Object Type Equals Comparison [vb.net]

[NeuralJack]

Lets say I want to find out the Type of an Object - I often use tags. In order to do this do I really have to instantiate another new object to compare the tag object to? for instance

 

'Lets say obj is a Tag object imported into the function
Private Function IsObjMyClass(obj as Object) as boolean
       Dim MC1 As New MyClass1  'Do I really need to create an object here?
  
       If Object.ReferenceEquals(obj.GetType(), MC1.GetType()) Then
          Return True
       Else
          Return False
       End If
End Function
 

[MrPaul]

TypeOf operator

 

Use the TypeOf operator:

 

'Lets say obj is a Tag object imported into the function
Private Function IsObjMyClass(obj as Object) as boolean
       If TypeOf obj Is MyClass1 Then
          Return True
       Else
          Return False
       End If
End Function

 

Or simpler:

 

'Lets say obj is a Tag object imported into the function
Private Function IsObjMyClass(obj as Object) as boolean
       Return (TypeOf obj Is MyClass1)
End Function

 

Good luck :cool:

[NeuralJack]

Thanks a lot, that's exactly what i'm looking for!

[snarfblam]

There is one difference between the two methods:

If Object.ReferenceEquals(obj.GetType(), MC1.GetType()) Then
   'obj is an instance of MyClass1
End If
If TypeOf obj Is MyClass1 Then
   'obj is instance of MyClass1 or a derived class
End If