Pause timer if user presses up or down key, resume when they don't

Question

I am running a routine set of activities with a timer in C#.
public MainWindow()
RefreshTimer();
public void RefreshTimer()
var refreshTimer = new Timer();
refreshTimer.Elapsed += (sender, e) => RefreshPlotList(sender, e);
refreshTimer.Elapsed += (sender, e) => RefreshWatchList(sender, e);
refreshTimer.Interval = 2000;
refreshTimer.Enabled = true;
How would I pause the timer if the user presses the up or down key, and then resume it after the key action is done?

Answer 1

Sorry for the slow reply ... I got busy with weekend stuff.  ;0)
I'm assuming that the RefreshTimer() is only called once from the MainWindow (I should also mention that you forgot to start the Timer). And that's really all you need for that (create and start it once). However, I'd make the refreshTimer variable a class
member/field, instead of local to the RefreshTimer() method. That way, you can access it from the KeyUp and KeyDown event handlers and don't even need the _upDownKeyIsPressed variable.  Like this:
private System.Timers.Timer refreshTimer;
public MainWindow()
RefreshTimer();
public void RefreshTimer()
this.refreshTimer = new Timer();
refreshTimer.Elapsed += (sender, e) => RefreshPlotList(sender, e);
refreshTimer.Elapsed += (sender, e) => RefreshWatchList(sender, e);
refreshTimer.Interval = 2000;
refreshTimer.Start();
private void KeyUpPress(object sender, KeyEventArgs e)
if (e.Key == Key.Up || e.Key == Key.Down)
this.refreshTimer.Enabled = true;
Console.WriteLine(_upDownKeyIsPressed.ToString());
private void KeyDownPress(object sender, KeyEventArgs e)
if (e.Key == Key.Up || e.Key == Key.Down)
this.refreshTimer.Enabled = false;
Console.WriteLine(_upDownKeyIsPressed.ToString());
~~Bonnie DeWitt [C# MVP]
http://geek-goddess-bonnie.blogspot.com