Hi Guys,
I have a problem opening a child window within a parent window when passing
a variable between two child windows.
I have the parent window setup with two menuitems. The first calls Form2 and
the second calls Form3
The code follows:-
Private Sub MenuItem1_Click (ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MenuItem1.Click
Dim NewMDIChild As New Form2
NewMDIChild.Mdi Parent = Me
NewMDIChild.Sho w()
End Sub
Private Sub MenuItem2_Click (ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MenuItem2.Click
Dim NewMDIChild As New Form3
NewMDIChild.Mdi Parent = Me
NewMDIChild.Sho w()
End Sub
On Form2 I have a button which calls Form3 with some text I wish to display
in Form3
Form2 Code follows:-
Private ShowForm3 As New Form3(Me)
Private Sub Form2_Load(ByVa l sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
Label1.Text = "Text to Send"
End Sub
Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
Dim NewMDIChild As New Form3
Dim ShowForm3 = New Form3(Me)
ShowForm3.MdiPa rent = Me.MdiParent
ShowForm3.Show( )
End Sub
The code on Form3 is as follows:-
Private CallingForm As Form2
Public Sub New(ByVal newCallingForm As Form2)
MyBase.New()
InitializeCompo nent()
CallingForm = newCallingForm
End Sub
Private Sub Form3_Load(ByVa l sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
TextBox1.Text = CallingForm.Lab el1.Text
End Sub
If I open Form2, click on the button to open Form3 and display the text, all
is OK.
If I only click on "Open Form3" from the mainmenu of Form1 I get an error:-
An unhandled exception of type 'System.OutOfMe moryException' occurred in
system.windows. forms.dll
Additional information: Error creating window handle.
If I edit out the "TextBox1.T ext = CallingForm.Lab el1.Text" statement on
Form2 all is again OK but I can not pass the variable.
Any ideas on how to open Form3 (obviously without the text!)?
Cheers
Peter. 2 1360
Peter,
Assuming from your code that Form3 is a child from Form1 do you need to open
it as a child from form1 and not from form2
For that are in the childs the properties MDIParent and in the parent the
MDIChildren http://msdn.microsoft.com/library/de...ldrentopic.asp
You need those to do what you want.
You have first to find the index of your form3 in form2
In form2 you work with.
me.mdiparent.md ichildren
I hope this helps,
Cor
Cor,
You are correct in saying that Form3 is a child of Form1. If I do not
reference form3 to form2 (via the TextBox1.Text = CallingForm.Lab el1.Text
statement) form3 opens from form1 without any problems.
Form2, a child in form1, opens form3 still with form3 as a child in form1. I
am a bit confused about why I need to find the index of form2 when opening
form3 directly from form1.
Thanks
Peter.
"Cor Ligthert" <no************ @planet.nl> wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. .. Peter,
Assuming from your code that Form3 is a child from Form1 do you need to open it as a child from form1 and not from form2
For that are in the childs the properties MDIParent and in the parent the MDIChildren
http://msdn.microsoft.com/library/de...ldrentopic.asp
You need those to do what you want.
You have first to find the index of your form3 in form2
In form2 you work with.
me.mdiparent.md ichildren
I hope this helps,
Cor This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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