Found the following interesting discussion in the Newsgroups:
| Passing Objects as type System.Object by:Stephen Travis | |
| I'm trying to ReDim a child object after passing the parent object as System.Object and it throws a System.InvalidCastException: Cast from type 'Object()' to type 'ChildType()' is not valid. If I pass the parent object as its type, the ReDim succeeds. How can I ReDim a child object from a parent object passed as System.Object? Here's the problem... Private Sub Page_Load Dim NewParent As New ParentType addTwoChildrenSucceeds(NewParent) addTwoChildrenFails(NewParent) End Sub Public Sub addTwoChildrenFails(ByVal parentobject As System.Object) ReDim parentobject.Child(1) ' Throws the exception. parentobject.Child(0) = New ChildType parentobject.Child(0).ChildName = "Brian" parentobject.Child(1) = New ChildType parentobject.Child(1).ChildName = "Gail" End Sub Public Sub addTwoChildrenSucceeds(ByVal parentobject As ParentType) ReDim parentobject.Child(1) parentobject.Child(0) = New ChildType parentobject.Child(0).ChildName = "Brian" parentobject.Child(1) = New ChildType parentobject.Child(1).ChildName = "Gail" End Sub Public Class ParentType Public ParentName As System.String Public Child() As ChildType End Class Public Class ChildType Public ChildName As System.String End Class | |
| Reply: by:The Grim Reaper | |
| You're nearly there... Public Sub addTwoChildrenFails(ByVal parentobject As System.Object) parentobject = DirectCast(parentobject, ParentType) ReDim parentobject.Child(1) ' Doesn't throw an exception any more parentobject.Child(0) = New ChildType parentobject.Child(0).ChildName = "Brian" parentobject.Child(1) = New ChildType parentobject.Child(1).ChildName = "Gail" End Sub Untested... I'm sure someone else will contradict me.... tis the way of it :D _____________________________ The Grim Reaper | |
| Reply: by:Tom Spink | |
| Hi, May I ask why you pass it as an object... will you have different classes being ReDim'med? -- HTH, -- Tom Spink Posted by Xander Zelders  |
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