Why can't you inherit System.Windows.Forms.Form?

The designer doesn't seem to like it but the question is why was it designed
like this?

Cheers, Rob.

PS. And can you do it in VS 2005?

Herfried
Sat Feb 04 07:34:19 CST 2006

"Rob Nicholson" <rob.nicholson@nospam_unforgettable.com> schrieb:
> The designer doesn't seem to like it but the question is why was it
> designed like this?

You actually can make a form inherit from 'System.Windows.Forms.Form',
that's what is actually done when adding a new form to the project.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

Rob
Sun Feb 05 05:54:08 CST 2006

> You actually can make a form inherit from 'System.Windows.Forms.Form',
> that's what is actually done when adding a new form to the project.

But you can't put an intermediate inherited class in the way though. You can
on ASP.NET - we have our own MyApp.Page class which is ineffect the equiv.
of the form.

Cheers, Rob.

Herfried
Sun Feb 05 06:09:21 CST 2006

"Rob Nicholson" <rob.nicholson@nospam_unforgettable.com> schrieb:
>> You actually can make a form inherit from 'System.Windows.Forms.Form',
>> that's what is actually done when adding a new form to the project.
>
> But you can't put an intermediate inherited class in the way though. You
> can on ASP.NET - we have our own MyApp.Page class which is ineffect the
> equiv. of the form.

You can create a class which inherits from 'Form' and a second class which
inherits from your custom form class ("Project" -> "Add inherited form...").

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

Bob
Sun Feb 05 07:26:43 CST 2006

Take a look at the ideas of Visual Inheritance.

--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm

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http://www.bobpowell.net/faqmain.htm

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"Rob Nicholson" <rob.nicholson@nospam_unforgettable.com> wrote in message
news:%23ovSfrkKGHA.3732@TK2MSFTNGP10.phx.gbl...
>> You actually can make a form inherit from 'System.Windows.Forms.Form',
>> that's what is actually done when adding a new form to the project.
>
> But you can't put an intermediate inherited class in the way though. You
> can on ASP.NET - we have our own MyApp.Page class which is ineffect the
> equiv. of the form.
>
> Cheers, Rob.
>

Patrice
Mon Feb 06 07:01:03 CST 2006

What is the behavior you see ? This is what the designer always do when you
create a form ! Should work.

--
Patrice

"Rob Nicholson" <rob.nicholson@nospam_unforgettable.com> a écrit dans le
message de news:%23QjQHaYKGHA.648@TK2MSFTNGP14.phx.gbl...
> The designer doesn't seem to like it but the question is why was it
designed
> like this?
>
> Cheers, Rob.
>
> PS. And can you do it in VS 2005?
>
>

Bruce
Mon Feb 06 15:06:04 CST 2006


Rob Nicholson wrote:
> > You actually can make a form inherit from 'System.Windows.Forms.Form',
> > that's what is actually done when adding a new form to the project.
>
> But you can't put an intermediate inherited class in the way though. You can
> on ASP.NET - we have our own MyApp.Page class which is ineffect the equiv.
> of the form.
>
> Cheers, Rob.

Is the "intermediate inherited class" abstract, by any chance?

Peter
Tue Feb 07 12:11:16 CST 2006

Not sure what you mean. This works, I do it all the time:

ref class MyForm : public Form
{
MyForm() : Form() {}
} ;

even:

ref class MyDerivedForm : public MyForm
{
MyDerivedForm() : MyForm() {}
} ;

Note that 'Form' is 'System.Windows.Forms.Form', but I use 'using' to avoid
excessive typing... : )

[==P==]

"Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
news:uwwLr%23YKGHA.4044@TK2MSFTNGP10.phx.gbl...
> "Rob Nicholson" <rob.nicholson@nospam_unforgettable.com> schrieb:
>> The designer doesn't seem to like it but the question is why was it
>> designed like this?
>
> You actually can make a form inherit from 'System.Windows.Forms.Form',
> that's what is actually done when adding a new form to the project.
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://classicvb.org/petition/>

Rob
Thu Feb 09 19:19:25 CST 2006

> You can create a class which inherits from 'Form' and a second class which
> inherits from your custom form class ("Project" -> "Add inherited
> form...").

Ahh ha - that was the missing link. I was simply trying to create a base
class that was normal class, not a form which is then inherited. Works a
treat.

Thanks, Rob.