假设，有两个页子selectdate.aspx,calendar.aspx.
需要在selectdate.aspx做个连接，点击后打开calendar.aspx，然后在calendar.aspx中选择日期，将选择的日期返回给
selectdate.aspx（呵呵，不知道我说明白没有）
算了，看看代码吧，自然就明白了。
对了，还需要个文件用来装javascript的script.js
===============================================================================================
selectdate.aspx
----------------------------------------
<%@ page language="c#" codebehind="detail.aspx.cs" autoeventwireup="false" inherits="calendar.detail" %>
<!doctype html public "-//w3c//dtd html 4.0 transitional//en" >
<html>
<head>
<title>detail</title>
<meta name="generator" content="microsoft visual studio .net 7.1">
<meta name="code_language" content="c#">
<meta name="vs_defaultclientscript" content="javascript">
<meta name="vs_targetschema" content="http://schemas.microsoft.com/intellisense/ie5">
<script language="javascript" src="script.js"></script>
</head>
<body>
<form id="form1" method="post" runat="server">
<asp:textbox id="completiondate" style="z-index: 101; left: 120px; position: absolute; top: 72px"
runat="server"></asp:textbox>
<a href="javascript:opencalendar(completiondate, true)"><img style="z-index: 102; left: 296px; width: 24px; position: absolute; top: 72px; height: 16px"
height="16" alt="" src="img/calendar.gif" width="24"></a>
</form>
</body>
</html>
--------------------------------------------------------------------
selectdate.aspx.cs
----------------------------------------------------------------------
sing system;
using system.collections;
using system.componentmodel;
using system.data;
using system.drawing;
using system.web;
using system.web.sessionstate;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.htmlcontrols;
namespace calendar
{
/// <summary>
/// detail 的摘要说明。
/// </summary>
public class detail : system.web.ui.page
{
protected system.web.ui.webcontrols.textbox completiondate;
private void page_load(object sender, system.eventargs e)
{
// 在此处放置用户代码以初始化页面
}
#region web 窗体设计器生成的代码
override protected void oninit(eventargs e)
{
//
// codegen: 该调用是 asp.net web 窗体设计器所必需的。
//
initializecomponent();
base.oninit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void initializecomponent()
{
this.load += new system.eventhandler(this.page_load);
}
#endregion
}
}
===========================================================================
calendar.aspx
=========================================================================
<%@ page language="c#" codebehind="calendar.aspx.cs" autoeventwireup="false" inherits="calendar.webform1" %>
<!doctype html public "-//w3c//dtd html 4.0 transitional//en" >
<html>
<head>
<title>webform1</title>
<meta name="generator" content="microsoft visual studio .net 7.1">
<meta name="code_language" content="c#">
<meta name="vs_defaultclientscript" content="javascript">
<meta name="vs_targetschema" content="http://schemas.microsoft.com/intellisense/ie5">
<script language="javascript">
function closewindow()
{
self.close();
}
</script>
</head>
<body>
<form id="calendar" method="post" runat="server">
<asp:calendar id="cal" style="z-index: 101; left: 96px; position: absolute; top: 16px" runat="server"
borderwidth="1px" backcolor="#ffffcc" width="220px" daynameformat="firstletter" forecolor="#663399"
height="200px" font-size="8pt" font-names="verdana" bordercolor="#ffcc66" showgridlines="true">
<todaydaystyle forecolor="white" backcolor="#ffcc66"></todaydaystyle>
<selectorstyle backcolor="#ffcc66"></selectorstyle>
<nextprevstyle font-size="9pt" forecolor="#ffffcc"></nextprevstyle>
<dayheaderstyle height="1px" backcolor="#ffcc66"></dayheaderstyle>
<selecteddaystyle font-bold="true" backcolor="#ccccff"></selecteddaystyle>
<titlestyle font-size="9pt" font-bold="true" forecolor="#ffffcc" backcolor="#990000"></titlestyle>
<othermonthdaystyle forecolor="#cc9966"></othermonthdaystyle>
</asp:calendar>
<asp:button id="okbutton" style="z-index: 102; left: 96px; position: absolute; top: 224px" runat="server"
text="o k"></asp:button>
<a href="javascript:closewindow()">
<asp:button id="cancelbutton" style="z-index: 103; left: 136px; position: absolute; top: 224px"
runat="server" text="cancel"></asp:button>
</a>
<asp:label id="lbldate" style="z-index: 104; left: 216px; position: absolute; top: 232px" runat="server"></asp:label>
<asp:dropdownlist id="monthselect" style="z-index: 105; left: 96px; position: absolute; top: 256px"
runat="server" autopostback="true"></asp:dropdownlist>
<asp:dropdownlist id="yearselect" style="z-index: 106; left: 248px; position: absolute; top: 256px"
runat="server" autopostback="true"></asp:dropdownlist>
<input id="datechosen" type="hidden" name="datechosen" runat="server"> //这个很重要
</form>
</body>
</html>
---------------------------------------------------------------------------------------------------------------------------
calendar.aspx.cs
