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How to: Create Radio Group and Respond to Value Selection

  • 2 minutes to read

This example demonstrates how to programmatically create a radio group, add two items to the collection, initialize their properties and assign a handler to the RadioGroup.SelectedIndexChanged event. The created radio group will be used to control the visibility of a standard button control. This example assumes that a button has already been placed on the form.

The image below shows the example application.


using DevExpress.Utils;
using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Repository;
using DevExpress.XtraEditors.Controls;

// ...
public Form1() {

private void CreateRadioEditors() {
    // Creates and initializes radio group items
    RadioGroupItem item1 = new RadioGroupItem();
    item1.Description = "Hide Button";
    RadioGroupItem item2 = new RadioGroupItem();
    item2.Description = "Show Button";
    // Creates and initializes the radio group
    RadioGroup radioEdit1 = new RadioGroup();
    radioEdit1.Name = "radioEdit1";
    radioEdit1.Location = new System.Drawing.Point(button1.Location.X, button1.Location.Y + 40);
    radioEdit1.Width = button1.Width;
    radioEdit1.Height = 100;
    // Sets the editor's selection based on the button's visibility
    if (button1.Visible) radioEdit1.SelectedIndex = 1;
    // Assigns a handler for the SelectedIndexChanged event
    radioEdit1.SelectedIndexChanged += new EventHandler(SelectedIndexChanged);

private void SelectedIndexChanged(object sender, System.EventArgs e) {
    RadioGroup edit = sender as RadioGroup;
    if (edit.SelectedIndex == 0) button1.Visible = false;
    else button1.Visible = true;