more confused than before.. such a simple probme

[nickrule99]

Ive tried searching, and Ive tried everything ive found, and I cant get anything to work

I need to do this-

A click event on form 2 will change a textbox's text on form1.

On form 2:

public frm1 as form1


Private Sub BtnGo_click (blah balh blah) handles btnGo.click

frm1.textbox1.text = "hello"

End Sub


From what Ive read, shouldnt this work?

[Andy]

that should work. post the exact code you're using please.

[nickrule99]

in form 2, i also tried:


public frm1 as form1

private sub btnGo_click (blah.....) handles btnGo.click

txtBoxonForm2.text = "hello"

frm1.textbox1.text = txtBoxOnForm2.text

end sub




help

[nickrule99]

Originally posted by Andy
that should work. post the exact code you're using please.

On form1:

Public frm5 As Form5
 
  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim form5 As New Form5
 
        form5.Show()
 
    End Sub

Form 5 loads, with a textbox, I want to change the text in the box using a button on form1.

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
 
                frm5.TextBox1.Text = "hello"
End Sub

I get this error message:

Object reference not set to an instance of an object.

[squirrelly1]

Why is it that you are using Frm5 instead of Form5 here:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
 
                frm5.TextBox1.Text = "hello"
End Sub

??? ???

Squirrelly1

[nickrule99]

Originally posted by squirrelly1
Why is it that you are using Frm5 instead of Form5 here:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
 
                frm5.TextBox1.Text = "hello"
End Sub

??? ???

Squirrelly1

I was using it because I set that as the name in public, so I thought I had to?

[squirrelly1]

Button 2 is on your Form1, right?


Declare the Form5 object as Friend or something like that at the top of your Form1.. initialize it then too...

Then... open it whenever you want to...

At the Button2 click event, make sure you use the same name for the Form5 object as you declared earlier...


If you're actually using frm5 in the button2 click event and Form5 when you set it to be an object, then you will get the error that you reported...

then just use the same command that you were using to set the textbox...

form5.textbox1.text = "whatever"

that should do it...

~Squirrelly1

btw... 9/10 times it's something simple that we just wouldn't expect to be there that keeps our software from running correctly... you'll scratch your head thinking about the huge algorithms and such and not even notice that you left a piece of code commented or you forgot a closing brace...

[nickrule99]

Friend form5
    Public frm5 As Form5

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim form5 As New Form5
 
 
        form5.Show()
 
 
    End Sub
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim form5 As Form5
 
        form5.TextBox1.Text()
 
    End Sub

Still doesnt work...
What am I doing wrong?

[techgnome]

Why do you keep dimming Form5?
It should be dimmed once, loaded once, and be done with it.

Public frm5 As Form5
 
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        frm5 = New Form5
 
 
        frm5 .Show()
 
 
    End Sub
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
 
        frm5 .TextBox1.Text()
 
    End Sub

TG

[salvelinus]

In your last example, you've got several instances of form5, although only one is instantiated.
You could declare and instantiate the form in a module. Alternatively, in your form:

'Form level declaration
Dim frm5 as New Form5
 
Private Sub Button1_Click(ByVal......)
   frm5.Show
   frm5.Textbox1.Text = "Hey! Look at me!"
End Sub

This assumes you actually have a form in your project named Form5.
If you're just referencing frm5 from this form, you don't need to declare it Public. If you declare it in a module, then declare it Public so you can reference it from other forms.

[nickrule99]

Do I need the frm5 = new form 5 in the button2 click event?

or can I do this:

Friend form5
    Dim frm5 As New form5
 
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
 
        frm5.Show()
 
 
    End Sub
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
 
        frm5.TextBox1.Text = "TTHH"
    End Sub

Cause that works too

Thanks guys.

-Nick

Originally posted by techgnome
Why do you keep dimming Form5?
It should be dimmed once, loaded once, and be done with it.

Public frm5 As Form5
 
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        frm5 = New Form5
 
 
        frm5 .Show()
 
 
    End Sub
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
 
        frm5 .TextBox1.Text()
 
    End Sub

TG

[salvelinus]

You don't need the Friend line.
If you dim frm5 as New Form5 again in button2, you'll get a second instance of Form5, a new, separate Form5. That's probably not what you want.
There's plenty of threads on this subject. You could do a search if we're not explaining it well for you.

[taxes]

Hi,

Have a look at the post by blue_rabbit in thread
http://www.vbforums.com/showthread.p...hreadid=288940

[squirrelly1]

Dude, it's pretty simple...

You only have to declare and initialize a Global (object OR variable) one time... and then use it from anywhere... Think about that, look at ur code, and you'll get it.

Squirrelly1