Reference parent form elemets by child

15 Nov 2006 11:17 AM

Prashwee

Hi All

I got a small problem with VB 2005

I have let's say Form1 .Form1 has a Text Box1 and a Button1. When I click
the Button1 in a Form1, Form2 opens which has a button2 and a text box2 as
well.
When i click the button2 in the Form2 , Form2 should close and value in the
text box2 should be copied to Form1 Textbox1.
I know that I have to pass the Text box control to Form2 constructer when I
open the Form2

But what is the standard way of doing this?

Can you reference the Form1 current instance in some way?

/Best Regards
PRash

15 Nov 2006 12:37 PM

Kerry Moorman

PRash,

In VB2005, from Form2 you can reference the textbox on Form1 like this:

Form1.Textbox1.Text = "Hello"

In VB2005 you do not need to pass a reference to Form1 in Form2's constructor.

Kerry Moorman

Show quoteHide quote

"Prashwee" wrote:

> Hi All
>
> I got a small problem with VB 2005
>
> I have let's say Form1 .Form1 has a Text Box1 and a Button1. When I click
> the Button1 in a Form1, Form2 opens which has a button2 and a text box2 as
> well.
> When i click the button2 in the Form2 , Form2 should close and value in the
> text box2 should be copied to Form1 Textbox1.
> I know that I have to pass the Text box control to Form2 constructer when I
> open the Form2
>
> But what is the standard way of doing this?
>
> Can you reference the Form1 current instance in some way?
>
> /Best Regards
> PRash
>
>
>

15 Nov 2006 1:14 PM

Phill W.

Prashwee wrote:

> When i click the button2 in the Form2 , Form2 should close and value in the
> text box2 should be copied to Form1 Textbox1.
> I know that I have to pass the Text box control to Form2 constructer when I
> open the Form2
>
> But what is the standard way of doing this?

Forms are classes so, if you want to manipulate one (like handing it a
value), you have to have a reference to it.

When you open Form2, pass it a reference to Form1.

Class Form2
    Public Sub New( ByVal oCaller as Form1 )
       Me.New() ' run all the stuff created by the Designer
       m_oCaller = oCaller
    End Sub

    Protected Overrides Sub OnClosed()
       m_oCaller.TextBox1.Text = Me.TextBox2.Text
    End Sub

    Private m_oCaller As Form1

End Class

HTH,
    Phill W.

15 Nov 2006 2:21 PM

Chris Dunaway

Phill W. wrote:
Show quoteHide quote

> Prashwee wrote:
>
> > When i click the button2 in the Form2 , Form2 should close and value in the
> > text box2 should be copied to Form1 Textbox1.
> > I know that I have to pass the Text box control to Form2 constructer when I
> > open the Form2
> >
> > But what is the standard way of doing this?
>
> Forms are classes so, if you want to manipulate one (like handing it a
> value), you have to have a reference to it.
>
> When you open Form2, pass it a reference to Form1.
>
> Class Form2
>     Public Sub New( ByVal oCaller as Form1 )
>        Me.New() ' run all the stuff created by the Designer
>        m_oCaller = oCaller
>     End Sub
>
>     Protected Overrides Sub OnClosed()
>        m_oCaller.TextBox1.Text = Me.TextBox2.Text
>     End Sub
>
>     Private m_oCaller As Form1
>
> End Class

Another option is to add a property to your form2 and access that in
Form1:

Class Form2

Public Property SomeString As String
End Property

End Class

Then in Form1, you can access that property after closing form2
(assuming you opened it with ShowDialog).

16 Nov 2006 5:20 AM

RobinS

Or add a public method to Form1. Call it from Form2
and pass textbox2.text to the method.
The method in form1 would take a string and stuff it into the
appropriate textbox.

Robin S.
-----------------------------
Show quoteHide quote

"Chris Dunaway" <dunaw***@gmail.com> wrote in message
news:1163600490.316438.189100@f16g2000cwb.googlegroups.com...
> Phill W. wrote:
>> Prashwee wrote:
>>
>> > When i click the button2 in the Form2 , Form2 should close and value in
>> > the
>> > text box2 should be copied to Form1 Textbox1.
>> > I know that I have to pass the Text box control to Form2 constructer
>> > when I
>> > open the Form2
>> >
>> > But what is the standard way of doing this?
>>
>> Forms are classes so, if you want to manipulate one (like handing it a
>> value), you have to have a reference to it.
>>
>> When you open Form2, pass it a reference to Form1.
>>
>> Class Form2
>>     Public Sub New( ByVal oCaller as Form1 )
>>        Me.New() ' run all the stuff created by the Designer
>>        m_oCaller = oCaller
>>     End Sub
>>
>>     Protected Overrides Sub OnClosed()
>>        m_oCaller.TextBox1.Text = Me.TextBox2.Text
>>     End Sub
>>
>>     Private m_oCaller As Form1
>>
>> End Class
>
> Another option is to add a property to your form2 and access that in
> Form1:
>
> Class Form2
>
>    Public Property SomeString As String
>    End Property
>
> End Class
>
> Then in Form1, you can access that property after closing form2
> (assuming you opened it with ShowDialog).
>