Label Control Array not working

Posted on 2003-12-10
Medium Priority
Last Modified: 2011-10-03

Have converted from vb6 to vb.net

Have a control array for Label that works fine in a converted form.

When I try to copy all controls and code onto another form, the code breaks at the first instance of Me.Label(30).
When I change the code to Me._Label_30 it works fine.

The previous form (That I copied from) works fine with Me.Label(30).

Any ideas where I'm going wrong??

Question by:StuartK
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LVL 48

Expert Comment

ID: 9912098
.NET does not Support Control Arrays anymore

Author Comment

ID: 9912634

This is what the upgrade converter converted it to from vb6

Public WithEvents Label As Microsoft.VisualBasic.Compatibility.VB6.LabelArray

Public WithEvents _Label_26 As System.Windows.Forms.Label
Public WithEvents _Label_27 As System.Windows.Forms.Label
Public WithEvents _Label_29 As System.Windows.Forms.Label
Public WithEvents _Label_28 As System.Windows.Forms.Label

So control arrays are simulated in vb.net

This works on the converted from vb6 form. It's when I copy and paste all controls from that form to a new form that the errors happen

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LVL 48

Expert Comment

ID: 9912677
VB6 is not VB.NET what works in VB6 doen not mean it will work in VB.NET

label1(13) will work in VB6 not in .NET


label1_13 is for .NET in place of the Array


Accepted Solution

Tygur earned 200 total points
ID: 9913062
Apparently, there's something you failed to copy.  There should be something like this:
Me.Label = New Microsoft.VisualBasic.Compatibility.VB6.LabelArray(components)
CType(Me.Label, System.ComponentModel.ISupportInitialize).BeginInit()

Then after BeginInit() is called, there should be something to add those labels to the LabelArray:
Me.Label.SetIndex(_Label_26, CType(26, Short))
Me.Label.SetIndex(_Label_27, CType(27, Short))

Once all the labels are added, EndInit() should be called:
CType(Me.Label1, System.ComponentModel.ISupportInitialize).EndInit()

Of course, _Label_26, _Label_27, and the rest of them should be initialized before being added to the LabelArray.  By the way, this should all be done when the form is loading, but I think you knew that much.

Author Comment

ID: 9913088

But it is working on the form (IN VB.NET) that was originally converted over from vb6.

i.e. Me.Label(20).Visible works fine in VB.NET on converted form from vb6(lets say Frm_Original)

      Me.Label(20).Visible DOESN'T WORK on a newly added form(Frm_New) , after all controls from Frm_Original are copied over.

Me._Label_20.Visible WORKS on Frm_New

Label is declared as
Public WithEvents Label As Microsoft.VisualBasic.Compatibility.VB6.LabelArray


Expert Comment

ID: 9913207
You need to copy the other lines that I mentioned, too, not just the declaration.  Did you do that?

Author Comment

ID: 9913780

Thank you. It was the code in the style of

Me.Label.SetIndex(_Label_26, CType(26, Short))
Me.Label.SetIndex(_Label_27, CType(27, Short))

that was missing.

Thank you very very much.

And also to Mikel613 for his comments.

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