How to Add a Node to a TreeView Control in VB.net at Run Time

A treeview control is similar to a listbox however it has items called nodes. A treeview control is what you would see in your windows explorer to search directories. Here is how you can add nodes at runtime.

Difficulty: Easy

Instructions

Things You'll Need:

• VB.net

1. Open VB.net

2. 
   New Project

   Create a new VB.net project by selecting "File" then selecting "New Project".

3. 
   Button

   Add a button to the form. This button will be used to add the node at runtime. The underlying code will be addressed in a later step in this how to article.

4. 
   Treeview

   Add the treeview control to your form. This is the control you will need to add nodes to.

5. 
   Click event

   Double click on the button control to bring up the button's click event.

6. 
   Code

   In the click event we will add nodes to our treeview control with this code:
   TreeView1.Nodes.Add("Item " & TreeView1.Nodes.Count)
   
   This code says to add a node and name it "Item" and then assign the name with the number of items in the control. This way each item has a different name.

7. Run the program by pressing the "F5" key on your keyboard.

8. 
   Final Results

   Click the button a few times to see the nodes added.

Resources

• Mike's How-To Blog
• Pie Junction