C# Tutorial 72: How to use TreeView (Add ,Removes Clear , Delete Checked Items from a TreeView)

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C# TreeView Tutorial
Populate a tree view in c#
Focus selected node in treeview by c#
Extending the treenode in the treeview (C#)
How to ADD child Nodes to Treeview in WPF, using C# code.
C# 2008 – Basic use of a TreeView control
c# – How to use TreeView
How to: Add and Remove Nodes with the Windows Forms TreeView
c# – How to Efficiently Delete Checked Items from a TreeView
c# – Removing nodes from a TreeView with multiple selection
c# – Delete selected parent node and child nodes
c# – How do I clear the selection of a selected node in a TreeView
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25 COMMENTS

  1. How do you make all child nodes checked if you check parent node or vice versa?
    Also,for example if you check Books(Parent) and Book3 but leave Book2 unchecked. After deleting, Book3 becomes orphan because its parent is gone.
    I want parent node to be there if not all child nodes are deleted eventhough you have parent checked. (parent unchecked and grey out when not all child nodes are checked))

  2. I get this when running the program: "NullReferenceException was unhandled" and "Object reference not set to an instance of an object." and the key point is if "node.Checked"?

  3. (my english is not so good)

    Hola. Muchas gracias. Estoy probando desde mi máquina la línea de código RemoveCheckedNodes(node.Nodes) y no puedo acceder a ¨.Nodes¨

    I write node.Nodes y doesn't exists .Nodes I write node.ChildNodes is the only option. What's wrong? I'm using ASP.NET VB.NET Visual Studio 2013 Please help me. Thank you.

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