如何从下面的代码中获取选定的单选按钮值
protected void Page_Load(object sender, EventArgs e)
{
string query="select top 0.1 percent Title, Answer1, Answer2, Answer3, Answer4 from [Question] order by newid()" ;
SqlCommand cmd=new SqlCommand(query,con);
con.Open();
SqlDataReader dr=cmd.ExecuteReader();
if(dr.Read())
{
rbList1.Items.Add(dr[0].ToString());
rbList1.Items.Add(dr[1].ToString());
rbList1.Items.Add(dr[2].ToString());
rbList1.Items.Add(dr[3].ToString());
}
else
{
MessageBox.Show("Some Proble Occure !");
}
con.Close();
}