性别 
    <asp:RadioButton ID="r1_1" runat="server" GroupName="g1" Text="男" />
    <asp:RadioButton ID="r1_2" runat="server" GroupName="g1" Text="女" />
    <br />
选择
    <asp:CheckBox ID="c1_1" runat="server" Text="选择1" />
    <br />
    <asp:CheckBox ID="c1_2" runat="server" Text="选择2"/>
    <br />

foreach (Control cl in this.form1.Controls)
            {
                if (cl is RadioButton)
                {
                    RadioButton tempR = ((RadioButton)cl);
if (tempR.Checked)
                    {
//此处省略
                    }
                }
                if (cl is CheckBox)
                {
                    CheckBox tempC = ((CheckBox)cl);
if (tempC.Checked)
                    {
                        //此处省略
                    }
                }
            }