Question

Since TabStop does not work on RadioButtons (see linked question), how can I prevent a (WinForm) RadioButton from being tabbed into, but also allow the user to click on the RadioButton, without the tab focus jumping somewhere else.

I’ve read this and so I thought the following would work:

        rbFMV.Enter += (s, e) => focusFirstWorkflowButton();
        rbFMV.MouseUp += (s, e) => rbFMV.Focus();

But it doesn’t. When I click on the RB, the focus jumps away, and does not come back on Mouse Up.

Any dirty workarounds out there?

Answer 1

Try something like this:

Set TabStop property of the radiobuttons to “false” in the form’s constructor. Then attach the following events handlers to the CheckedChanged events of the radiobuttons.

public partial class Form1 : Form
{        
    public Form1()
    {
        InitializeComponent();
        radioButton1.TabStop = false;
        radioButton2.TabStop = false;
    }

    private void radioButton1_CheckedChanged(object sender, EventArgs e)
    {
        radioButton1.TabStop = false;
        radioButton2.TabStop = false;
    }

    private void radioButton2_CheckedChanged(object sender, EventArgs e)
    {
        radioButton1.TabStop = false;
        radioButton2.TabStop = false;
    }

}

You can attach these event handlers using lambda aswell, as you have shown in your question.

But the important point here is that whenever a radiobutton is checked/unchecked, it’s tabstop property is also modified simultaneously. Hence you need to set it to false everytime that event occurs.