The following code is a simple elapsed time counter.
I want to change the Timer_Control.Interval property during
run t ime during a Button_Click event handler.
Can this be done
I also would like to initialize the counter when the VB
program starts. I don't know where to put any initialization code.
Public Class Form1
Private MyStartTime As DateTime = Now()
Private MyEndTime As DateTime = Now()
Private MyTimeSpan As TimeSpan
I would like to add code here to initialize timer.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button1.Click
I would like to add code here to change Timer_Control Interval or Enabled properties.
End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
MyStartTime = MyEndTime
MyEndTime = Now()
MyTimeSpan = MyEndTime.Subtract(MyStartTime)
Label1.Text = MyStartTime
Label2.Text = MyEndTime
Label3.Text = MyTimeSpan.ToString
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
I would like to add code here to initilize timer.
End Sub
End Class
TimerControl_Interval Property
SamScratch
The name of the sub is unimportant its whats after the handles keyword that is important.
So you could for example call you sub XYZanything
Private Sub XYZanything(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
MyStartTime = MyEndTime
MyEndTime = Now()
MyTimeSpan = MyEndTime.Subtract(MyStartTime)
Label1.Text = MyStartTime
Label2.Text = MyEndTime
Label3.Text = MyTimeSpan.ToString
End Sub
The handles timer1.tick is what hooks this sub up to the Timer1 controls tick event.
The default names that VB tries to give controls is based upon the control and event but if you create a sub and then change the control name. You'll notice that the handles will reflect the new name of the control but the sub name wont change and therefore the example above where the sub is called XYZanything.
emates
I found my problem with your help.
If you look at the event handler for the timer_control , the name of the sub is
Timer1_tick which VB assigned . I thought the name for the timer_control was the name of the sub ; however,the name for the timer is Timer1.
Do you know what the _tick signifies
I thought about the _tick. It's the name of the event.
Thanks
Lee.NET
Sure you can chnage the timer interval property at run time.
simply put
Timer1.Interval = <Value in MS>
For a counter you may define a class level variable
private Counter as long = 0
or you could define a class level variable
Private Counter as long
and in the form load set its intial value
Counter = 0
Then in the timer tick event add something like
counter +=1
this will increment the counter every time the the tick event is run.
Then the elapsed time will be counter * timer1.interval
EvanstonIl
I am just begining to learn VB express
Thanks for the reply which makes sense.