trigger event after X seconds

Question

I am developing an app for windows phone. My question is how can I trigger an event after 2 seconds?

    Private Sub btn1_Click(sender As Object, e As RoutedEventArgs) Handles btn1.Click
    Dim input As String = txtinput.Text
    Dim last As Char = input(input.Length - 1)
    If last = "A" Then
        Dim final As String = input.Substring(0, input.Length - 1) & "B"c
        txtinput.Text = final.

      'start timer here
      'trigger an event after 2 seconds

    ElseIf last = "B" Then
        Dim final As String = input.Substring(0, input.Length - 1) & "C"c
        Dim tmr As TimeSpan = TimeSpan.FromSeconds(2)
        txtinput.Text = final

      'start timer here
      'trigger an event after 2 seconds


    Else
        txtinput.Text = input + "A"
    End If

 End Sub

I am using Visual Basic as my language in developing this. Any help would be much appreciated.

What UI framework are you developing under? Does it not have a timer? — Jeff B, Nov 02 '12 at 13:37
Yes, but are you using WinForms, WPF, Silverlight, etc...? For example, if you are using WinForms, there's a Timer in your toolbox you can drag onto your form. Then you just call `.Start()` on it and handle it's `Tick` event. — Jeff B, Nov 02 '12 at 13:44
oh sorry, i am using windows phone application in visual studio express 2012.. — clydewinux, Nov 02 '12 at 13:47
see the post http://stackoverflow.com/questions/3265715/is-there-a-timer-control-for-windows-phone-7 — techBeginner, Nov 02 '12 at 13:59

score 2 · Accepted Answer · edited May 23 '17 at 11:45

2

declare dispatcherTimer inside the class

Dim WithEvents dt As System.Windows.Threading.DispatcherTimer

then create instance of dispatcherTimer whereever you want, set time span

dt = New System.Windows.Threading.DispatcherTimer()
dt.Interval = New TimeSpan(0, 0, 0, 0, 500) '' 500 Milliseconds
dt.Start()

and here is your handler

Private Sub dt_Tick(ByVal sender As Object, ByVal e As EventArgs) Handles dt.Tick
    ' Do Stuff here.
End Sub

*converted code to VB from here, though I have not tested it..it may work for you..

edited May 23 '17 at 11:45

Community

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answered Nov 02 '12 at 14:20

techBeginner

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thank you so much. this code works the way what I want to happen. Thanks again.. :-) – clydewinux Nov 02 '12 at 14:34

score 0 · Answer 2 · answered Nov 02 '12 at 13:53

0

Maybe I just don't know the environment because I have never programmed for phones in .Net, but what about:

System.Threading.Thread.Sleep(2000)

Hope this helps

answered Nov 02 '12 at 13:53

John Bustos

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That might cause the application to "freeze" for 2 seconds if it is done on the UI thread. – Jeff B Nov 02 '12 at 14:34

trigger event after X seconds

2 Answers2