-->

Visual Basic .NET - ComboBox Control

The VB.NET ComboBox control is used to provide a drop-down list of options for the user to select from. 

Common Properties:

  • Items: Gets or sets the items in the ComboBox
  • SelectedIndex: Gets or sets the index of the currently selected item
  • Text: Gets or sets the text of the currently selected item

Common Methods:

  • AddItem: Adds an item to the ComboBox
  • RemoveItem: Removes an item from the ComboBox
  • Clear: Removes all items from the ComboBox

Common Events:

  • SelectedIndexChanged: Raised when the user selects a different item in the ComboBox
  • TextChanged: Raised when the user changes the text of the currently selected item
  • DropDown: Raised when the drop-down list is shown

Example:

Here is a simple example of using the ComboBox control in VB.NET:

Create a new Windows Forms Application in Visual Studio.

Drag a ComboBox control onto the form.

In the form's Load event, add the following code to populate the ComboBox:

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ComboBox1.Items.Add("Option 1")
    ComboBox1.Items.Add("Option 2")
    ComboBox1.Items.Add("Option 3")
End Sub

Add a button to the form and handle its Click event with the following code to display the selected item in a message box:

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    MessageBox.Show("You selected " & ComboBox1.SelectedItem.ToString())
End Sub

Run the application and select an item from the ComboBox, then click the button to see the selected item in a message box.

This is just a simple example, but the ComboBox control can be used in many ways to provide a user-friendly interface for selecting from a list of options.