I use 3-d party component. In this component I must pass a reference to my
object. The problem is that this component has an ugly bug.When this
component is disposed, it incorrectly don't delete the reference to my
object from one of its shared lists.And since the operation repeats many
times the leak is huge.
Is there a way to kill my object anyway?
Thanks a lot,
Boni
13  1523 
"Boni" <oilia@nospam > wrote in message
news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. I use 3-d party component. In this component I must pass a reference to my
object. The problem is that this component has an ugly bug.When this
component is disposed, it incorrectly don't delete the reference to my
object from one of its shared lists.And since the operation repeats many
times the leak is huge.
Is there a way to kill my object anyway?
Thanks a lot,
Boni
You should contact that 3rd party provider.... have you tried passing a
reference to Nothing? Depending on how that 3rd party component works,
passing a ref to Nothing may clear the circular dependency.... then again,
it may raise an error (which you should be able to trap)
--
Ken Halter - MS-MVP-VB (visiting from VB6 world) - http://www.vbsight.com
Please keep all discussions in the groups..
The 3-d party provider is Microsoft :). I am speeking about a memory leak
when I create a context menue items dynamically
( http://weblogs.asp.net/pwilson/archi...20/77451.aspx). They are not
disposed until the form is disposed.
It is documented bug and there is a workaround for that (using reflection).
But in general, somehow I don't see the reason of garbadge collection.
Before I started with it I was sure that it completely solve all memory leak
problems. But it seems, that it creates a new class of memory leak problems,
where you must think very much about all your references. And even then
there is no insurance that something went wrong because of 3-d party bugs.
I mean, .NET is a perfect libruary, easy to use. But the memory leak problem
should be revised once more. Currently there is even no appropriate software
which can automatically check those bug's (a-la bounds checker). For me
there was no problem to kill all created objects myself in c++. There are
coding guidlines and problem is quite managable. But in .NET I spend all my
time by looking for memory leaks, it is even more time then debugging. And I
am still not sure, when the debug level is acceptable.
Is it only my problem or all of you have it too?
"Ken Halter" <Ken_Halter@Use _Sparingly_Hotm ail.com> schrieb im Newsbeitrag
news:u4******** ******@tk2msftn gp13.phx.gbl... "Boni" <oilia@nospam > wrote in message
news:%2******** ********@TK2MSF TNGP10.phx.gbl. ..I use 3-d party component. In this component I must pass a reference to my
object. The problem is that this component has an ugly bug.When this
component is disposed, it incorrectly don't delete the reference to my
object from one of its shared lists.And since the operation repeats many
times the leak is huge.
Is there a way to kill my object anyway?
Thanks a lot,
Boni
You should contact that 3rd party provider.... have you tried passing a
reference to Nothing? Depending on how that 3rd party component works,
passing a ref to Nothing may clear the circular dependency.... then again,
it may raise an error (which you should be able to trap)
--
Ken Halter - MS-MVP-VB (visiting from VB6 world) - http://www.vbsight.com
Please keep all discussions in the groups..
I saw the fix below in one of the MIcrosoft articles for MainMenu (they
apparently can also have the same memory leak problems as Context Menus so I
would assume this fix would also apply them them as well but not sure)
For any forms that have MainMenu components, add the following code to make
sure the components are disposed of correctly:
Protected Override Sub Dispose(disposi ng as boolean)
If disposing
If not components is Nothing
components.Disp ose()
components = Nothing
If not mainMenu1 is Nothing
‘Code to add
mainMenu1.Dispo se()
mainMenu1 = Nothing
base.Dispose(di sposing)
End If
End If
End If
--
Dennis in Houston
"Boni" wrote: The 3-d party provider is Microsoft :). I am speeking about a memory leak
when I create a context menue items dynamically
(http://weblogs.asp.net/pwilson/archi...20/77451.aspx). They are not
disposed until the form is disposed.
It is documented bug and there is a workaround for that (using reflection).
But in general, somehow I don't see the reason of garbadge collection.
Before I started with it I was sure that it completely solve all memory leak
problems. But it seems, that it creates a new class of memory leak problems,
where you must think very much about all your references. And even then
there is no insurance that something went wrong because of 3-d party bugs.
I mean, .NET is a perfect libruary, easy to use. But the memory leak problem
should be revised once more. Currently there is even no appropriate software
which can automatically check those bug's (a-la bounds checker). For me
there was no problem to kill all created objects myself in c++. There are
coding guidlines and problem is quite managable. But in .NET I spend all my
time by looking for memory leaks, it is even more time then debugging. And I
am still not sure, when the debug level is acceptable.
Is it only my problem or all of you have it too?
"Ken Halter" <Ken_Halter@Use _Sparingly_Hotm ail.com> schrieb im Newsbeitrag
news:u4******** ******@tk2msftn gp13.phx.gbl... "Boni" <oilia@nospam > wrote in message
news:%2******** ********@TK2MSF TNGP10.phx.gbl. ..I use 3-d party component. In this component I must pass a reference to my
object. The problem is that this component has an ugly bug.When this
component is disposed, it incorrectly don't delete the reference to my
object from one of its shared lists.And since the operation repeats many
times the leak is huge.
