Question

I have written a custom ErrorProvider which adds some functionality to the existing ErrorProvider (sets control BackColor, ErrorCount etc). This was working find but now for some reason it falls over on the constructor:

_LoginErrorProvider = New ErrorLogErrorProvider(Me.components) 

The error is a NullReferenceException which is caused by the fact that Me.components is Nothing. Can anyone shed any light on why a form’s components collection would be Nothing? The form seems to work fine in every other way!

Answer 1

when you add a component to the design surface it adds this in the InitializeComponent function

me.components = new System.ComponentModel.Container() 

so just add this in your self.

or your

_LoginErrorProvider = New ErrorLogErrorProvider(Me.components) 

is being called before InitializeComponent