How to cancel RadioButton or CheckBox checked change

Question

Is there any way to cancel a RadioButton or CheckBox's change in state before it changes?

I was hoping for a simple event like CheckedChanging or BeforeCheckedChange.

I really want to avoid listening for mouse clicks and key presses. But if you know of a proven reliable way of using mouse clicks and key presses, please explain it.

I'm using .NET 2.0 with standard Winforms controls.

Answer 1

Set AutoCheck to false.

Override OnClick to manual check the checkbox

Answer 2

Code demo's AutoCheck, adds a confirmation prompt to Click event.

 public partial class Form1 : Form { public Form1() { InitializeComponent(); this.checkBox1.AutoCheck = false; this.checkBox1.Click += new System.EventHandler(this.checkBox1_Click); } private void checkBox1_Click(object sender, EventArgs e) { CheckBox checkBox = (CheckBox)sender; if (!checkBox.Checked) { DialogResult dialogResult = MessageBox.Show( "Are you sure?", "my caption", MessageBoxButtons.YesNo); if (dialogResult == DialogResult.Yes) { checkBox.Checked = true; } } else { checkBox.Checked = false; } } } 

Answer 3

I used this to cancel a radio button check.

 private void radioButton1_MouseClick(object sender, MouseEventArgs e)
    {
        RadioButton r = (RadioButton)sender;
        r.Checked = !(r.Checked);
    }