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How to check all nodes in a tree structure with minimal complexity

I need to check / select all nodes in a tree structure with minimal complexity. My tree view has 3 levels and many nodes in it. below is my code:

<asp:TreeView ID="TreeView1" runat="server" DataSourceID="XmlDataSource1" ShowCheckBoxes="All" ShowExpandCollapse="true"
            <DataBindings> 
                <asp:TreeNodeBinding DataMember="Category" TextField="Name" 
                    ValueField="Value" />
                <asp:TreeNodeBinding DataMember="LeafCategory" TextField="Name" 
                    ValueField="Value" />
                <asp:TreeNodeBinding DataMember="ChildCategory" TextField="Name" 
                    ValueField="Value" />
                <asp:TreeNodeBinding DataMember="SubCategory" TextField="Name" 
                    ValueField="Value" />
                <asp:TreeNodeBinding DataMember="Categories" TextField="Name" 
                    ValueField="Value" />
            </DataBindings>
        </asp:TreeView>
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1 answer


Something like that:



Private Sub SetMyChildren(ByVal parentNode As TreeNode, ByVal isChecked As Boolean, ByVal isSelected As Boolean)
    parentNode.Checked = isChecked
    parentNode.Selected = isSelected
    For Each child As TreeNode In parentNode.ChildNodes
        SetMyChildren(child, isChecked, isSelected)
    Next
End Sub


'f.e. set all nodes from complete TreeView to checked and selected:
For Each node As TreeNode In TreeView1.Nodes
    SetMyChildren(node, True, True)
Next
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