Check value of variable

[SIMIN]

Private ReportLog As StringBuilder

Private Sub DoThat()

   'We didn't assign any value to the ReportLog so here we want to check if it's empty or not?
   If ReportLog IsNot Nothing And ReportLog.Length > 0 Then
       '
   End IF

End Sub

The problem is that "If ReportLog IsNot Nothing And ReportLog.Length > 0 Then" itself throws an exception!

 

A first chance exception of type 'System.NullReferenceException' occurred in MyApp.exe

A first chance exception of type 'System.ComponentModel.Win32Exception' occurred in System.dll

 

How should I check that variable?

Thank you :)

[PlausiblyDamp]

For .Net 2 and higher

If ReportLog IsNot Nothing AndAlso ReportLog.Length > 0 Then

 

otherwise you would need to use a couple of If statements nested

If ReportLog IsNot Nothing Then
   If ReportLog.Length > 0 Then
       'do stuff here