ctlCalendar.ascx的源代码：

<%@ Control Language="c#" AutoEventWireup="false" Codebehind="ctlCalendar.ascx.cs" Inherits="calendar.ctlCalendar" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" enableViewState="True"%>
<asp:textbox id="TextBox1" runat="server"></asp:textbox>
<input type="button" id="Button1" runat="server" value="..."><br>
<asp:Panel id="pnlCalendar" runat="server" style="POSITION: absolute">
<asp:calendar id="Calendar1" runat="server" FirstDayOfWeek="Monday" ShowGridLines="True" BackColor="White"
DayNameFormat="Full" ForeColor="Black" Font-Size="8pt" Font-Names="Verdana" BorderColor="#999999"
CellPadding="4" Width="200px" Height="180px">
<TodayDayStyle ForeColor="Black" BackColor="#CCCCCC"></TodayDayStyle>
<SelectorStyle BackColor="#CCCCCC"></SelectorStyle>
<DayStyle Wrap="False" BorderStyle="Dashed"></DayStyle>
<NextPrevStyle VerticalAlign="Bottom"></NextPrevStyle>
<DayHeaderStyle Font-Size="X-Small" Font-Names="宋体" Wrap="False" BorderStyle="Dashed" BackColor="#CCCCCC"></DayHeaderStyle>
<SelectedDayStyle Font-Bold="True" ForeColor="White" BackColor="#666666"></SelectedDayStyle>
<TitleStyle Font-Size="Small" Font-Bold="True" BorderStyle="Solid" BorderColor="Black" BackColor="#999999"></TitleStyle>
<WeekendDayStyle BackColor="LightSteelBlue"></WeekendDayStyle>
<OtherMonthDayStyle ForeColor="Gray"></OtherMonthDayStyle>
</asp:calendar>
</asp:Panel>

ctlCalendar.ascx.cs的源代码：

namespace calendar
{
using System;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

/// <summary>
/// ctlCalendar 的摘要说明。
/// </summary>
public class ctlCalendar : System.Web.UI.UserControl
{
protected System.Web.UI.WebControls.TextBox TextBox1;
protected System.Web.UI.WebControls.Panel pnlCalendar;
protected System.Web.UI.HtmlControls.HtmlInputButton Button1;
protected System.Web.UI.WebControls.Calendar Calendar1;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if (!Page.IsPostBack)
{
this.TextBox1.Text = System.DateTime.Now.ToShortDateString();
this.pnlCalendar.Attributes.Add("style","DISPLAY: none; POSITION: absolute");
}
else
{
string id = Page.Request.Form["__EVENTTARGET"].Substring(0,Page.Request.Form["__EVENTTARGET"].IndexOf(":"));
if (id != this.ID)
{
this.pnlCalendar.Attributes.Add("style","DISPLAY: none; POSITION: absolute");
}
else
{
this.pnlCalendar.Attributes.Add("style","POSITION: absolute");
}

}

Page.RegisterClientScriptBlock("Script_Panel" + this.ID,
"<script> function On"+this.ID+"Click() { if("+this.ID+
"_pnlCalendar.style.display == \"none\") "+this.ID+
"_pnlCalendar.style.display = \"\"; else "+this.ID+
"_pnlCalendar.style.display = \"none\"; } </script>");