我目前做了很简单的一步，就是列出了四种控件。。属于脑残行为。那么我该怎么做添加代码才能实现题目中的功能呢?
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="4.aspx.cs" Inherits="动态地改变字体显示效果._4" %>
<!DOCTYPE html>
<asp:RadioButtonList ID="RadioButtonList1" runat="server">
</asp:RadioButtonList>
<asp:CheckBox ID="CheckBox1" runat="server" />
<asp:CheckBoxList ID="CheckBoxList1" runat="server"> </asp:CheckBoxList>
</div>
</form>
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给你写了一个
<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Default.aspx.cs" Inherits="Q702913._Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Welcome to ASP.NET!
</h2>
<p>
To learn more about ASP.NET visit <a href="http://www.asp.net" title="ASP.NET Website">www.asp.net</a>.
</p>
<p>
You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&clcid=0x409"
title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>.
</p>
<asp:RadioButtonList ID="RadioButtonList1" runat="server"
onselectedindexchanged="RadioButtonList1_SelectedIndexChanged"
AutoPostBack="True">
<asp:ListItem>red</asp:ListItem>
<asp:ListItem>blue</asp:ListItem>
<asp:ListItem>black</asp:ListItem>
</asp:RadioButtonList>
<script type="text/javascript">
var para = document.getElementsByTagName("p");
for (var i = 0; i < para.length; i++) {
para[i].setAttribute("style", "color:<% =bgcolor %>");
}
</script>
</asp:Content>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Q702913
{
public partial class _Default : System.Web.UI.Page
{
public string bgcolor = "red";
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack && RadioButtonList1.SelectedValue != "")
{
bgcolor = RadioButtonList1.SelectedValue;
}
}
protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
bgcolor = RadioButtonList1.SelectedValue;
}
}
}
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