Why am I getting System.NullReferenceException: Object reference not set to an instance of an object?

Question

I'm trying to assign an instance of a Form to a Form Property

The system keeps showing an error at my second line of code below

Dim objFrm = New LsProg.SFile.frmTestRel(AddressOf sOpDos, AddressOf sOpDosLine, AddressOf sOpFac) 
_FavoriteForm.FrmInstance = objFrm
_FavoriteForm.FrmName = objFrm.Name

I would assume that _FavoriteForm is not initialized before this code is ran. — Danieboy, Jul 28 '16 at 10:27
_FavoriteForm is a class with 2 properties (name of type string and instance of type Form) — Tassisto, Jul 28 '16 at 10:28

score 1 · Answer 1 · answered Jul 28 '16 at 10:30

1

You need to initialize _FavoriteForm before running this code.

answered Jul 28 '16 at 10:30

Danieboy

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score 1 · Accepted Answer · answered Jul 28 '16 at 10:31

If you get a NullReferenceException you need to think about what is actually Null and then go back and make sure you initialise it.

You told us

_FavoriteForm.FrmInstance = objFrm

threw this exception, so _FavoriteForm is clearly Null and needs to be initialised fist.

Why am I getting System.NullReferenceException: Object reference not set to an instance of an object?

2 Answers2