PLEASE: Problem with TreeView, TreeNode Inherit

[Frank Uray]

Hi all

I have made my own Treeview Class with some additional
properties.
Now I am trying to clone Treenodes (Root), and it works
fine if I use System.Windows.Forms.TreeNode. If I use
my own class and debug it I see in the Locals Window
that the nodes have been cloned, but nothing happens
in the TreeView...
Following I have pasted the code of the class and how
I am testing it.

Thanks for any help!
Regards
Frank

-*********** The class
Public Class Cls_firstTreeView
Inherits System.Windows.Forms.TreeView
Implements ICloneable

Public Shadows Property SelectedNode() As
Cls_firstTreeNode
Get
Return CType(MyBase.SelectedNode,
Cls_firstTreeNode)
End Get
Set(ByVal Value As Cls_firstTreeNode)
MyBase.SelectedNode = Value
End Set
End Property

Public Function Clone() As Object Implements
ICloneable.Clone
Return Me.MemberwiseClone
End Function

End Class

Public Class Cls_firstTreeNode
Inherits System.Windows.Forms.TreeNode

Private var_Key As String
Private var_Key1 As String
Private var_Key2 As String
Private var_Key3 As String
Private var_Key4 As String
Private var_Key5 As String
Private var_PK As Integer

Public Overrides Function Clone() As Object
Return Me.MemberwiseClone
End Function

Public Sub New(Optional ByVal Text As String = "",
Optional ByVal Key As String = "", Optional ByVal Key1 As
String = "", Optional ByVal Key2 As String = "", Optional
ByVal Key3 As String = "", Optional ByVal Key4 As String
= "", Optional ByVal Key5 As String = "", Optional ByVal
PK As Integer = 0)
MyBase.New(Text)
var_Key = Key
var_Key1 = Key1
var_Key2 = Key2
var_Key3 = Key3
var_Key4 = Key4
var_Key5 = Key5
var_PK = PK
End Sub

Public Shadows Function Add(ByVal Text As String,
ByVal Key As String, Optional ByVal Key1 As String = "",
Optional ByVal Key2 As String = "", Optional ByVal Key3 As
String = "", Optional ByVal Key4 As String = "", Optional
ByVal Key5 As String = "", Optional ByVal PK As Integer =
0) As Cls_firstTreeNode
MyBase.Nodes.Add(Text)
var_Key = Key
var_Key1 = Key1
var_Key2 = Key2
var_Key3 = Key3
var_Key4 = Key4
var_Key5 = Key5
var_PK = PK
End Function

Public Shadows Function Add(ByVal TreeNode As
Cls_firstTreeNode) As Integer
MyBase.Nodes.Add(TreeNode)
var_Key = Key
var_Key1 = Key1
var_Key2 = Key2
var_Key3 = Key3
var_Key4 = Key4
var_Key5 = Key5
var_PK = PK
End Function

Public Property Key() As String
Get
Return var_Key
End Get
Set(ByVal Value As String)
var_Key = Value
End Set
End Property

Public Property Key1() As String
Get
Return var_Key1
End Get
Set(ByVal Value As String)
var_Key1 = Value
End Set
End Property

Public Property Key2() As String
Get
Return var_Key2
End Get
Set(ByVal Value As String)
var_Key2 = Value
End Set
End Property

Public Property Key3() As String
Get
Return var_Key3
End Get
Set(ByVal Value As String)
var_Key3 = Value
End Set
End Property

Public Property Key4() As String
Get
Return var_Key4
End Get
Set(ByVal Value As String)
var_Key4 = Value
End Set
End Property

Public Property Key5() As String
Get
Return var_Key5
End Get
Set(ByVal Value As String)
var_Key5 = Value
End Set
End Property

Public Property PK() As Integer
Get
Return var_PK
End Get
Set(ByVal Value As Integer)
var_PK = Value
End Set
End Property

End Class

-*********** How I am testing
Dim MyTreeView As New
firstTreeView.Cls_firstTreeView()
Dim MyRootNode1 As New
firstTreeView.Cls_firstTreeNode("Root X1")
MyRootNode1.Key = "Key Root X1"
Dim MyRootNode2 As New
firstTreeView.Cls_firstTreeNode("Root X2")
MyRootNode2.Key = "Key Root X2"
Dim MyChildNode1 As New
firstTreeView.Cls_firstTreeNode("Child X1")
MyChildNode1.Key = "Key Child X1"
Dim MyChildNode2 As New
firstTreeView.Cls_firstTreeNode("Child X2")
MyChildNode2.Key = "Key Child X2"

MyRootNode1.Nodes.Add(MyChildNode1)
MyRootNode2.Nodes.Add(MyChildNode2)
MyTreeView.Nodes.Add(MyRootNode1)
MyTreeView.Nodes.Add(MyRootNode2)

Dim RootNodes As New
firstTreeView.Cls_firstTreeNode()
Me.TreeView1.BeginUpdate()
For Each RootNodes In MyTreeView.Nodes
Me.TreeView1.Nodes.Add(CType(RootNodes.Clone,
firstTreeView.Cls_firstTreeNode))
Next
Me.TreeView1.EndUpdate()
Me.TreeView1.Refresh()

 

[Bharat Patel [MSFT]]

Hi Frank,

I am not sure about your code as I have not recreated it here. However, we have
a knowledge base article which provides the step on how to extend TreeNode
class:

311318 HOW TO: Create a Key Property for a TreeView Node in Visual Basic .NET
http://support.microsoft.com/?id=311318

Please review this and modify your code accordingly and see how it works.

Hope this helps!
Bharat Patel
Microsoft, Visual Basic .NET

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