Is there a way to kill my object anyway?
Thanks a lot,
Boni
You should contact that 3rd party provider.... have you tried passing a
reference to Nothing? Depending on how that 3rd party component works,
passing a ref to Nothing may clear the circular dependency.... then again,
it may raise an error (which you should be able to trap)
--
Ken Halter - MS-MVP-VB (visiting from VB6 world) - http://www.vbsight.com
Please keep all discussions in the groups..
> The 3-d party provider is Microsoft :). I am speeking about a memory leak when I create a context menue items dynamically
The logic below works for me with context menus built by my programs:
Dim cm As ContextMenu
' your code goes here to create cm including click event handler(s)
cm.Show(up to you, up to you)
Application.DoE vents() ' needed to raise and process the click event
cm.Dispose() ' required, else memory leak
Boni,
What do you think that dispose does?
Cor
Hi Amerser,
Why are u so sure? Have you checked with a profiler. This logic don't works
because of MS bug (in .NET 1.1.). There is still a static reference inside
of form (which you didn't created), but .NET did. So your cm will not be
disposed untill a form is disposed. Hope I don't disappoint you:). Take a
profiler and look yourself.
"AMercer" <AM*****@discus sions.microsoft .com> schrieb im Newsbeitrag
news:32******** *************** ***********@mic rosoft.com... The 3-d party provider is Microsoft :). I am speeking about a memory leak
when I create a context menue items dynamically
The logic below works for me with context menus built by my programs:
Dim cm As ContextMenu
' your code goes here to create cm including click event handler(s)
cm.Show(up to you, up to you)
Application.DoE vents() ' needed to raise and process the click event
cm.Dispose() ' required, else memory leak
Wellcome in club you have the same memory leak, but you don't know about it.
"AMercer" <AM*****@discus sions.microsoft .com> schrieb im Newsbeitrag
news:32******** *************** ***********@mic rosoft.com... The 3-d party provider is Microsoft :). I am speeking about a memory leak
when I create a context menue items dynamically
The logic below works for me with context menus built by my programs:
Dim cm As ContextMenu
' your code goes here to create cm including click event handler(s)
cm.Show(up to you, up to you)
Application.DoE vents() ' needed to raise and process the click event
cm.Dispose() ' required, else memory leak
Hi Cor, hi all,
I know about dispose and try to explicitely call it, but as you see, for
examle with context menus this don't prevent memory leak.
In general,my point is following.
IMHO it is much harder to find memory leaks in .NET. There are no tools for
this, and application don't crash. I miss a possibility to find such bugs.
(profiler can't really help if your app creates and disposed many objects,
you can't manually filter out correced objects from leaked objects. A have
programmed many years C++ and there are programming rules and tools which
allow to minimize memory leak (in my whole carrier the leak finding time was
not higher then a development time). But in .NET it is very hard to attack
memory leak problems. This is absolutely manual and time consuming process,
which kills .NET productivity win. The problem in .NET is even bigger
(IMHO), then in unmanaged code. If you don't deleted only 1 reference the
whole chain of objects can stay undeleted and you will even NOT notice it.
I think, that we need some possibility, at least to automatically detect
exact point of memory leaks. (but so far I have no idea how it would be
possible)
Are you agree with me or is it only my problem and nobody except me has it.
Thanks a lot for your opinions,
"Cor Ligthert [MVP]" <no************ @planet.nl> schrieb im Newsbeitrag
news:Of******** ******@TK2MSFTN GP11.phx.gbl... Boni,
What do you think that dispose does?
Cor
Just a tip, when I suspect an object for memory leak, I do a simple program
to test it, within a for i as integer = 0 to 10000 or something, so you can
see if that is really the object causing the problem..
- Fredrik
"Boni" <oilia@nospam > wrote in message
news:O7******** ******@TK2MSFTN GP11.phx.gbl... Hi Cor, hi all,
I know about dispose and try to explicitely call it, but as you see, for
examle with context menus this don't prevent memory leak.
In general,my point is following.
IMHO it is much harder to find memory leaks in .NET. There are no tools
for this, and application don't crash. I miss a possibility to find such
bugs. (profiler can't really help if your app creates and disposed many
objects, you can't manually filter out correced objects from leaked
objects. A have programmed many years C++ and there are programming rules
and tools which allow to minimize memory leak (in my whole carrier the
leak finding time was not higher then a development time). But in .NET it
is very hard to attack memory leak problems. This is absolutely manual and
time consuming process, which kills .NET productivity win. The problem in
.NET is even bigger (IMHO), then in unmanaged code. If you don't deleted
only 1 reference the whole chain of objects can stay undeleted and you
will even NOT notice it.
I think, that we need some possibility, at least to automatically detect
exact point of memory leaks. (but so far I have no idea how it would be
possible)
Are you agree with me or is it only my problem and nobody except me has
it.
Thanks a lot for your opinions,
"Cor Ligthert [MVP]" <no************ @planet.nl> schrieb im Newsbeitrag
news:Of******** ******@TK2MSFTN GP11.phx.gbl... Boni,
What do you think that dispose does?
Cor
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