按月获取一年组中所有周的列表

Question

我正在开发一个网络表单应用程序，我需要列出一年中的所有星期，条件如下：

• 一周从星期一开始，到星期日结束。

• 按月分组

• 按降序（较新的日期在顶部）排序直到今天（它应该显示包括今天日期在内的周间隔）

• 列出的每个星期间隔都是指向新页面的链接 - detail.aspx（我需要捕获 并将开始和结束日期传递给链接，以便我可以检索它 使用查询字符串的新页面）

这是我要归档的输出，例如：从 2015 年初（从 2015 年 1 月 5 日星期一开始）到今天 2015 年 7 月 29 日，它应该是这样的。我只6 月和 7 月的详细信息，但其余的应该是一样的。

2015 年 7 月

Monday (July, 27) - Sunday (August, 2) <= (each of these is a link)
Monday (July, 20) - Sunday (July, 26)
Monday (July, 13) - Sunday (July, 19)  
Monday (July, 6) - Sunday (July, 12)

2015 年 6 月

Monday (June, 29) - Sunday (July, 5)
Monday (June, 22) - Sunday (June, 28)
Monday (June, 15) - Sunday (June, 21) 
Monday (June, 8) - Sunday (June, 14)
Monday (June, 1) - Sunday (June, 7)    

五月到一月应该是一样的...

这就是我现在拥有的：

DateTime counter = new DateTime(2015, 1, 5); // first week of 2015 start on Monday Jan 5 2015
        while (counter <= DateTime.Now)
        {
            DateTime startDate = counter;
            DateTime endDate = startDate.AddDays(6);
            Response.Write("<a href=\"/details.aspx?start=" + startDate.ToShortDateString() + "&end=" + endDate.ToShortDateString() + "\" target=\"_blank\">" + startDate.ToLongDateString() + " - " + endDate.ToLongDateString() + "<br>");
            counter = endDate.AddDays(1);
        }

它输出这个：

如何修复我的循环以将其反转，以便较新的日期位于顶部，并按月对列表进行分组/分隔

Answer 1

这里有你自己的代码，我只是添加了几个变量，我觉得它更具可读性

DateTime counter = new DateTime(2015, 1, 5); // first week of 2015 start on Monday Jan 5 2015
int currentMonth = counter.Month;
List<string> rows = new List<string>();
while (counter <= DateTime.Now)
{
    DateTime startDate = counter;
    DateTime endDate = startDate.AddDays(6);
    if (!startDate.Month.Equals(currentMonth))
    {   //When the month change it writes the name of the new month
        rows.Add("<br>" + startDate.AddMonths(-1).ToString("MMMM"));
        currentMonth++;
    }
    //I delete your '<br>' at the end to use it in the Join(), also you were missing the closing tag '</a>'
    rows.Add("<a href='/details.aspx?start=" + startDate.ToShortDateString() + "&end=" + endDate.ToShortDateString() + "' target='_blank'>" + startDate.ToLongDateString() + " - " + endDate.ToLongDateString() + "</a>");
    counter = endDate.AddDays(1);
}
rows.Reverse(); //Reverse the order of the array
Response.Write(string.Join("<br>", rows.ToArray())); // Join the array in one line to just call one time the ResponseWrite

Answer 2

你反转循环：

int delta = DayOfWeek.Monday - DateTime.Now.DayOfWeek; // finds the difference between today and the monday of this week
DateTime counter = DateTime.Now.AddDays(delta); // sets the counter the first day of this week.

int currentMonth = DateTime.Now.Month; // current month as integer.

while (counter >= new DateTime(2015, 1, 5))
{
    if (currentMonth != counter.Month)
    {
        response.Write("my dividing text");// put your html here
        currentMonth = counter.Month;
    }

    DateTime startDate = counter;
    DateTime endDate = startDate.AddDays(6);

    Response.Write("<a href=\"/details.aspx?start=" 
        + startDate.ToShortDateString() + "&end=" + endDate.ToShortDateString() 
        + "\" target=\"_blank\">" + startDate.ToLongDateString() + " - " 
        + endDate.ToLongDateString() + "<br>");

    counter = startDate.AddDays(-7);
 }