Horizontal Scrolling on a DataGridView unexpectedly runs Main() 1

[PGO01]

I have a DataGridView in a Windows application that has it's datasource set to a List at runtime.

The problem is when I scroll to the right to see the columns that are off-screen, the static Main() gets fired in the Program.cs and I get a NullReferenceException on the:

Application.Run(new MainForm());

Anyone know why this is???

Many thanks,

 

[RyanEK]

Your grid control is raising the exception. It may be trying to access an object that is null, has not been instantiated or doesn't exist. Something like a calculated field which only gets fired when displayed on screen.

 

[PGO01]

You're right! Some of the values in the bound object are null... how can I handle this? Is there a property that I can set like a default value?

I would be happy to say if the value is null just display an empty string.