以编程方式触发事件C＃

Question

I have several radio buttons inside a container. For each one I have the CheckedChanged event so I have a code like this

private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
    if ((sender as RadioButton).Checked)
    // do stuff...
}
private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
    if ((sender as RadioButton).Checked)
    // do stuff...
}
private void radioButton3_CheckedChanged(object sender, EventArgs e)
{
    if ((sender as RadioButton).Checked)
    // do stuff...
}
// ... and so on...

Then I must fire the CheckedChanged event for the currently checked radioButton . To get the radioButton I used this code:

RadioButton checkedButton = container.Controls.OfType<RadioButton>()
                            .FirstOrDefault(r => r.Checked);

Now how can I fire the CheckedChanged event for checkedButton ?

EDIT: I'm using WinForms. My radio buttons are in a tabPage . When I open the tabPage I need to know what is the currently checked radioButton and fire the corresponding checkedChanged event. This is because when I select another tabPage I perform other actions and, going back to the tabPage containing the radio buttons, I need to restore the previous state.

Answer 1

Changing the value of the Checked property should fire the event:

checkedButton .Checked = !checkedButton .Checked;

You may also call the event handler explicitly, eg:

RadioButton checkedButton = container.Controls.OfType<RadioButton>().FirstOrDefault(r => r.Checked);
switch (checkedButton.Name)
{
    case "radioButton1":
        radioButton1_CheckedChanged(this, EventArgs.Empty);
        break;
    case "radioButton2":
        radioButton2_CheckedChanged(this, EventArgs.Empty);
        break;
    case "radioButton3":
        radioButton3_CheckedChanged(this, EventArgs.Empty);
        break;
}

Depending on your requirements, you may of course want to consider using the same event handler for all RadioButtons .