The TreeView control is used to display hierarchical representations of items.

1. Presented by
Aneesha Jenson
III Bvoc Software Development

2. TreeView
The TreeView control is used to display hierarchical
representations of items.
Each node may contain one or more
child nodes.

3. How ???...

4. Select TreeView from Tool Box

5. Write the code…

6. Then the result is ….

8. Then the result is…

9. using System;
using System.Drawing;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
TreeNode tNode ;
tNode = treeView1.Nodes.Add("Websites");
treeView1.Nodes[0].Nodes.Add("Net-informations.com");
treeView1.Nodes[0].Nodes[0].Nodes.Add("CLR");
treeView1.Nodes[0].Nodes.Add("Vb.net-informations.com");
treeView1.Nodes[0].Nodes[1].Nodes.Add("String Tutorial");

10. treeView1.Nodes[0].Nodes[1].Nodes.Add("Excel Tutorial");
treeView1.Nodes[0].Nodes.Add("Csharp.net-informations.com");
treeView1.Nodes[0].Nodes[2].Nodes.Add("ADO.NET");
treeView1.Nodes[0].Nodes[2].Nodes[0].Nodes.Add("Dataset");
}
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show(treeView1.SelectedNode.FullPath.ToString ());
}
}
}

11. Result is ….

12. Properties of the TreeView Control
 BackColor : sets the background color
 BackgroundImage : set the background image
 Font : sets the font of the text displayed by the control.
 Nodes : collection of tree nodes that are assigned to the
tree view control.
 SelectedNode : sets the tree node that is currently
selected in the tree view control.
 FontHeight: Gets or sets the height of the font of the
control.
 Text: Gets or sets the text of the TreeView.
 VisibleCount:Gets the number of tree nodes that can be
fully visible in the tree view control.

13. Methods of TreeView
 ToString : Returns a string containing the name of the
control.
 Sort : Sorts all the items in the tree view control.
 GetNodeCount : Gets the number of tree nodes.
 ExpandAll : Expands all the nodes.
 CollapseAll :Collapses all the nodes including all
child nodes in the tree view control.
 GetNodeAt : Gets the node at the specified location.
 GetNodeCount: Gets the number of tree nodes.
 Remove : to remove the nodes.

14. TreeNode Class
 The TreeNode class represents a node of a TreeView.
 Each node in a TreeView control is an object of the
TreeNode class.