J'ai étendu treeview, treenode et nodetype afin que je puisse avoir des nœuds personnalisés. Certains nœuds possèdent des boutons d'image leur permettant d'ajouter un nœud enfant ou de supprimer le nœud. Je ne peux pas gérer les événements de mes boutons.Puis-je ajouter des boutons avec des événements à un treeNode personnalisé?
Public Class ContentTreeView
Inherits TreeView
Public Event OnAddChild(ByVal sender As Object, ByVal e As EventArgs)
Public Event OnDelete(ByVal sender As Object, ByVal e As EventArgs)
Private _AddImageURL As String = String.Empty
Private _DeleteImageURL As String = String.Empty
Public Property AddImageURL() As String
Get
Return _AddImageURL
End Get
Set(ByVal value As String)
_AddImageURL = value
End Set
End Property
Public Property DeleteImageURL() As String
Get
Return _DeleteImageURL
End Get
Set(ByVal value As String)
_DeleteImageURL = value
End Set
End Property
Protected Overrides Function CreateNode() As TreeNode
Dim retval As ContentTreeNode = New ContentTreeNode(AddImageURL, DeleteImageURL)
AddHandler retval.OnAddChild, AddressOf ContentNode_AddChild
AddHandler retval.OnDelete, AddressOf ContentNode_Delete
Return retval
End Function
Protected Sub ContentNode_AddChild(ByVal sender As Object, ByVal e As EventArgs)
RaiseEvent OnAddChild(Nothing, Nothing)
End Sub
Protected Sub ContentNode_Delete(ByVal sender As Object, ByVal e As EventArgs)
RaiseEvent OnDelete(Nothing, Nothing)
End Sub
Public Class ContentTreeNode
Inherits TreeNode
Public Event OnAddChild(ByVal sender As Object, ByVal e As EventArgs)
Public Event OnDelete(ByVal sender As Object, ByVal e As EventArgs)
Private _AddImageURL As String = String.Empty
Private _DeleteImageURL As String = String.Empty
Private btnAddChild As ImageButton
Private btnDelete As ImageButton
Public Sub New(ByVal AddImageURL_ As String, ByVal DeleteImageURL_ As String)
_AddImageURL = AddImageURL_
_DeleteImageURL = DeleteImageURL_
End Sub
Public Property AddImageURL() As String
Get
Return _AddImageURL
End Get
Set(ByVal value As String)
_AddImageURL = value
End Set
End Property
Public Property DeleteImageURL() As String
Get
Return _DeleteImageURL
End Get
Set(ByVal value As String)
_DeleteImageURL = value
End Set
End Property
Protected Overrides Sub RenderPreText(ByVal writer As HtmlTextWriter)
End Sub
Protected Overrides Sub RenderPostText(ByVal writer As HtmlTextWriter)
CreateChildControls()
If GetTreeNodeType() <> ContentTreeNodeTypes.Root Then
btnAddChild.RenderControl(writer)
If GetTreeNodeType() <> ContentTreeNodeTypes.Category Then
btnDelete.RenderControl(writer)
End If
End If
End Sub
Private Function GetTreeNodeType() As TreeNodeTypes
Dim leaf As TreeNodeTypes = TreeNodeTypes.Leaf
If ((Me.Depth = 0) AndAlso (Me.ChildNodes.Count > 0)) Then
Return ContentTreeNodeTypes.Root
End If
If Me.Depth = 1 Then
Return ContentTreeNodeTypes.Category
End If
If ((Me.ChildNodes.Count <= 0) AndAlso Not Me.PopulateOnDemand) Then
Return leaf
End If
Return ContentTreeNodeTypes.Parent
End Function
Protected Sub CreateChildControls()
'Controls.Clear()
'***Creat Add Button***
btnAddChild = New ImageButton()
btnAddChild.ID = "btnAddChild"
btnAddChild.ImageUrl = AddImageURL
btnAddChild.ToolTip = "Add Child"
AddHandler btnAddChild.Click, AddressOf btnAddChild_Click
'***Create DeleteButton***
btnDelete = New ImageButton()
btnDelete.ID = "btnDelete"
btnDelete.ImageUrl = DeleteImageURL()
btnDelete.ToolTip = "Delete Page"
AddHandler btnDelete.Click, AddressOf btnDelete_Click
''***Add Controls***
'Me.Controls.Add(btnAddChild)
'Me.Controls.Add(btnDelete)
End Sub
Protected Sub btnAddChild_Click(ByVal sender As Object, ByVal e As EventArgs)
RaiseEvent OnAddChild(Nothing, Nothing)
End Sub
Protected Sub btnDelete_Click(ByVal sender As Object, ByVal e As EventArgs)
RaiseEvent OnDelete(Nothing, Nothing)
End Sub
Public Enum ContentTreeNodeTypes
All = 7
Leaf = 4
None = 0
Parent = 2
Root = 1
Category = 3
End Enum
End Class
End Class
1) Puis-je mettre en œuvre quelque chose comme IPostBackEventHandler? 2) Est-ce possible puisque treeNode n'est pas un control/webcontrol?
Toute aide est appréciée ... Merci !!!
Je pense que vous avez peut-être raison, mais puisque les codes sont ajoutés/créés quand databound je ne peux pas vraiment faire grand-chose à ce sujet. – Mike