--------------------------------------------------------------------------------------------------------------------------
using system;
using system.collections;
using system.componentmodel;
using system.data;
using system.drawing;
using system.web;
using system.web.sessionstate;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.htmlcontrols;
using system.configuration;
namespace calendar
{
/// <summary>
/// webform1 的摘要说明。
/// </summary>
public class webform1 : system.web.ui.page
{
protected system.web.ui.webcontrols.calendar cal;
protected system.web.ui.webcontrols.button okbutton;
protected system.web.ui.webcontrols.button cancelbutton;
protected system.web.ui.webcontrols.label lbldate;
protected system.web.ui.webcontrols.dropdownlist monthselect;
protected system.web.ui.htmlcontrols.htmlinputhidden datechosen;
protected system.web.ui.webcontrols.dropdownlist yearselect;
private void page_load(object sender, system.eventargs e)
{
if (!page.ispostback)
{
string selected = request.querystring["selected"];
string id = request.querystring["id"];
string form = request.querystring["formname"];
string postback = request.querystring["postback"];
cal.firstdayofweek = (system.web.ui.webcontrols.firstdayofweek)1;//(system.web.ui.webcontrols.firstdayofweek)convert.toint32(configurationsettings.appsettings[global.cfgkeyfirstdayofweek]);
try
{
cal.selecteddate = cal.visibledate = convert.todatetime(selected);
}
catch
{
cal.selecteddate = cal.visibledate = datetime.today;
}
fillcalendarchoices();
selectcorrectvalues();
okbutton.attributes.add("onclick", "window.opener.setdate(" + form + "," + id + ", document.calendar.datechosen.value," + postback + ");");
cancelbutton.attributes.add("onclick", "closewindow()");
}// 在此处放置用户代码以初始化页面
}
private void fillcalendarchoices()
{
datetime thisdate = new datetime(datetime.today.year,1,1);
for (int x=0; x<12; x++)
{
listitem li = new listitem(thisdate.tostring("mmmm"), thisdate.month.tostring());
monthselect.items.add(li);
thisdate = thisdate.addmonths(1);
}
for (int y=1994; y <= thisdate.year; y++)
{
yearselect.items.add(y.tostring());
}
}
private void selectcorrectvalues()
{
lbldate.text = cal.selecteddate.toshortdatestring();
datechosen.value = lbldate.text;
monthselect.selectedindex = monthselect.items.indexof(monthselect.items.findbyvalue(cal.selecteddate.month.tostring()));
yearselect.selectedindex = yearselect.items.indexof(yearselect.items.findbyvalue(cal.selecteddate.year.tostring()));
}
private void cal_selectionchanged(object sender, system.eventargs e)
{
cal.visibledate = cal.selecteddate;
selectcorrectvalues();
}
private void monthselect_selectedindexchanged(object sender, system.eventargs e)
{
cal.selecteddate = cal.visibledate
= new datetime(convert.toint32(yearselect.selecteditem.value),
convert.toint32(monthselect.selecteditem.value), 1);;
selectcorrectvalues();
}
private void yearselect_selectedindexchanged(object sender, system.eventargs e)
{
cal.selecteddate = cal.visibledate
= new datetime(convert.toint32(yearselect.selecteditem.value),
convert.toint32(monthselect.selecteditem.value), 1);;
selectcorrectvalues();
}
#region web 窗体设计器生成的代码
override protected void oninit(eventargs e)
{
//
// codegen: 该调用是 asp.net web 窗体设计器所必需的。
//
initializecomponent();
base.oninit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void initializecomponent()
{
this.cal.selectionchanged += new system.eventhandler(this.cal_selectionchanged);
//this.okbutton.click += new system.eventhandler(this.okbutton_click);
//this.cancelbutton.click += new system.eventhandler(this.cancelbutton_click);
this.monthselect.selectedindexchanged += new system.eventhandler(this.monthselect_selectedindexchanged);
this.yearselect.selectedindexchanged += new system.eventhandler(this.yearselect_selectedindexchanged);
this.load += new system.eventhandler(this.page_load);
this.id = "calendar";
}
#endregion
private void cancelbutton_click(object sender, system.eventargs e)
{
}
private void okbutton_click(object sender, system.eventargs e)
{
}
}
}
==========================================================================================
script.js
===================================================================================
var popup;
function opencalendar(idname, postback)
{
popup = window.open(calendar.aspx?formname= + document.forms[0].name +
&id= + idname + &selected= + document.forms[0].elements[idname].value + &postback= + postback,
popupcal,
width=285,height=420,left=200,top=250);
}
function setdate(formname, id, newdate, postback)
{
eval(var theform = document. + formname + ;);
popup.close();
theform.elements[id].value = newdate;
if (postback)
__dopostback(id,);
}
=============================================================================
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