CODEWITHSUNDEEP
c#timer
ISeeSounds
ISeeSounds

Reputation: 117

Where is the Timer.Elapsed property?

I have included the System.Timers package, but when I type:

Timer.Elapsed; //its not working, the property elapsed is just not there.

I remember it was there in VB.NET. Why doesn't this work?

Upvotes: 8

Views: 56254

Answers (4)

John Unused
John Unused

Reputation: 35

The previous answers here are all correct, however with .net 6 / VS2022 now out and about nullability is big deal, and all the above answers will throw compiler warning CS8622.

Your solution will vary by application, but a safe catch all solution is to simply mark the source object as nullable in your callback function's parameters, like such:

...
    var timer = new System.Timers.Timer(2000); // every 2000ms
    timer.Elapsed += TimerElapsedHandler;
...

public void TimerElapsedHandler(object? source, ElapsedEventArgs e)
{
    //Your Handling Code Here
}

Then if you need to access 'source' for any reason be sure to check if it is null first.

Upvotes: 3

Shreyash Jain
Shreyash Jain

Reputation: 120

You need an event handler, then after Enabling while assigning event handler and stop in your handler a condition

 Timer = new System.Timers.Timer();
 Timer.Elapsed += new System.Timers.ElapsedEventHandler(PageLoaded);
 Timer.Interval = 3000;
 Timer.Enabled = true;

...................

 public void PageLoaded(object source, System.Timers.ElapsedEventArgs e)
        {
            // Do what ever here
            if (StopCondition)Timer.Enabled = false;
          
           
        }

Upvotes: 0

Adam
Adam

Reputation: 3665

Microsofts example. http://msdn.microsoft.com/en-us/library/system.timers.timer.elapsed.aspx

Elapsed is an event and therefore requires an eventhandler.

using System;
using System.Timers;

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

public static void Main()
{       
    // 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();       
}

// 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
...
 */

Upvotes: 6

Adam Lear
Adam Lear

Reputation: 38778

It's not a property. It's an event.

So you gotta provide an event handler that will execute every time the timer ticks. Something like this:

public void CreateTimer() 
{
    var timer = new System.Timers.Timer(1000); // fire every 1 second
    timer.Elapsed += HandleTimerElapsed;
}

public void HandleTimerElapsed(object sender, ElapsedEventArgs e)
{
    // do whatever it is that you need to do on a timer
}

Upvotes: 38

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