Creating Windows Forms at runtime using System.Reflection

[Bisbal]

Hi,

I'd like to know if it is possible to create a form type from a string. My
case: I have a DataTable with forms names (i.e frm_001_UserInf o.cs), and I'd
like to create an instance of that form from my code dynamically, retrieving
the form name from the database.

Something like str = "frm_001_UserIn fo.cs" and then create an instance of
the form using str.

For what I've read about System.Reflecti on, there might be a way to do this,
but I dont know how.

Any help would be greatly appreciated.

Thanks in advance.

[Mohamoss]

RE: Creating Windows Forms at runtime using System.Reflecti on

hi
i think this article on the MSDN can help a lot

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnadvnet/ht

ml/vbnet10082002.a sp
Hope it does
Mohamed Mahfouz
MEA Developer Support Center
ITworx on behalf of Microsoft EMEA GTSC

[avnrao]

Re: Creating Windows Forms at runtime using System.Reflecti on

u can use
System.Reflecti on.Assembly.Get ExecutingAssemb ly().CreateInst ance(formName)

and pass in your form name. but make sure that your form type exists in the
current assembly. If not, you have load the assembly that contains the form
and create an instance of that form.

hth

"Bisbal" <Bisbal@discuss ions.microsoft. com> wrote in message
news:8752B2D4-394A-49D2-AD23-487170C1BDC9@mi crosoft.com...[color=blue]
> Hi,
>
> I'd like to know if it is possible to create a form type from a string. My
> case: I have a DataTable with forms names (i.e frm_001_UserInf o.cs), and[/color]
I'd[color=blue]
> like to create an instance of that form from my code dynamically,[/color]
retrieving[color=blue]
> the form name from the database.
>
> Something like str = "frm_001_UserIn fo.cs" and then create an instance of
> the form using str.
>
> For what I've read about System.Reflecti on, there might be a way to do[/color]
this,[color=blue]
> but I dont know how.
>
> Any help would be greatly appreciated.
>
> Thanks in advance.[/color]

[DavidT]

RE: Creating Windows Forms at runtime using System.Reflecti on

Mohamoss,

I use:

Dim GenericInstance As Object
GenericInstance = Activator.Creat eInstance(TypeT oLoad)

Dim FormToShow As Form = CType(GenericIn stance, Form)

from the example to load a form that does not has parameters in its
constructor, everything work fine.

However, some of our forms need input parameters for the constructor, so I
use the following code:

Dim frm() As Form = {Me} ' Me is the calling form
Dim formActivator As Object = Activator.Creat eInstance(formO bject, frm)

I keep getting the following error message at the above line:

"An unhandled exception of type 'System.Argumen tNullException' occurred in
mscorlib.dll. Additional information: Value cannot be null."

Do you have any ideas what happen

Thanks

DavidT

"Mohamoss" wrote:
[color=blue]
> hi
> i think this article on the MSDN can help a lot
>
> http://msdn.microsoft.com/library/de...us/dnadvnet/ht
> ml/vbnet10082002.a sp
> Hope it does
> Mohamed Mahfouz
> MEA Developer Support Center
> ITworx on behalf of Microsoft EMEA GTSC
>
>[/color]