//examples with source code to desingn an application with checkbox and adiobutton
public partial class Form6 : Form{
int count = 0;
public Form6()
{
InitializeComponent();
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
CheckBox cb = sender as CheckBox;
int amt = int.Parse(txtAmount.Text);
if (cb.Checked)
{
count += 1;
amt += Convert.ToInt32(cb.Tag);
}
else
{
count -= 1;
amt -= Convert.ToInt32(cb.Tag);
}
txtAmount.Text = amt.ToString();
if (count == 0)
radioButton1.Checked = true;
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
int amt = int.Parse(txtAmount.Text);
if (amt > 0)
{
RadioButton rb = sender as RadioButton;
if (rb.Checked)
amt += Convert.ToInt32(rb.Tag);
else
amt -= Convert.ToInt32(rb.Tag);
txtAmount.Text = amt.ToString();
}
else
radioButton1.Checked = true;
}
