Forms never going out of scope

[fosterm]

Hi all

I'm tearing my hair out trying to find out why my forms won't go out of scope..

For example

My code is

Dim objform as frmProductEdit

Set objform = new frmproductEdit

ObjForm.showdialog

'Then - when the form is closed by user

objform = nothing

I'm using the .net memory profiler and the number of live instances of a form does not decrease when i close the form

Therefore pretty soon, my app starts to struggle for memory as the product form is opened a number of times

I've tried using objform.dispose before setting it nothing and calling garbage collection but nothing seems to kill off the form instance

Any ideas on what i'm doing wrong. I'm pretty new to .net from vb6

Cheers

MArk

 

[ThatRickGuy]

.Net uses a garbage collector that will release memory as it is needed. So if you .dispose your form and set it to nothing, it will still be in memory until the garbage collector decides that it needs more memory.

I think Chiph may have posted a way to force the GC to collect everything, but I can't recall what the solution was.

-Rick

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I believe in killer coding ninja monkeys.

 

[fosterm]

Thanks for your help

The trouble is I can see clearly on the memory profiler where garbage collections have taken place but the form stays a live instance

I've tried doing forced collections with gc.collect but the damm things won't die

 

[ThatRickGuy]

gc.collect forces the garbage collector to run, but does not force memory to be released.

Are there COM components on the form that could be causing the issue?

-Rick

VB.Net Forum forum796 forum855 ASP.NET Forum
I believe in killer coding ninja monkeys.

 

[fosterm]

I do have some com components on other forms elsewhere in the project but not on the one I'm testing at the moment

There's a few standard windows forms controls, Janus explorer bar for .net and a custom textbox control i made myself

I'm wondering if the custom textbox could be the problem. Basically it was just a control I made with a standard textbox on it with a few extra properties added that were relevant to my app

Is it possible that the textbox inside each instance of my custom control is making the form stay alive ?

As you can probably tell, all this gc stuff is pretty new to me !

 

[ThatRickGuy]

You could add lines to set your textbox and the Janus bar to nothing in the form's .dispose method. I don't know if that will fix this issue or not though.

-Rick

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I believe in killer coding ninja monkeys.