c#得到本月有几周和这几周的起止时间示例代码

程序员文章站 2024-02-25 21:57:57

示例代码：复制代码代码如下:<%@ page language="c#" autoeventwireup="true" codebehind="default.as...

示例代码：

<%@ page language="c#" autoeventwireup="true" codebehind="default.aspx.cs" inherits="webapplication1._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>
    <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>
             /// 获得本月有几周
             /// </summary>
             /// <param name="a"></param>
             /// <returns></returns>
             public void numweeks(datetime dt)
             {
                 //年
                 int year = dt.year;
                 //月
                 int month = dt.month;
                 //当前月第一天
                 datetime weekstart = new datetime(year, month, 1);
                 //该月的最后一天
                 datetime monend = weekstart.addmonths(1).adddays(-1);
                 int i = 1;
                 //当前月第一天是星期几
                 int dayofweek = convert.toint32(weekstart.dayofweek.tostring("d"));
                 //该月第一周结束日期
                 datetime weekend = dayofweek == 0 ? weekstart : weekstart.adddays(7 - dayofweek);

                 richtextbox2.text += "第" + i + "周起始日期： " + weekstart.toshortdatestring() + "   结束日期： " + weekend.toshortdatestring() + "\n";

                 //当日期小于或等于该月的最后一天
                 while (weekend.adddays(1) <= monend)
                 {
                     i++;
                     //该周的开始时间
                     weekstart = weekend.adddays(1);
                     //该周结束时间
                     weekend = weekend.adddays(7) > monend ? monend : weekend.adddays(7);

                     richtextbox2.text += "第" + i + "周起始日期： " + weekstart.toshortdatestring() + "   结束日期： " + 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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