Windows Form in c# ?

[WJ]

I am using SDI model. How do I check if a Form is already exists in a c#
Windows Application so that I do not have to create another instance,
istead, just doing the "formName.show()" ?

Thanks

John

[Martin Maat [EBL]]

"WJ" <JW***@Msn2.Com> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...

I am using SDI model. How do I check if a Form is already exists in a c#
Windows Application so that I do not have to create another instance,
istead, just doing the "formName.show()" ?

Stringe question... The main SDI Window will be there for the lifetime of
the application. Any additional Window will be created by you and you will
have full control over it. If you feel that disposal and recreation is
expensive, just hang on to your reference.

Martin.

[L#]

On Sun, 1 Feb 2004 15:44:16 -0500, "WJ" <JW***@Msn2.Com> wrote:

I am using SDI model. How do I check if a Form is already exists in a c#
Windows Application so that I do not have to create another instance,
istead, just doing the "formName.show()" ?

Thanks

John

What about:

if (form == null)
form = new Form();
form.Show();
--
Ludwig
mailto:ludwig_(nospamplease)stuyck@pandora(nospamp lease).be

[WJ]

"L#" <ludwig_(nospamplease)stuyck@pandora(nospamplease) .be> wrote in message
news:pq********************************@4ax.com...

if (form == null)
form = new Form();
form.Show();

Yep. That works. Thanks

John

[WJ]

"Martin Maat [EBL]" <du***@somewhere.nl> wrote in message
news:10*************@corp.supernews.com...

Stringe question... The main SDI Window will be there for the lifetime of
the application. Any additional Window will be created by you and you will
have full control over it. If you feel that disposal and recreation is
expensive, just hang on to your reference.

Not strange at all. Sometimes you do not do Dispose() but the object
disappears on you (in a blue moon) anyway, other times you would forget to
call Dispose() and endup filling up all precious RAM. As a result, it is
always a good practice to make sure the thing exists before you reference
it. Otherwise, create it.

John

[Martin Maat [EBL]]

"WJ" <JW***@Msn2.Com> wrote in message
news:uF**************@TK2MSFTNGP09.phx.gbl...

"Martin Maat [EBL]" <du***@somewhere.nl> wrote in message
news:10*************@corp.supernews.com...

Strange question... The main SDI Window will be there for the lifetime of the application. Any additional Window will be created by you and you will have full control over it. If you feel that disposal and recreation is
expensive, just hang on to your reference.

Not strange at all. Sometimes you do not do Dispose() but the object
disappears on you (in a blue moon) anyway.

No, if this were a possibility it would be pointless to write any code. You
should find why this is happening and fix your code.

It seems like you are keeping weak references in some way and then unrightly
expect the object to remain.

Martin.