How to disable navigation on WinForm with arrows in C#?

Question

I need to disable changing focus with arrows on form. Is there an easy way how to do it?

Thank you

Answer 1

Something along the lines of:

    private void Form1_Load(object sender, EventArgs e)
    {
        foreach (Control control in this.Controls)
        {
            control.PreviewKeyDown += new PreviewKeyDownEventHandler(control_PreviewKeyDown);
        }
    }

    void control_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
    {
        if (e.KeyCode == Keys.Up || e.KeyCode == Keys.Down || e.KeyCode == Keys.Left || e.KeyCode == Keys.Right)
        {
            e.IsInputKey = true;
        }
    }

Answer 2

I tried this aproach, where the form handles the preview event once. It generates less code than the other options.

Just add this method to the PreviewKeyDown event of your form, and set the KeyPreview property to true.

private void form1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
    switch (e.KeyCode)
    {
        case Keys.Up:
        case Keys.Down:
        case Keys.Left:
        case Keys.Right:
            e.IsInputKey = true;
            break;
        default:
            break;
    }
}