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How to: Add and Remove Nodes with the Windows Forms TreeView Control |
03/30/2017 |
.net-framework |
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article |
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de1b82db-4905-449a-9f59-af271a6b6673 |
16 |
dotnet-bot |
dotnetcontent |
wpickett |
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
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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
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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)