@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>无标题页</title> </head> <body> <form id="form1" runat="server"> <asp:CheckBoxList ID="CheckBoxList1" runat="server" Width="728px" Height="40px" RepeatDirection="Horizontal"> <asp:ListItem Value="报纸">报纸</asp:ListItem> <asp:ListItem>杂志</asp:ListItem> <asp:ListItem>广播</asp:ListItem> <asp:ListItem>电视</asp:ListItem> <asp:ListItem>网络</asp:ListItem> <asp:ListItem>亲朋介绍</asp:ListItem> <asp:ListItem>招生简章</asp:ListItem> <asp:ListItem>招生咨询会</asp:ListItem> </asp:CheckBoxList> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" Width="107px" /> </form> </body> </html> 2.default.aspx.cs protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { for (int i = 0; i < this.CheckBoxList1.Items.Count; i++) { if (this.CheckBoxList1.Items[i].Selected == true) { this.CheckBoxList1.Items[i].Text = this.CheckBoxList1.Items[i].Text.IndexOf("font") == -1 ? "<font color=‘red’>" + this.CheckBoxList1.Items[i].Text + "</font>" : this.CheckBoxList1.Items[i].Text.Replace("Black", "red"); } else { this.CheckBoxList1.Items[i].Text =this.CheckBoxList1.Items[i].Text.IndexOf("font") == -1 ? "<font color=‘Black’>" + this.CheckBoxList1.Items[i].Text + "</font>" : this.CheckBoxList1.Items[i].Text.Replace("red", "Black"); } } }