Help. Program keeps running back to the (stopped/disabled) timer.

Question

I added a "splash screen" to my app (using a form instead of the "splash screen" feature) with a timer on it. When the "splash screen" closes, my frmMain loads. In the first lines of its "Form_Load" event, I stop & disable the timer and disable frmSplashScreen (I tried Unloading frmSplashScreen but it didn't help.)

Moments later in my code, I try to do a FileMove (using various methods), and (during debugging) the first thing the program does is jump back to the timer event in frmSplashScreen.

Why is it doing this? Is there any way to stop it from happening? TIA

Answer 1

Hi

You will need to post code. Code from your first 'splash' form, particularly the Timer code and the code that switched to the next form. Then, you will probably need to post the code dfrom the second form load event.

Please explain what 'and (during debugging) the first thing the program does is jump back to the timer event in frmSplash' actually means. What is first thing.? How do you know it  jumps back to the timer event in frmSplash?

---

Regards Les, Livingston, Scotland

Answer 2

You will need to post code.

---

.
Hey Les, thanks for the reply.

The SplashScreen's code is pretty simple:

Public Class frmSplash
    Dim dblTimer As Double = 0.0

    Private Sub frmSplash_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        tmrSplash.Start()
    End Sub

    Private Sub tmrSplash_Tick(sender As Object, e As EventArgs) Handles tmrSplash.Tick
        dblTimer += 0.1
        If dblTimer > 2.0 Then Me.Opacity -= 0.04
        If Me.Opacity <= 0 Then frmMain.Show()  ' No need to close a form with zero opacity.
    End Sub

    Private Sub picSplash_Click(sender As Object, e As EventArgs) Handles picSplash.Click
        Me.Opacity = 0
    End Sub
End Class

Then in my frmMain:

Private Sub frmMain_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    frmSplash.tmrSplash.Stop()
    frmSplash.tmrSplash.Enabled = False ' Must stop timer so DoEvents doesn't run there.
    frmSplash.Enabled = False

...

My.Computer.FileSystem.CopyFile(Src, Dest) ' Executing this line in the debugger, it instantly jumps back to the Timer event on frmSplashScreen.

Any idea? Thx.

Answer 3

Try setting the timer to Nothing after issuing Stop method.

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Answer 4

Hi

I can't reprofuce your issue. Below is the code I tested with,

The only thing I suspect is that your CopyFile line is throwing an Exception (probably a failure to find the src path)and since it is not handled, would 'jump' back to originating vode (which is where you say it 'jumps' tp)

I suggest adding a Try ...... Catch around the CopyFile line and MessageBox the exception message in the catch.

*

Here is my test code - which works completely normally.

Option Strict On
Option Explicit On
Public Class frmSplash
	Dim dblTimer As Double = 0.0

	Private Sub frmSplash_Load(sender As Object, e As EventArgs) Handles MyBase.Load
		tmrSplash.Start()
	End Sub

	Private Sub tmrSplash_Tick(sender As Object, e As EventArgs) Handles tmrSplash.Tick
		dblTimer += 0.1
		If dblTimer > 2.0 Then Me.Opacity -= 0.04
		If Me.Opacity <= 0 Then frmMain.Show()  ' No need to close a form with zero opacity.
	End Sub

	Private Sub picSplash_Click(sender As Object, e As EventArgs) Handles picSplash.Click
		Opacity = 0
	End Sub
End Class

Option Strict On
Option Explicit On
Public Class frmMain
	Private Sub FrmMain_Load(sender As Object, e As EventArgs) Handles MyBase.Load
		frmSplash.tmrSplash.Stop()
		frmSplash.tmrSplash.Enabled = False
		' Must stop timer so DoEvents doesn't run there.
		frmSplash.Enabled = False

		Dim src As String = "C:\Users\lesha\Desktop\New folder\Plans\Dice 2\11.png"
		Dim dest As String = "C:\Users\lesha\Desktop\New folder (2)\Dice 2\11.png"
		My.Computer.FileSystem.CopyFile(src, dest)
		' Executing this line in the debugger, it instantly jumps back to the Timer even on frmSplashScreen.
	End Sub
End Class

---

Regards Les, Livingston, Scotland

Answer 5

Try setting the timer to Nothing after issuing Stop method.

.
Thanks for the suggestion but it had no effect.

Answer 6

The only thing I suspect is that your CopyFile line is throwing an Exception (probably a failure to find the src path)

.
Thanks for the sample code, but it didn't help.

The CopyFile isn't throwing an exception.

I don't know if it matters, but the CopyFile is being executed from a separate Module inside a Sub routine called "ZipFile":

Public Sub ZipFile(ByVal strDirection As String, Src As String, Dest As String)

It's called from frmMain:

ZipFile("X", strPath & "\Temp\archive.zip", "c:\Target") ' eXtract Src Dest

I could move the entire subroutine from modZip to frmMain but I don't think it would make a difference.

I don't understand at all why executing a CopyFile command would return to a stopped, disabled timer on a disabled form?

Answer 7

Hi

There must be an exception in Form2 which, since I assume it is not being handled, so it permeates back to the calling code - which is the frmMain.Show() in Form1.

To verify, try this in the Timer Tick event:

If Me.Opacity <= 0 Then
    Try
       frmMain.Show()
    Catch ex As Exception
       MessageBox.Show(ex.Message)
    End Try
End If

---

Regards Les, Livingston, Scotland

Answer 8

The only thing I suspect is that your CopyFile line is throwing an Exception (probably a failure to find the src path)

.
I was wrong. It was indeed throwing an exception (determined by placing the CopyFile in a Try.)

The Zip extraction routine was trying to create a folder that already exists. But instead of causing an error or returning to frmMain, it ran back to the (disabled) startup form. Very odd.

Thx.