Problem initializing global label array outside of procedure

[Guest]

The following code snipet won't run if I initialize my global label array
outside of a procedure - say Form_Load. If I initialize the array inside
Form_Load then it works. Is there a way to initialize the label array
outside of a procedure as I am doing? Or... (see below this snipet)
---------------------------------------------------------------------------------
Public Class Form1
Inherits System.Windows.Forms.Form

" Windows Form Designer generated code "

Dim arrlbl As Label() = {lbl0, lbl1, lbl2, lbl3}

Private Sub Form1_Load(...)
Dim i As Integer
For i = 0 To arrlbl.Length - 1 : arrlbl(i).Text = "test" : Next
....
---this not working
----------------------------------------------------------------

Or...

Dim arrlbl(3) As Label

Private Sub Form1_Load(...)
Dim i As Integer
arrlbl(0) = lbl0
arrlbl(1) = lbl1
arrlbl(2) = lbl2
arrlbl(3) = lbl3
For i = 0 To arrlbl.Length - 1 : arrlbl(i).Text = "test" : Next
-------------------------------------------------------------------------

this works but adds an additional 4 rows of code to my project. Is this the
only way to initialize my global array?

Thanks,
Rich

 

[Dragon]

Hello Rich,

In your first example you initialize arrlbl at class level. Actually it
happens during the MyBase.New() statement.
lbl* variables are initialized in InitializeComponent() method which
executes later.

Thus, at the time ~arrlbl As Label() = {lbl0, lbl1, lbl2, lbl3}~ executes,
lbl's are still uninitialized, so you get an array full of Nothing's.

this works but adds an additional 4 rows of code to my project. Is this the
only way to initialize my global array?

No! You can shorten arrlbl(*) = lbl* statements by ~arrlbl = New Label()
{lbl0, lbl1, lbl2, lbl3}~; this way, you don't need to specify bounds in Dim
statement.
You also might want to put this in New() after InitializeComponent() to
simulate initialization at class level.

HTH

Roman

 

[Armin Zingler]

The following code snipet won't run if I initialize my global label
array outside of a procedure - say Form_Load. If I initialize the
array inside Form_Load then it works. Is there a way to initialize
the label array outside of a procedure as I am doing? Or... (see
below this snipet)
---------------------------------------------------------------------------------
Public Class Form1
Inherits System.Windows.Forms.Form

" Windows Form Designer generated code "

Dim arrlbl As Label() = {lbl0, lbl1, lbl2, lbl3}

Private Sub Form1_Load(...)
Dim i As Integer
For i = 0 To arrlbl.Length - 1 : arrlbl(i).Text = "test" : Next
...
---this not working
----------------------------------------------------------------

Dim arrlbl As Label()

Private Sub Form1_Load(...)
arrlbl = new label() {lbl0, lbl1, lbl2, lbl3}
'...


Armin

 

[Guest]

Thanks very much for your reply - question:
You can shorten arrlbl(*) = lbl* statements by ~arrlbl = New Label()
{lbl0, lbl1, lbl2, lbl3}~; this way, you don't need to specify bounds in Dim
statement.
You also might want to put this in New() after InitializeComponent() to
simulate initialization at class level.
<<

-----------------------------------------------------------------------
Public Sub New()
MyBase.New()

'This call is required by the Windows Form Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call

~arrlbl = New Label(){lbl0, lbl1, lbl2, lbl3}~

End Sub
-------------------------------------------------------------------

Do I Dim arrlbl? Dim inside of New( )? Appologize for my lack of brain
cells on this. May I request if you could show me a snippet of code what you
are suggesting on how to declare and initialize my global label array?

I'm not clear on your suggestion here.

Thanks,
Rich

 

[Guest]

OK. Thanks very much. Now I get it. I know I have done this before. I
just couldn't find my old code.

Thanks again,
Rich

 

[Dragon]

~arrlbl = New Label(){lbl0, lbl1, lbl2, lbl3}~

Eek! "~" was kinda quotation mark. You hadn't to type them.

Do I Dim arrlbl? Dim inside of New( )? Appologize for my lack of brain
cells on this. May I request if you could show me a snippet of code what you
are suggesting on how to declare and initialize my global label array?

No, I meant you should declare arrlbl at class level:

~
Private arrlbl() As Label
~

but initialize in New():

~
arrlbl = New Label() {lbl0, lbl1, lbl2, lbl3}
~

I'm not clear on your suggestion here.

I hope it's clear now. 8=]