Loop Through Array of Labels Using Temp Variable - vb.net

Question

I've got a 2D array of 100 labels in a 10x10 matrix (it's 2D because it represents some hardware out in the real world, if anyone cares). I want to loop through and check a conditional, and change the label background color if the conditional is false.
I've tried this ten different ways, but I keep getting an exception thrown because the temp variable I have created won't take an assignment to one of the label names.
'Table for correct switch module for corresponding actuator
Dim ActLabelLookup(,) As Label =
{{MTA91, MTA92, MTA93, MTA94, MTA95, MTA96, MTA97, MTA98, MTA99, MTA100},
{MTA81, MTA82, MTA83, MTA84, MTA85, MTA86, MTA87, MTA88, MTA89, MTA90},
{MTA71, MTA72, MTA73, MTA74, MTA75, MTA76, MTA77, MTA78, MTA79, MTA80},
{MTA61, MTA62, MTA63, MTA64, MTA65, MTA66, MTA67, MTA68, MTA69, MTA70},
{MTA51, MTA52, MTA53, MTA54, MTA55, MTA56, MTA57, MTA58, MTA59, MTA60},
{MTA41, MTA42, MTA43, MTA44, MTA45, MTA46, MTA47, MTA48, MTA49, MTA50},
{MTA31, MTA32, MTA33, MTA34, MTA35, MTA36, MTA37, MTA38, MTA39, MTA40},
{MTA21, MTA22, MTA23, MTA24, MTA25, MTA26, MTA27, MTA28, MTA29, MTA30},
{MTA11, MTA12, MTA13, MTA14, MTA15, MTA16, MTA17, MTA18, MTA19, MTA20},
{MTA1, MTA2, MTA3, MTA4, MTA5, MTA6, MTA7, MTA8, MTA9, MTA10}}
Private Sub UpdateActuatorStatus()
Dim X As Integer
Dim Y As Integer
Dim CurrAct As New Label
For X = 0 To (ActControl.MAX_X - 1)
For Y = 0 To (ActControl.MAX_Y - 1)
If TempFunctionalActuatorMatrix(X, Y) = False Then
CurrAct = ActLabelLookup(X, Y)
CurrAct.BackColor = Color.Firebrick
End If
Next
Next
End Sub
With this code, CurrAct is never getting set to anything. Anyone see what I'm doing wrong?

Answer 1

Your array isn't initialised (well, it is, but it is initialised with nothings as the labels are nothing as the form instance is created).
Try filling it before parsing (in Form Load or in UpdateActuatorStatus):
ActLabelLookup =
{{MTA91, MTA92, MTA93, MTA94, MTA95, MTA96, MTA97, MTA98, MTA99, MTA100},
{MTA81, MTA82, MTA83, MTA84, MTA85, MTA86, MTA87, MTA88, MTA89, MTA90},
{MTA71, MTA72, MTA73, MTA74, MTA75, MTA76, MTA77, MTA78, MTA79, MTA80},
{MTA61, MTA62, MTA63, MTA64, MTA65, MTA66, MTA67, MTA68, MTA69, MTA70},
{MTA51, MTA52, MTA53, MTA54, MTA55, MTA56, MTA57, MTA58, MTA59, MTA60},
{MTA41, MTA42, MTA43, MTA44, MTA45, MTA46, MTA47, MTA48, MTA49, MTA50},
{MTA31, MTA32, MTA33, MTA34, MTA35, MTA36, MTA37, MTA38, MTA39, MTA40},
{MTA21, MTA22, MTA23, MTA24, MTA25, MTA26, MTA27, MTA28, MTA29, MTA30},
{MTA11, MTA12, MTA13, MTA14, MTA15, MTA16, MTA17, MTA18, MTA19, MTA20},
{MTA1, MTA2, MTA3, MTA4, MTA5, MTA6, MTA7, MTA8, MTA9, MTA10}}

Answer 2

Change the member-level declaration of ActLabelLookup to just:
Dim ActLabelLookup(,) As Label
In the form's Load event handler add a line to initialize it:
ActLabelLookup(,) =
{{MTA91, MTA92, MTA93, MTA94, MTA95, MTA96, MTA97, MTA98, MTA99, MTA100},
{MTA81, MTA82, MTA83, MTA84, MTA85, MTA86, MTA87, MTA88, MTA89, MTA90},
{MTA71, MTA72, MTA73, MTA74, MTA75, MTA76, MTA77, MTA78, MTA79, MTA80},
{MTA61, MTA62, MTA63, MTA64, MTA65, MTA66, MTA67, MTA68, MTA69, MTA70},
{MTA51, MTA52, MTA53, MTA54, MTA55, MTA56, MTA57, MTA58, MTA59, MTA60},
{MTA41, MTA42, MTA43, MTA44, MTA45, MTA46, MTA47, MTA48, MTA49, MTA50},
{MTA31, MTA32, MTA33, MTA34, MTA35, MTA36, MTA37, MTA38, MTA39, MTA40},
{MTA21, MTA22, MTA23, MTA24, MTA25, MTA26, MTA27, MTA28, MTA29, MTA30},
{MTA11, MTA12, MTA13, MTA14, MTA15, MTA16, MTA17, MTA18, MTA19, MTA20},
{MTA1, MTA2, MTA3, MTA4, MTA5, MTA6, MTA7, MTA8, MTA9, MTA10}}