data interaction between 2 forms

[Martijn van Dru]

Hello all

I have the following problem. How can 2 forms interact wich eachother?

Public Class Form1
    Inherits System.Windows.Forms.Form

    Public myForm2 As New Form2()
    Public nData As Integer

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        myForm2.Show()
    End Sub

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

Public Class Form2
    Inherits System.Windows.Forms.Form

    Public nData As Integer
    Public myForm1 As New Form1()

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        myForm1.nData = TextBox2.Text
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()
    End Sub
End Class

In Form1 I create an instance of Form2. In Form2 I fill in an integer in textbox2 (nData). Now is my problem that I want that number nData in textbox1 on Form1, but I dont know how to do it. I dont wanna make a new instance of Form1, because then I have 2 different instances of Form1. Does somebody know in wich direction I have to search for my (simple?) problem?
thank you

 

[PlausiblyDamp]

http://www.computerhelp.forum/showthread.php?s=&threadid=75079&highlight=form1+form2

http://www.computerhelp.forum/showthread.php?s=&threadid=75526&highlight=form1+form2

 

[dynamic_sysop]

try this...

Public Class Form1
    Inherits System.Windows.Forms.Form

    Public myForm2 As New Form2()
    Public nData As Integer

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        ///
        Me.AddOwnedForm(myForm2) /// add this line in form1
        ///
        myForm2.Show()
    End Sub

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

Public Class Form2
    Inherits System.Windows.Forms.Form

    Public nData As Integer
    Public myForm1 As Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        ///
        myForm1 = Me.Owner /// add this in Form2.
        /////
        myForm1.nData = TextBox2.Text
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()
    End Sub
End Class

 

[dynamic_sysop]

you beat me to it PlausiblyDamp

 

[mutant]

You could also setup a class with shared members so you wouldnt have to use the Owner property and you would not have a problem accessing the form instances from anywhere in the program.

 

[Martijn van Dru]

Perfect that works, thanks for help