer aTimer;

    public static void Main()
    {
        // Normally, the timer is declared at the class level,
        // so that it stays in scope as long as it is needed.
        // If the timer is declared in a long-running method,  
        // KeepAlive must be used to prevent the JIT compiler 
        // from allowing aggressive garbage collection to occur 
        // before the method ends. You can experiment with this
        // by commenting out the class-level declaration and 
        // uncommenting the declaration below; then uncomment
        // the GC.KeepAlive(aTimer) at the end of the method.
        //System.Timers.Timer aTimer;

        // Create a timer with a ten second interval.
        aTimer = new System.Timers.Timer(10000);

        // Hook up the Elapsed event for the timer.
        aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);

        // Set the Interval to 2 seconds (2000 milliseconds).
        aTimer.Interval = 2000;
        aTimer.Enabled = true;

        Console.WriteLine("Press the Enter key to exit the program.");
        Console.ReadLine();

        // 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);
    }

    // Specify what you want to happen when the Elapsed event is 
    // raised.
    private static void OnTimedEvent(object source, ElapsedEventArgs e)
    {
        Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime);
    }
}

/* This code example produces output similar to the following:

Press the Enter key to exit the program.
The Elapsed event was raised at 5/20/2007 8:42:27 PM
The Elapsed event was raised at 5/20/2007 8:42:29 PM
The Elapsed event was raised at 5/20/2007 8:42:31 PM
...
 */

#using <system.dll>

using namespace System;
using namespace System::Timers;

public ref class Timer1
{
private: 
   static System::Timers::Timer^ aTimer;

public:
   static void Demo()
   {
      // Normally, the timer is declared at the class level,
      // so that it stays in scope as long as it is needed.
      // If the timer is declared in a long-running method,  
      // KeepAlive must be used to prevent the JIT compiler 
      // from allowing aggressive garbage collection to occur 
      // before the method ends. You can experiment with this
      // by commenting out the class-level declaration and 
      // uncommenting the declaration below; then uncomment
      // the GC::KeepAlive(aTimer) at the end of the method.
      //System::Timers::Timer^ aTimer;

      // Create a new Timer with Interval set to 10 seconds.
      aTimer = gcnew System::Timers::Timer( 10000 );

      // Hook up the Elapsed event for the timer.
      aTimer->Elapsed += gcnew ElapsedEventHandler( Timer1::OnTimedEvent );

      // Set the Interval to 2 seconds (2000 milliseconds).
      aTimer->Interval = 2000;
      aTimer->Enabled = true;

      Console::WriteLine("Press the Enter key to exit the program.");
      Console::ReadLine();

      // 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);
   }


private:
   // Specify what you want to happen when the Elapsed event is 
   // raised.
   static void OnTimedEvent( Object^ source, ElapsedEventArgs^ e )
   {
      Console::WriteLine( "The Elapsed event was raised at {0}", e->SignalTime );
   }

};

int main()
{
   Timer1::Demo();
}

/* This code example produces output similar to the following:

Press the Enter key to exit the program.
The Elapsed event was raised at 5/20/2007 8:42:27 PM
The Elapsed event was raised at 5/20/2007 8:42:29 PM
The Elapsed event was raised at 5/20/2007 8:42:31 PM
...
 */