RadioButtonList rbl = new RadioButtonList();
            rbl.ID = "rbs1";
            rbl.Items.Add(new ListItem("A"));
            rbl.Items.Add(new ListItem("B"));
            rbl.Items.Add(new ListItem("C"));
            rbl.Items.Add(new ListItem("D"));
            this.form1.Controls.Add(rbl);

------解决方案--------------------
rbl.SelectedIndexChanged += new EventHandler("方法名");

------解决方案--------------------
能否偷懒的在一开始把RadioButton隐藏,在需要的时候显示出来?