1、建立网页CalendarThree.aspx，代码如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CalendarThree.aspx.cs" Inherits="CalendarThree" %>

2、CalendarThree.aspx.cs代码如下：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class CalendarThree : System.Web.UI.Page
{
String[][] holidays = new String[13][];
protected void Page_Load(object sender, EventArgs e)
{
for (int n = 0; n < 13; n++)
holidays[n] = new String[32];

holidays[1][1] = "元旦";
holidays[2][14] = "情人节";
holidays[3][8] = "妇女节";
holidays[3][12] = "植树节";
holidays[4][1] = "愚人节";
holidays[5][1] = "劳动节";
holidays[5][4] = "青年节";
holidays[5][12] = "护士节";
holidays[5][14] = "母亲节";
holidays[5][14] = "助残日";
holidays[6][1] = "国际儿童节";
holidays[6][5] = "环境保护日";
holidays[6][18] = "父亲节";
holidays[6][26] = "国际禁毒日";
holidays[7][1] = "****诞辰";
holidays[8][1] = "建军节";
holidays[9][10] = "教师节";
holidays[10][1] = "国庆节";
holidays[11][23] = "感恩节";
holidays[12][1] = "艾滋病日";
holidays[12][12] = "西安事变";
holidays[12][25] = "圣诞节";
}
protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{
CalendarDay d = ((DayRenderEventArgs)e).Day;
TableCell c = ((DayRenderEventArgs)e).Cell;

if (e.Day.IsOtherMonth)
{
e.Cell.Controls.Clear();
}
else
{
try
{
string Hol = holidays[e.Day.Date.Month][e.Day.Date.Day];

if (Hol != string.Empty)
e.Cell.Controls.Add(new LiteralControl("
" + Hol + ""));
}
catch (Exception exc)
{
Response.Write(exc.ToString());
}
}
}
}

3、运行的效果如下：

来源:csdn