Post Back Tree view when tree node check changed

Question

Hi everyone, 
I have a tree view, both child and parent have check box. I want to check all the child on the parent selection. 
I try "SelectedNodeChanged" but the page doesn't post back to fire my function.
I know I can use javascript to post back the page, but is there any other way to post back my page without javascript???  
Thnaks in advance. 

Answer 1

Hi everyone, 
I have a tree view, both child and parent have check box. I want to check all the child on the parent selection. 
I try "SelectedNodeChanged" but the page doesn't post back to fire my function.
I know I can use javascript to post back the page, but is there any other way to post back my page without javascript???  
Thnaks in advance. 
Assuming this is a WinForm application (it looks like it may not be), the following works pretty well:
Option Strict On
Option Explicit On
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
With TreeView1
.CheckBoxes = True
.ShowLines = True
.ShowPlusMinus = True
.ShowRootLines = True
.ExpandAll()
End With
End Sub
' Updates all child tree nodes recursively.
Private Sub CheckAllChildNodes(ByVal treeNode As TreeNode, ByVal nodeChecked As Boolean)
Dim node As TreeNode
For Each node In treeNode.Nodes
node.Checked = nodeChecked
If node.Nodes.Count > 0 Then
' If the current node has child nodes, call the CheckAllChildsNodes method recursively.
Me.CheckAllChildNodes(node, nodeChecked)
End If
Next node
End Sub
' NOTE This code can be added to the BeforeCheck event handler instead of the AfterCheck event.
' After a tree node's Checked property is changed, all its child nodes are updated to the same value.
Private Sub node_AfterCheck(ByVal sender As Object, ByVal e As TreeViewEventArgs) Handles TreeView1.AfterCheck
' The code only executes if the user caused the checked state to change.
If e.Action <> TreeViewAction.Unknown Then
If e.Node.Nodes.Count > 0 Then
' Calls the CheckAllChildNodes method, passing in the current
' Checked value of the TreeNode whose checked state changed.
Me.CheckAllChildNodes(e.Node, e.Node.Checked)
End If
End If
End Sub
End Class
The reference for that is this MSDN document.
If you're looking for a true tri-state operation though, honestly you might want to look at some third-party controls.
I hope that helps. :)
Please call me Frank :)