Where to put code to have it execute only when form actually comes up(i.e. is visible)

  • Thread starter Thread starter BobRoyAce
  • Start date Start date
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BobRoyAce

I have code that I want to execute as soon as the form comes up. This
code includes code that shows a status form indicating processing
activity, a form that immediately closes once the processing activity
is completed. I can't call it from the Load event as it will execute
before the form is visble. Where is the best place to put code like
this? I thought that perhaps the place would be in the VisibleChanged
event. However, if I put it there, it still executes before the form
is visible.
 
BobRoyAce said:
I have code that I want to execute as soon as the form comes up. This
code includes code that shows a status form indicating processing
activity, a form that immediately closes once the processing activity
is completed. I can't call it from the Load event as it will execute
before the form is visble. Where is the best place to put code like
this? I thought that perhaps the place would be in the VisibleChanged
event. However, if I put it there, it still executes before the form
is visible.
Click to expand...

Which .Net version? Since 2.0 you can use the Form's "Shown" event.

If the first Form is not shown modally (ShowDialog), I'd instead use this
code:

firstform.show
secondform.show(dialog)
'if it's in sub main and secondform is shown modally, additionally call
'application.run(firstform) here.

One could also ask, if secondform is shown modally, why not show
secondform first before showing firstform? Firstform isn't operatable anyway
and maybe is also hidden (partially) behind secondform.


Armin
 
I have code that I want to execute as soon as the form comes up. This
code includes code that shows a status form indicating processing
activity, a form that immediately closes once the processing activity
is completed. I can't call it from the Load event as it will execute
before the form is visble. Where is the best place to put code like
this? I thought that perhaps the place would be in the VisibleChanged
event. However, if I put it there, it still executes before the form
is visible.
Click to expand...

You may wish to try "Shown" event.
 
Which .Net version? Since 2.0 you can use the Form's "Shown" event.

Well, would ya look at that...a Shown event! Now that's cool! Never
noticed that one as I was still living in pre-.NET 2.0 way of
thinking, I guess.
If the first Form is not shown modally (ShowDialog), I'd instead use this
code:

firstform.show
secondform.show(dialog)
Click to expand...

That's what I'm doing...
One could also ask, if secondform is shown modally, why not show
secondform first before showing firstform? Firstform isn't operatable anyway
and maybe is also hidden (partially) behind secondform.
Click to expand...

Good point except that, in this case, secondform is not only shown
modally when firstform has loaded. It's also shown modally when user
clicks on certain buttons on the form itself.
 
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