[Mohan Giri]

Hi,
I tried a simple program in vb.net. In that program I used a class. Ok. I feel difficult to explain. I will post my code here.

Class Definition:

Public Class emp
Public ename As String
Public salary As Integer
Public eno As Integer
End Class


Form Load event code:

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim x As emp
x.ename = "Rajesh"
x.eno = 1086
x.salary = 10000
MsgBox(CType(x, emp).eno)
End Sub
End Class

I got an error.

An unhandled exception of type 'System.NullReferenceException' occurred in empdetails.exe

Additional information: Object reference not set to an instance of an object.

Anybody can help me to resolve this error??

Thanks in advance

[Iron_Cross]

Dim x As emp

should be

Dim x As emp = New emp()

x is still null, you have to call the constructor to actual create the object before using it.

For future reference you could also do it like this:

Dim x As New emp()
`OR you could also do it like this:
Dim x As emp
x = New emp()

[Mohan Giri]

Thanks Iron_Cross.

Dim x As emp = New emp

This code worked fine. But

Dim x As New emp()

its not working. The system not accepting () after emp.

[Iron_Cross]

Hmm, well it's been a long time since I used VB.NET so sorry
I think it's because you have no arguments....but eitherway at least it's working now

[jinexile]

Yes its because you have no arguments in the constructor of emp... its assuming your trying to make an array but your syntax is wrong