示例代碼：
<!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>無標題頁</title>
<style type="text/css" >
.hidden{ display:none;}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<%
NumWeeks(new DateTime(2009, 11, 15));
%>
<script runat="server" type="text/C#">
/// <summary>
/// 獲得本月有幾周
/// </summary>
/// <param name="a"></param>
/// <returns></returns>
public void NumWeeks(DateTime dt)
{
//年
int year = dt.Year;
//月
int month = dt.Month;
//當前月第一天
DateTime weekStart = new DateTime(year, month, 1);
//該月的最后一天
DateTime monEnd = weekStart.AddMonths(1).AddDays(-1);
int i = 1;
//當前月第一天是星期幾
int dayOfWeek = Convert.ToInt32(weekStart.DayOfWeek.ToString("d"));
//該月第一周結束日期
DateTime weekEnd = dayOfWeek == 0 ? weekStart : weekStart.AddDays(7 - dayOfWeek);
richTextBox2.Text += "第" + i + "周起始日期： " + weekStart.ToShortDateString() + " 結束日期： " + weekEnd.ToShortDateString() + "/n";
//當日期小于或等于該月的最后一天
while (weekEnd.AddDays(1) <= monEnd)
{
i++;
//該周的開始時間
weekStart = weekEnd.AddDays(1);
//該周結束時間
weekEnd = weekEnd.AddDays(7) > monEnd ? monEnd : weekEnd.AddDays(7);
richTextBox2.Text += "第" + i + "周起始日期： " + weekStart.ToShortDateString() + " 結束日期： " + weekEnd.ToShortDateString() + "/n";
}
richTextBox2.Text += year + "年" + month + "月共有" + i + "周/n";
}
</script>
<asp:TextBox ID="richTextBox2" runat="server" TextMode="MultiLine" Height="321px"
Width="845px" ></asp:TextBox>
</div>
</form>
</body>
</html>
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