Working with Forms and Controls in VB.NET: RadioButton Control

The RadioButton control in VB.NET is used to present a list of mutually exclusive options to the user, where only one option can be selected at a time. The RadioButton control has a radio button next to each option that indicates whether that option is selected or not.

Syntax

The RadioButton control is created in the same way as other Windows Forms controls in VB.NET. The syntax to create a RadioButton control is:

Dim rb As New RadioButton

Example

Here is an example that demonstrates how to create a simple RadioButton control:

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Dim rb1 As New RadioButton
    rb1.Name = "rb1"
    rb1.Text = "Option 1"
    rb1.Checked = True
    rb1.Location = New Point(10, 10)
    Me.Controls.Add(rb1)

    Dim rb2 As New RadioButton
    rb2.Name = "rb2"
    rb2.Text = "Option 2"
    rb2.Checked = False
    rb2.Location = New Point(10, 30)
    Me.Controls.Add(rb2)
End Sub

Output

The output of the above example will show two radio buttons on the form, the first one labeled "Option 1" and selected by default, and the second one labeled "Option 2" and unselected.

Explanation

In the above example, we have created two RadioButton controls rb1 and rb2 and added them to the form Me.Controls.Add(rb). We have also set their Name, Text, Checked and Location properties. Here, the first radio button rb1 is selected by default as Checked property is set to True.

Use

The RadioButton control is commonly used when we want the user to select only one option from a list of options. It is often used in combination with other controls like a GroupBox or ListBox to present a list of mutually exclusive options to the user.

Important Points

• The RadioButton control is used to present a list of mutually exclusive options to the user.
• Only one option can be selected at a time.
• The Checked property of the RadioButton control is used to determine which option is selected.
• The RadioButton control is often used in combination with other controls like a GroupBox or ListBox.

Summary

In summary, the RadioButton control in VB.NET is used to present a list of mutually exclusive options to the user. It is highly useful when we want the user to select only one option from a list of options, and we can use it in combination with other controls like a GroupBox or ListBox to present the user with a list of options.