C# - If A Radiobutton Selected In GroupBox, Unselect Other Radiobuttons In Other GroupBoxes

Question

I have 11 GroupBoxes and 40 RadioButton in my project. I wanna make when I select a RadioButton in a GroupBox, the other RadioButtons in other GroupBoxes unselect.

Answer 1

You can recursively search the Form for all RadioButtons, then wire them up and use code like suggested in the linked question from the comments.

It might look something like:

public partial class Form1 : Form
{

    public Form1()
    {
        InitializeComponent();
        FindRadioButtons(this);
    }

    private List<RadioButton> RadioButtons = new List<RadioButton>();

    private void FindRadioButtons(Control curControl)
    {
        foreach(Control subControl in curControl.Controls)
        {
            if (subControl is RadioButton)
            {
                RadioButton rb = (RadioButton)subControl;
                rb.CheckedChanged += Rb_CheckedChanged;
                RadioButtons.Add(rb);
            }
            else if(subControl.HasChildren)
            {
                FindRadioButtons(subControl);
            }
        }
    }

    private void Rb_CheckedChanged(object sender, EventArgs e)
    {
        RadioButton source = (RadioButton)sender;
        if (source.Checked)
        {
            RadioButtons.Where(rb => rb != source).ToList().ForEach(rb => rb.Checked = false);
        }          
    }

}