CODEWITHSUNDEEP
vb.nettimercountdowntimer
Marc Intes
Marc Intes

Reputation: 737

VB.net real-time time elapsed feature

I already have created a real time clock that synchronizes with the computer time and is being displayed in a label.

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Timer1.Enabled = True
End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    Time.Text = Date.Now.ToString("h:mm:ss tt")
End Sub

I want to make a real-time time elapsed feature that keeps on counting the seconds/minutes/hours elapsed from the time it started till the time it stops and it would be basing on the real-time clock i have created. I would be creating a start and stop button for this. Is this possible? Thanks in advance.

I am now able to complete everything and i added a feature that records the starting and ending time based on my real time clock. Here is my working code:

Dim hr, min, sec As Integer

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Timer1.Enabled = True
End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    Time.Text = Date.Now.ToString("h:mm:ss tt")
End Sub

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click

    Start.Text = ""
    EndLbl.Text = ""
    Elapse.Text = ""
    Timer2.Enabled = True
    Start.Text = Time.Text
End Sub

Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick

    sec = sec + 1
    If (sec = 60) Then
        sec = 0
        min = min + 1
    ElseIf (min = 60) Then
        min = 0
        hr = hr + 1
    ElseIf (hr = 24) Then
        hr = 0
        min = 0
        sec = 0
    End If

    Elapse.Text = String.Format("{0}hr : {1}min : {2}sec", hr, min, sec)
    Timer2.Interval = 1000
End Sub

Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
    Timer2.Enabled = False
    EndLbl.Text = Label4.Text

    hr = 0
    min = 0
    sec = 0
    Timer2.Interval = 1
End Sub

Credits to the starting code given by NeverHopeless. Thanks alot.

Upvotes: 4

Views: 34633

Answers (3)

dbasnett
dbasnett

Reputation: 11773

An example for displaying the elapsed time the application has run.

Public Class Form1
    'shows elapsed time that the app has run
    '
    Dim elapTimer As New Threading.Timer(AddressOf tick, Nothing, 1000, 1000)
    Dim stpw As Stopwatch = Stopwatch.StartNew

    Private Sub tick(state As Object)
        If stpw.IsRunning Then
            'format - http://msdn.microsoft.com/en-us/library/ee372287.aspx
            Me.Invoke(Sub()
                          Label1.Text = stpw.Elapsed.ToString("d\ \ hh\:mm\:ss\.ff")
                      End Sub)
        End If
    End Sub

End Class

To add start/stop functionality using buttons:

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    'start the elapsed timer
    stpw.Start() 'continue 
    'or
    'stpw.Restart() 'restart
End Sub

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
    stpw.Stop()
End Sub

Upvotes: 3

George
George

Reputation: 384

I suggest you use only 1 timer:

Public Class Form2

Private _elapseTimerRunning As Boolean = False
Private _elapseStartTime As DateTime

Private Sub Form2_Load(sender As Object, e As EventArgs) Handles Me.Load
    Timer1.Interval = 1000
    Timer1.Enabled = True
End Sub

Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
    txtTime.Text = Now.ToString("h:mm:ss tt")
    If _elapseTimerRunning = True Then
        Dim elapsedtime = DateTime.Now.Subtract(_elapseStartTime)
        txtElapsed.Text = String.Format("{0}hr : {1}min : {2}sec", elapsedtime.Hours, elapsedtime.Minutes, elapsedtime.Seconds)
    End If
End Sub

Private Sub btnStart_Click(sender As Object, e As EventArgs) Handles btnStart.Click
    _elapseStartTime = DateTime.Now
    _elapseTimerRunning = True
End Sub

Private Sub btnStop_Click(sender As Object, e As EventArgs) Handles btnStop.Click
    _elapseTimerRunning = False
End Sub

End Class

Upvotes: 9

NeverHopeless
NeverHopeless

Reputation: 11233

Something like this would help you: (untested, but will give you a starter)

Dim hr, min, sec As Integer 'msec;

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Timer1.Enabled = True
    Timer2.Enabled = True
End Sub

Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    'msec++;
    'if(msec == 60)  { msec = 0; sec++; }

    sec+=1;
    if(sec  = 60) Then 
      sec = 0 : min+=1
    end if
    if(min  = 60) Then
      min = 0 : hr+=1
    end if
    if(hr = 24)  Then
      hr  = 0 : min = 0 : sec = 0
    end if   

    'TimeElapsed.Text = String.Format("{0}:{1}:{2} {3}", hr, min, sec, msec)
     TimeElapsed.Text = String.Format("{0}:{1}:{2}", hr, min, sec) 
End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    Time.Text = Date.Now.ToString("h:mm:ss tt")
End Sub

NOTE: Timer2 will run for every second.

Upvotes: 1

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