Problems with this code. Any ideas?

[NickJ]

I have a problem with the code. I think its got something to do with the way its laid out.

Im trying to get the user to enter a number from SetUpFrm which has a comboBox (ProjLstCb) so that the TabControl on Form1 will be populated with that number of TabPages

Here is the code

Dim ProjLstCb As ComboBox
Dim tabCount As Integer = Convert.ToInt16(ProjLstCb.SelectedItem)
Dim Count As Integer
Do Until Count = tabCount
Dim TabPage As New System.Windows.Forms.TabPage
TabPage.Text = "Projector1" & Count.ToString()
'additional code here to add other controls and modify
'properties of each individual tab page
TabSum1.TabPages.Add(TabPage)
Count = Count + 1
Loop

The problem isTabsum1 is on form1 and this code is on SetupFrm, so how do I tell this bit of code to look at form1 for the Tabsum1?

Thanks

Nick

 

[mjb3030]

You would need to have a reference to form1 in this code. When you instantiate the SetupFrm, pass a reference to form1 as an argument.

Private frm as form1
Public Sub New(f as form1)
mybase.new
InitializeComponent
frm = f
End Sub
 
 
frm.TabSum1.TabPages.Add(TabPage)

 

[NickJ]

thanks for that but this line of code returns an error...

frm.TabSum1.TabPages.Add(TabPage)

This is the error...

An unhandled exception of type 'System.NullReferenceException' occurred in Projection Maintenance.exe

Additional information: Object reference not set to an instance of an object.

What am i doing wrong

 

[mjb3030]

Make sure that wherever you declare the SetUpFrm, you pass the reference to form1 like this:

dim frmSetUp as SetUpFrm = New SetUpFrm(Me) 'Use Me if you are doing this from form1. Use whatever variable you have for form1 if you are doing it from somewhere else