custom control StackOverflowException

[éric]

I have managed to create my custom control and I can add the dll to the
toolbar in a project no problem.

When I add it to the form however I get a StackOverflowException error.

I am not sure where to begin to figure out this error... any ideas?

I have an override for the OnResize event which then calls this.Invalidate()
I thought this was it but when I compile without this.Invalidate() I get the
same errors.

Regards,

éric

 

[Chris Tacke, eMVP]

You've got some sort of recursion going on - probably something in an
eventhandler that in turn causes the even to refire.

-Chris

 

[éric]

Is there a way for me to step through the code causing the error?

Regards,
éric

 

[Alex Feinman [MVP]]

Actually, what you want to do is to reach the exception under debugger and
look at the Stack window. When doing this, right-click on the stack window
and check "Show non-user code". YOu should be able to see clearly a
repeating pattern of function calls, which will give you an idea of what is
going wrong

 

[éric]

Hi Alex, thanks for your reply

I am not sure if I understand what you are saying...
The "Call Stack Window" is only available when the application is running in
debug mode.
The problem is I can not even add the control to the form... the error comes
imediatly when I try to place the control on the form.
The control never makes it to the form in the designer and so I can not view
anything in the "Call Stack Window".

What am I missing?

éric

 

[Alex Feinman [MVP]]

Sorry, didn't realize you were talking about the designtime
I think you should be able to launch a second instance of VStudio and attach
to the first one, thus being able to catch the exception in the debugger

Hi Alex, thanks for your reply

I am not sure if I understand what you are saying...
The "Call Stack Window" is only available when the application is running in
debug mode.
The problem is I can not even add the control to the form... the error comes
imediatly when I try to place the control on the form.
The control never makes it to the form in the designer and so I can not view
anything in the "Call Stack Window".

What am I missing?

éric

Actually, what you want to do is to reach the exception under debugger and
look at the Stack window. When doing this, right-click on the stack window
and check "Show non-user code". YOu should be able to see clearly a
repeating pattern of function calls, which will give you an idea of what is
going wrong

Is there a way for me to step through the code causing the error?

Regards,
éric

"Chris Tacke, eMVP" <ctacke[at]Open_NET_CF[dot]org> wrote in message
You've got some sort of recursion going on - probably something in an
eventhandler that in turn causes the even to refire.

-Chris


I have managed to create my custom control and I can add the dll

to
the

toolbar in a project no problem.

When I add it to the form however I get a StackOverflowException error.

I am not sure where to begin to figure out this error... any ideas?

I have an override for the OnResize event which then calls
this.Invalidate()
I thought this was it but when I compile without this.Invalidate()

I
get

the
same errors.

Regards,

éric

 

[éric]

Can I assume that the problem is in or called by my constructor?

Sorry, didn't realize you were talking about the designtime
I think you should be able to launch a second instance of VStudio and attach
to the first one, thus being able to catch the exception in the debugger

Hi Alex, thanks for your reply

I am not sure if I understand what you are saying...
The "Call Stack Window" is only available when the application is

running

in
debug mode.
The problem is I can not even add the control to the form... the error comes
imediatly when I try to place the control on the form.
The control never makes it to the form in the designer and so I can not view
anything in the "Call Stack Window".

What am I missing?

éric

Actually, what you want to do is to reach the exception under debugger and
look at the Stack window. When doing this, right-click on the stack window
and check "Show non-user code". YOu should be able to see clearly a
repeating pattern of function calls, which will give you an idea of

what
is

going wrong

Is there a way for me to step through the code causing the error?

Regards,
éric

"Chris Tacke, eMVP" <ctacke[at]Open_NET_CF[dot]org> wrote in message
You've got some sort of recursion going on - probably something in an
eventhandler that in turn causes the even to refire.

-Chris


I have managed to create my custom control and I can add the dll to
the
toolbar in a project no problem.

When I add it to the form however I get a StackOverflowException
error.

I am not sure where to begin to figure out this error... any ideas?

I have an override for the OnResize event which then calls
this.Invalidate()
I thought this was it but when I compile without

this.Invalidate()

I

 

[Alex Feinman [MVP]]

Not necessarily - it could be one of the member functions

Can I assume that the problem is in or called by my constructor?

Sorry, didn't realize you were talking about the designtime
I think you should be able to launch a second instance of VStudio and attach
to the first one, thus being able to catch the exception in the debugger

Hi Alex, thanks for your reply

I am not sure if I understand what you are saying...
The "Call Stack Window" is only available when the application is

running

in
debug mode.
The problem is I can not even add the control to the form... the error comes
imediatly when I try to place the control on the form.
The control never makes it to the form in the designer and so I can

not
view

anything in the "Call Stack Window".

What am I missing?

éric

Actually, what you want to do is to reach the exception under

debugger
and

look at the Stack window. When doing this, right-click on the stack window
and check "Show non-user code". YOu should be able to see clearly a
repeating pattern of function calls, which will give you an idea of what
is
going wrong

Is there a way for me to step through the code causing the error?

Regards,
éric

"Chris Tacke, eMVP" <ctacke[at]Open_NET_CF[dot]org> wrote in message
You've got some sort of recursion going on - probably something

in
an

eventhandler that in turn causes the even to refire.

-Chris


I have managed to create my custom control and I can add the

dll
to

the
toolbar in a project no problem.

When I add it to the form however I get a StackOverflowException
error.

I am not sure where to begin to figure out this error... any ideas?

I have an override for the OnResize event which then calls
this.Invalidate()
I thought this was it but when I compile without

this.Invalidate()

I
get
the
same errors.

Regards,

éric

 

[éric]

I found out what it was but I can't explain it
this line is what messes it up... why? (conditional statement prevents the
StackOverflowException error)
#if !NETCFDESIGNTIME
lblDLStatus.Parent = pnllblDLStatus;
#endif
I put the conditions to avoid the problem in design time... but why does
this cause an error when this line is in the constructor?

Now my problem is 2 fold... without that line the design time does not look
exactly as it should
Second and most important I get the following error when I run the app with
my control:
--------------------------------
TypeLoadException
Could not load type
System.Windows.Froms.Panel from
assembly System.Windows.Forms,
Version = 1.0.5000.0, Culture = neutral
PublickKeyToken=B77A5C561934E089

 

[Alex Yakhnin, MVP]

Do you have any code in the OnParentChanged event override?

 

[éric]

I have these 3 functions when it comes to paint

override OnResize
override OnPaint
pnllblDLStatus_Paint

The thing is, I get the same StackOverflowException even when I remove all
three functions from my code

éric

 

[éric]

Thanks for your time Alex... I have decided to not use that panel and paint
the item I need.
I don't get errors that way...
Regards,

éric