Test the object type of TTreeNode.Data

[Marion]

How do I determine the object type in a TTreeNode.Data?

I have tried and failed with:

Code: Pascal  [Select][+][-]

1. TypeOf(Node.Data^) = TypeOf(TProject)
2.  
3. Node.Data = TypeOf(TProject)

I can't find anything about this.

[jamie]

First you need to check it for assignment...

if Assigned(Node.Data) then
 
 if TObject(Node.Data) is TheNameOFTheClass Then....

[Marion]

First you need to check it for assignment...

if Assigned(Node.Data) then
 
 if TObject(Node.Data) is TheNameOFTheClass Then....

Thank you so much!

[Remy Lebeau]

First you need to check it for assignment...

if Assigned(Node.Data) then

You don't need that.  All that will do is tell you whether Data is nil or not.  Calling the 'is' operator on a nil pointer will return False (and likewise, calling the 'as' operator on a nil pointer will return a nil pointer).  So the Assigned() check is redundant.