Child form calling a method on it's parent's class.

I am developing a form-based application. There is one root
form called "Application" and a few child forms off the root (e.g.,
Login, CustView). I would like the sibling forms to be able to pass
contol to each other (e.g., after successful login, I want to make
Login invisible and CustView visible).
I wanted the root form to control this interaction, but I'm
not sure how events in child can be handled in the parent. This is
a common technique, but in this case, the parent doesn't explicitly
instantiate the child, so I can't just pass a reference to the
parent to the child's constructor. I can use this.parentForm to get
a reference to the parent form, but I can't seem to find the
parent's methods, just it's gui elements (i.e.,
this.parentForm.parentMethod() doesn't work).
Can some tell me how to do this? I am considering a
FormManager class, which is a singleton class that each form can
registers with and can use to toggle the visibility of itself and
its siblings, but I wanted to see if there was an easier way to
access methods on the class instance associated a parent's form.
Any suggestions?
Andy

"agorman" <[email protected]> wrote in
message
news:e2163h$4na$[email protected]..
>I am developing a form-based application. There is one
root form called
> "Application" and a few child forms off the root (e.g.,
Login, CustView).
> I
> would like the sibling forms to be able to pass contol
to each other
> (e.g.,
> after successful login, I want to make Login invisible
and CustView
> visible).
>
> I wanted the root form to control this interaction, but
I'm not sure how
> events in child can be handled in the parent. This is a
common technique,
> but
> in this case, the parent doesn't explicitly instantiate
the child, so I
> can't
> just pass a reference to the parent to the child's
constructor. I can use
> this.parentForm to get a reference to the parent form,
but I can't seem to
> find
> the parent's methods, just it's gui elements (i.e.,
> this.parentForm.parentMethod() doesn't work).
>
> Can some tell me how to do this? I am considering a
FormManager class,
> which
> is a singleton class that each form can registers with
and can use to
> toggle
> the visibility of itself and its siblings, but I wanted
to see if there
> was an
> easier way to access methods on the class instance
associated a parent's
> form.
>
> Any suggestions?
>
Why don't you explicitly instantiate the children with a
reference to the
parent form. That way you could store the reference in the
constructor. As
long at the functions are public I think it should work.
Amy

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