How to use a Dispatch Timer

Question

How can I have a Dispatch Timer run continuously in the background and not have the app frozen? I want to still be able to use the app with the timer on. I'm a beginner, so any help? Thanks!

Answer 1

A DispatcherTimer will run only when the app is running, not when it is suspended. You can set it up with an Interval to control how often it should call its Tick delegate. Here's a code snippet to call the TimerTick function approximately every second:

        Dim timer As New DispatcherTimer()
        timer.Interval = TimeSpan.FromSeconds(1)
        AddHandler timer.Tick, AddressOf TimerTick
        timer.Start()

For test purposes, TimerTick will update a counter and tell us how many times it has been called:

    Private Sub TimerTick(sender As Object, e As Object)
        numTicks = numTicks + 1
        outputField.Text = numTicks
    End Sub

--Rob

Answer 2

Thanks!