单选按钮的用法

<asp:RadioButton ID="btn1" runat="server" Text="男" GroupName="aa" Checked="true" /> <asp:RadioButton ID="btn2" runat="server" Text="女" GroupName="aa"/> <input id="rbtn1" name="sex" runat="server" checked="true" type="radio" value="男2" /> 男2 <input id="rbtn2" runat="server" name="sex" type="radio" value="女2" /> 女2 //==========后台 protected void Button1_Click1(object sender, EventArgs e) { if (this.rbtn1.Checked) { Response.Write(this.rbtn1.Value); } else if (this.rbtn2.Checked) { Response.Write(this.rbtn2.Value); } }