TreeView Control in VB.net – Properties, Methods and Events

What is TreeView Control in VB.net?

The TreeView Control in VB.net is used to show the same data in a tree structure that shows how the data is related to each other.

In the TreeView in VB.net, the root node is at the top, and it may have one or more child nodes.

Also, you can shrink or grow the root node by clicking on the plus sign (+) button.

It is also helpful to give the full path from the root node to the child node.

Let’s create a TreeView in VB.net by dragging a TreeView Control from the Toolbox and dropping it on the form.

TreeView Control in VB.net Properties

The following given below are some commonly used Properties of the TreeView Control in VB.net.

TreeView Control in VB.net Methods

The following given below are some commonly used Methods of the TreeView Control in VB.net.

TreeView Control in VB.net Events

The following given below are some commonly used Events of the TreeView Control in VB.net.

Let’s create a program to insert a node in the TreeView Control of the VB.NET Form.

Public Class Form1
    Private Sub Button1_Click_4(sender As Object, e As EventArgs) Handles Button1.Click
        Dim nd As String
        nd = InputBox("Enter Node name")  ' takes input from the user  
        If TreeView1.SelectedNode Is Nothing Then  ' insert a new node.  
            TreeView1.Nodes.Add(nd, nd)
        Else
            TreeView1.SelectedNode.Nodes.Add(nd, nd)   ' insert into the sub node or child node  
        End If
    End Sub
End Class

Program Output:

Click on the Add New button to insert a new node into the tree view control. It displays the following image on the monitor.

Click on the OK button to insert the ‘Programming Languages‘ node in the tree view control.

In the same way, we can add new nodes to the TreeView Control in VB.net, as shown below.

Summary

In this article, we talked about how to make and add multiple Node in a Windows Forms TreeView Control in VB.net using Microsoft Visual Studio both at design-time and at run-time.

Then we learned how to use the different Properties, Methods, and Events.

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