Called A Function in Array Of MDI Child Forms

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Daniel Friend - 07 Sep 2004 21:05 GMT

I have a bunch of mdi child forms and I use a collection for which forms are
opened. I would like to call a public function in the open forms called
ChangeFormat, but I am getting the following error:

'ChangeFormat' is not a member of 'System.Windows.Forms.Form'.

Can somebody tell me how I can achieve this?

Thanks,

Dan

Example Code:
----------------------------------------------------------------------

Public Sub ChangeFormat()
Try
Dim frmAny As Form
For Each frmAny In Forms
Try
frmAny.ChangeFormat()
Catch
End Try
Next
Catch ex As Exception
End Try
End Sub

Reply to this Message

Herfried K. Wagner [MVP] - 07 Sep 2004 21:35 GMT

* "Daniel Friend" <dan@donotspam.com> scripsit:

> I have a bunch of mdi child forms and I use a collection for which forms are
> opened. I would like to call a public function in the open forms called
[quoted text clipped - 8 lines]
> Try
> frmAny.ChangeFormat()

Replace the line above with this:

\\\
DirectCast(frmAny, AnyForm).ChangeFormat()
///

'AnyForm' is the type of your MDI children.

Signature

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

Reply to this Message

Daniel Friend - 07 Sep 2004 22:05 GMT

What if there are about 50 types of MDI children and you don't know which
one for need to change? I tried the following code to get the type, but I
get an error:
"aType is not defined"

Thanks for your help,

Dan

Public Sub ChangeFormat()
Try
Dim frmAny As Form
For Each frmAny In Forms
Dim aType As Type
aType = frmAny.GetType
Try
DirectCast(frmAny, aType).GetTheme()
Catch ex As Exception
End Try
Next
End Try
End Sub

> * "Daniel Friend" <dan@donotspam.com> scripsit:
> > I have a bunch of mdi child forms and I use a collection for which forms are
[quoted text clipped - 17 lines]
>
> 'AnyForm' is the type of your MDI children.

Reply to this Message

Herfried K. Wagner [MVP] - 07 Sep 2004 22:57 GMT

* "Daniel Friend" <dan@donotspam.com> scripsit:

> What if there are about 50 types of MDI children and you don't know which
> one for need to change? I tried the following code to get the type, but I
> get an error:
> "aType is not defined"

Create an interface that all MDI child classes implement:

\\\
Public Interface ITheme
Sub GetTheme()
End Property
///

\\\
Public Class Form2
Inherits System.Windows.Forms.Form
Implements ITheme

Public Sub GetTheme() Implements ITheme.GetTheme
...
End Sub
.
.
.
End Class
///

> Public Sub ChangeFormat()
> Try
> Dim frmAny As Form
> For Each frmAny In Forms

\\\
DirectCast(frmAny, ITheme).GetTheme()
///

> Next
> End Try
> End Sub

Signature

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

Reply to this Message

Called A Function in Array Of MDI Child Forms

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