how to get checked node from treeview

[SachinC]

Hello,

I am using radtreeview. and added rootnode and child nodes to it,showing checkbox for each node (parent and child node).
after that i am selecting many nodes (Checkbox). after clicking remove button. i need to remove the checked nodes from treeview as well as from database.

So, how to get the collection of checked nodes?

Please help?

thanks
Sachin C

[Richard Slade]

Hi Sachin,

This will get you a collection of nodes that are checked. I've adapted the code at this Code Library Article

Private m_CheckedNodes As New System.Collections.Generic.List(Of Telerik.WinControls.UI.RadTreeNode)



Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    m_CheckedNodes.Clear()

    For Each node As Telerik.WinControls.UI.RadTreeNode In RecursiveTreeTraversal(Me.RadTreeView1.Nodes)

        MessageBox.Show(node.Text)

    Next

End Sub

Private Function RecursiveTreeTraversal(ByVal levelNodes As Telerik.WinControls.UI.RadTreeNodeCollection) As System.Collections.Generic.List(Of Telerik.WinControls.UI.RadTreeNode)

    For Each node As Telerik.WinControls.UI.RadTreeNode In levelNodes

        If node.Checked Then

            m_CheckedNodes.Add(node)

        End If

        RecursiveTreeTraversal(node.Nodes)

    Next

    Return m_CheckedNodes

End Function

and in C#

private System.Collections.Generic.List<Telerik.WinControls.UI.RadTreeNode> m_CheckedNodes = new System.Collections.Generic.List<Telerik.WinControls.UI.RadTreeNode>();
private void Form1_Load(System.Object sender, System.EventArgs e)
{
    m_CheckedNodes.Clear();
    foreach (Telerik.WinControls.UI.RadTreeNode node in RecursiveTreeTraversal(this.RadTreeView1.Nodes)) {
        MessageBox.Show(node.Text);
    }
}

private System.Collections.Generic.List<Telerik.WinControls.UI.RadTreeNode> RecursiveTreeTraversal(Telerik.WinControls.UI.RadTreeNodeCollection levelNodes)
{
    foreach (Telerik.WinControls.UI.RadTreeNode node in levelNodes) {
        if (node.Checked) {
            m_CheckedNodes.Add(node);
        }
        RecursiveTreeTraversal(node.Nodes);
    }

    return m_CheckedNodes;
}

hope that helps
Richard