docs-desktop/dotnet-desktop-guide/framework/winforms/controls/how-to-add-and-remove-nodes-with-the-windows-forms-treeview-control.md

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title	ms.date	dev_langs	helpviewer_keywords	ms.assetid
Add and Remove Nodes with TreeView Control	03/30/2017	csharp vb cpp	examples [Windows Forms], TreeView control TreeView control [Windows Forms], removing nodes tree nodes in TreeView control TreeView control [Windows Forms], adding nodes	de1b82db-4905-449a-9f59-af271a6b6673

How to: Add and Remove Nodes with the Windows Forms TreeView Control

The Windows Forms xref:System.Windows.Forms.TreeView control stores the top-level nodes in its xref:System.Windows.Forms.TreeView.Nodes%2A collection. Each xref:System.Windows.Forms.TreeNode also has its own xref:System.Windows.Forms.TreeNode.Nodes%2A collection to store its child nodes. Both collection properties are of type xref:System.Windows.Forms.TreeNodeCollection, which provides standard collection members that enable you to add, remove, and rearrange the nodes at a single level of the node hierarchy.

To add nodes programmatically

1. Use the xref:System.Windows.Forms.TreeNodeCollection.Add%2A method of the tree view's xref:System.Windows.Forms.TreeView.Nodes%2A property.

   ' Adds new node as a child node of the currently selected node.  
   Dim newNode As TreeNode = New TreeNode("Text for new node")  
   TreeView1.SelectedNode.Nodes.Add(newNode)  
   

   // Adds new node as a child node of the currently selected node.  
   TreeNode newNode = new TreeNode("Text for new node");  
   treeView1.SelectedNode.Nodes.Add(newNode);  
   

   // Adds new node as a child node of the currently selected node.  
   TreeNode ^ newNode = new TreeNode("Text for new node");  
   treeView1->SelectedNode->Nodes->Add(newNode);  
   

To remove nodes programmatically

1. Use the xref:System.Windows.Forms.TreeNodeCollection.Remove%2A method of the tree view's xref:System.Windows.Forms.TreeView.Nodes%2A property to remove a single node, or the xref:System.Windows.Forms.TreeNodeCollection.Clear%2A method to clear all nodes.

   ' Removes currently selected node, or root if nothing is selected.  
   TreeView1.Nodes.Remove(TreeView1.SelectedNode)  
   ' Clears all nodes.  
   TreeView1.Nodes.Clear()  
   

   // Removes currently selected node, or root if nothing
   // is selected.  
   treeView1.Nodes.Remove(treeView1.SelectedNode);  
   // Clears all nodes.  
   TreeView1.Nodes.Clear();  
   

   // Removes currently selected node, or root if nothing  
   // is selected.  
   treeView1->Nodes->Remove(treeView1->SelectedNode);  
   // Clears all nodes.  
   treeView1->Nodes->Clear();  
   

See also

• TreeView Control
• TreeView Control Overview
• How to: Set Icons for the Windows Forms TreeView Control
• How to: Iterate Through All Nodes of a Windows Forms TreeView Control
• How to: Determine Which TreeView Node Was Clicked
• How to: Add Custom Information to a TreeView or ListView Control (Windows Forms)