Error - Object reference not set to an instance ?

venkikrao · January 25th, 2006, 09:26 PM

Dear all,
Development in VB .NET 2003 / SqlSever express & MS-Access (option).

I am getting the following error while connecting forms in menu.

[u]"Object reference not set to an instance of an object"</u>

I'm using the following commands.
''' Sample code for your reference....
      Dim bm As TrialDB
      bm.Show()
      bm.ActiveForm.Enabled = True
      bm.ActiveForm.Focus()

I have a table in MS-Access - connecting thru OLEDB

Please guide me by giving some sample codes to connect my forms to menu.

thanks

venkatesh

VENKATESH

Imar · January 26th, 2006, 03:08 AM

The error message is correct. You are not creating a new instance of the TrialDB object, ALl you do is declare a variable, so the code will crash when you try to call a method on it. Change it to this:

Code:

Dim bm As New TrialDB
bm.Show()
bm.ActiveForm.Enabled = True
bm.ActiveForm.Focus()

This should work if TrialDB has a default constructor (that doesn't accept parameters).

HtH,

Imar

---------------------------------------
Imar Spaanjaars
Everyone is unique, except for me.

d_wzrdv_z · July 5th, 2007, 01:00 AM

object reference not set to an instance of an object - when I try to create a VSTO project I get this error. I have installed VSTO on 3 WinXP VS8 configs, each with a different problem (the others are required PIA's and Office 11 SP1 despite the machine running Office 12).... however, this is a regularly discussed error so I wondered if someone could point me in the direction of a clue....?

The Add-ins Detective (seriously, my life is nothing else right now!)