How Can I have a tree with checkboxes? what's the property I need to set to enable this?
Thanks
well, im sure im just plain stupid. I guess those 10+ years of developer experience means nothing when facing infragistics logic.
45 minutes spend and im giving up.
How do I apply checkboxes to my node and my children and siblings in one click on the mother node?
what do you mean by apply? how to check the checkboxes?
If so, get the node and set the checkstate of your UltraTreeNode
no... i found the checkbox thingy. But when i click the node i want all its children to autofill the same state as the node
the only way I found to do this is by recursively check all the child programmatically.
There's this article in the KB that might help (but it check the parent, if all childs are checked) : http://devcenter.infragistics.com/Support/KnowledgeBaseArticle.aspx?ArticleID=6703
I did a class that encapsulate that exact behavior, check the parent, it check all the childs, uncheck the child will put the parent to indetermine state, check all child => check the parent.
So I suggest that you make a class that derive from UltraTree and that implement that exact behavior and uses that class in your app.
hope it helps
@genvej and GoDaddy
I don't know what GoDaddy's implementation looked like, but if someone is looking for code (as I was) I'd like to share the implementation I came up with, based on the Knowledge Base article. Feel free to use as you wish and to improve it. :-)
The checkbox/selection tree view behaves the way I expect it to:
If a node's CheckState changes, then all child nodes (recursively) are updated to the same state (Checked or Unchecked), and also the CheckState of the parent nodes (recursively) are recalculated (to Checked, Unchecked or Indeterminate).
(Of course just put this in a class as GoDaddy suggests.)
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Imports Infragistics.Win.UltraWinTreePublic Class Form1 Inherits System.Windows.Forms.Form ''' <summary> ''' The updatingLock is used because we only want to take ''' special actions (HandleTreeCheckedStateChanges(...)) ''' on Check changes caused by user actions (e.g. clicks) ''' and ignore programmatic CheckState changes. ''' </summary> Private updatingLock As Boolean = False#Region " Windows Form Designer generated code " Public Sub New() MyBase.New() 'This call is required by the Windows Form Designer. InitializeComponent() 'Add any initialization after the InitializeComponent() call End Sub 'Form overrides dispose to clean up the component list. Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub 'Required by the Windows Form Designer Private components As System.ComponentModel.IContainer 'NOTE: The following procedure is required by the Windows Form Designer 'It can be modified using the Windows Form Designer. 'Do not modify it using the code editor. Friend WithEvents baseTree As Infragistics.Win.UltraWinTree.UltraTree <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.baseTree = New Infragistics.Win.UltraWinTree.UltraTree() CType(Me.baseTree, System.ComponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() ' 'ultraTree1 ' Me.baseTree.Dock = System.Windows.Forms.DockStyle.Fill Me.baseTree.Location = New System.Drawing.Point(0, 0) Me.baseTree.Name = "baseTree" Me.baseTree.Size = New System.Drawing.Size(292, 266) Me.baseTree.TabIndex = 1 ' 'Form1 ' Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 266) Me.Controls.Add(Me.baseTree) Me.Name = "Form1" Me.Text = "Form1" CType(Me.baseTree, System.ComponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) End Sub#End Region Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load CreateExampleTree() ' Add checkboxes to tree Me.baseTree.Override.NodeStyle = NodeStyle.CheckBoxTriState End Sub Private Sub CreateExampleTree() Dim i, j, k As Integer For i = 1 To 5 Dim rootNode As UltraTreeNode = Me.baseTree.Nodes.Add("Node " + i.ToString()) For j = 1 To 5 Dim childNode As UltraTreeNode childNode = rootNode.Nodes.Add(rootNode.Key + " Child " + j.ToString()) For k = 1 To 5 Dim childchildNode As UltraTreeNode childchildNode = childNode.Nodes.Add(childNode.Key + " Child " + k.ToString()) Next k Next j Next i End Sub Private Sub baseTree_BeforeCheck(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinTree.BeforeCheckEventArgs) Handles baseTree.BeforeCheck Dim treeNode As UltraTreeNode = e.TreeNode ' Do not allow Indeterminate state for leaves. If IsLeafNode(treeNode) Then treeNode.Override.NodeStyle = NodeStyle.CheckBox End Sub Private Sub baseTree_AfterCheck(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinTree.NodeEventArgs) Handles baseTree.AfterCheck If updatingLock Then Return 'Because the Check change was caused programatically in HandleTreeCheckedStateChanges(...) Dim treeNode As UltraTreeNode = e.TreeNode updatingLock = True 'Begin handling checked state changes of the tree HandleTreeCheckedStateChanges(TreeNode) updatingLock = False 'End handling checked state changes of the tree End Sub ''' <summary> ''' When a tree node has been clicked and its CheckState has ''' changed we need to update the CheckState of the nodes ''' below and above in the tree. ''' </summary> Private Sub HandleTreeCheckedStateChanges(ByVal treeNode As UltraTreeNode) ' Each time a non-leaf node's CheckState changes ' 1) Make sure it is Checked or Unchecked - we should not be able to make it indeterminate by clicking! If treeNode.CheckedState = CheckState.Indeterminate Then treeNode.CheckedState = CheckState.Unchecked ' Since NodeStates: Unchecked => Checked => Indeterminate ' 2) Set all child nodes to same state. SetChildNodesCheckStatesToSameAs(treeNode) UpdateParentNodeCheckState(treeNode) End Sub Private Sub SetChildNodesCheckStatesToSameAs(ByVal treeNode As UltraTreeNode) If IsLeafNode(treeNode) Then Return 'End recursion For Each childNode As UltraTreeNode In treeNode.Nodes childNode.CheckedState = treeNode.CheckedState SetChildNodesCheckStatesToSameAs(childNode) Next End Sub ''' <summary> ''' Verifies the CheckState of the parent node for the ''' specified treeNode, by setting the parent node's ''' CheckState property based on whether none, some, ''' or all of its child nodes are currently checked. ''' </summary> ''' <param name="treeNode"></param> ''' <remarks>This method only has relevance for non root-level nodes</remarks> Private Sub UpdateParentNodeCheckState(ByVal treeNode As UltraTreeNode) Dim parentNode As UltraTreeNode = treeNode.Parent If parentNode Is Nothing Then Return 'End recursion ' Get the nodes collection to which the specified childNode belongs Dim nodesCollection As TreeNodesCollection = treeNode.ParentNodesCollection ' count of the number of checked nodes Dim checkedNodesCount As Integer = 0 Dim indeterminateCount As Integer = 0 For Each node As UltraTreeNode In nodesCollection If node.CheckedState = CheckState.Checked Then checkedNodesCount += 1 If node.CheckedState = CheckState.Indeterminate Then indeterminateCount += 1 Next ' Set appropriate CheckState of the parentNode If checkedNodesCount = nodesCollection.Count Then parentNode.CheckedState = CheckState.Checked ElseIf checkedNodesCount = 0 AndAlso indeterminateCount = 0 Then parentNode.CheckedState = CheckState.Unchecked Else parentNode.CheckedState = CheckState.Indeterminate End If ' Traverse up the tree... UpdateParentNodeCheckState(parentNode) End Sub Private Function IsLeafNode(ByVal treeNode As UltraTreeNode) As Boolean Return treeNode.Nodes.Count = 0 End FunctionEnd Class
I am not aware of any intrinsic support for this in the .NET TreeView control. If you like you can submit a feature request for the ability to control this in UltraTree via a property setting.
Its just strange as the standard tree control has this implemented already :-(