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Thread: HELP! Trying to dynamically hide / show panel on form through onload event of form...getting: Object reference not set to an instance of an object.

Dennis Putnam
Posts: 2

HELP! Trying to dynamically hide / show panel on form through onload event of form...getting: Object reference not set to an instance of an object.
Posted: 22 May 09 9:17 AM

I am new to SLX, and am trying to dynamically hide / show a panel on a form in the onload event of my form.

I have added the panel to the form, and added a couple of fields in the panel, but when I try to reference the panel in the code snippet as follows:

form.pnlArchitect.Visible = False

I get the following runtime error:

Object reference not set to an instance of an object.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 49: form.dtPresentation.Caption = ""
Line 50:
Line 51: form.pnlArchitect.Visible = False
Line 52:
Line 53:

Can you guys offer any help? Any assistance would be greatly appreciated!
thank you,

Dennis Putnam

[Reply][Quote]

John H. Hedges
Posts: 62

Re: HELP! Trying to dynamically hide / show panel on form through onload event of form...getting: Object reference not set to an instance of an object.
Posted: 23 May 09 11:28 AM

This is a regular ActiveForm, not a .NET form... correct?

You shouldn't need the "form" qualifier at all, but is the name of the form actually "form", or is it something like "Form1" or "frmWhatever"...?

[Reply][Quote]

RJ Samp
Posts: 973

Re: HELP! Trying to dynamically hide / show panel on form through onload event of form...getting: Object reference not set to an instance of an object.
Posted: 02 Jun 09 3:19 PM

1. Add an event to the form itself. example OnChange
2. reference the control on the form and make it visible true or false.

Sub AXFormChange(Sender)
pnlOne.Visible = True
pklTest.Visible = True

END SUB

We use this all of the time.....works like a charm.

[Reply][Quote]

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