Question

我有两个文本框，用于选择From和a To日期。我需要一个循环，其中外循环将持续一年，内循环将运行每个月。

问题在于下面的代码，如果我选择11/01/2011和06/30/2012，我的月份循环会在第11个月运行一次。之后循环退出..感谢任何帮助。

我正在使用下面的代码查看SharePoint日历列表（使用CAML查询）并获取连续3天，5天连续几天某个房间可用，不包括周末。想法是使用CAML查询来获取每个月的免费天数，并一直重复到最后一个月。

int year = 0, month = 0; 
for (year = Calendar1.SelectedDate.Year; year <= Calendar2.SelectedDate.Year; year++)
{
  int i = year;
  for (month = Calendar1.SelectedDate.Month; month <= Calendar2.SelectedDate.Month; month++)
  {
    int j = month;
  }
}

Answer 1

这样的事情会起作用吗？

for (DateTime date = Calendar1.SelectedDate; date < Calendar2.SelectedDate; date = date.AddMonths(1))
{
 //code
}

Answer 2

如果我理解正确，您希望在两个日期之间迭代每个月。如果是这样，这应该有效：

var dt2 = Calendar2.SelectedDate.Year;
var current = Calendar1.SelectedDate;
while (current < dt2)
{
  current = current.AddMonths(1);
  //do your work for each month here
}

Answer 3

内循环的起始和结束编号应该是有条件的。

如果你在开始年份，那么开始月份应该是选定的月份;否则它应该是1.

如果您在结束年份，那么结束月份应该是选定的月份;否则它应该是12。

示例：

var startYear = Calendar1.SelectedDate.Year;
var endYear = Calender2.SelectedDate.Year;
var startMonth = Calender1.SelectedDate.Month;
var endMonth = Calender2.SelectedDate.Month;

for (var year = startYear; year <= endYear; year++)
{
    var sm = year == startYear ? startMonth : 1;
    var em = year == endYear ? endMonth : 12;

    for (var month = sm; month <= em; month++)
    {

    }    
}

Answer 4

对于开始年份，您需要从适当的月份开始内循环，并运行所有12个月，除非在结束年份，您应该运行到适当的月份。这样的事情应该有效：

int year = 0, month = 0;    
for (year = Calendar1.SelectedDate.Year; year <= Calendar2.SelectedDate.Year; year++)
{
    int i = year;

    for (month = (i==Calendar1.SelectedDate.Year ? Calendar1.SelectedDate.Month : 1); month <= (i==Calendar2.SelectedDate.Year ? Calendar2.SelectedDate.Month : 12); month++)
    {
        int j = month;
    }
}

Answer 5

//Function return First day in Month For Date --example : 01-09-2012

public static  DateTime FirstDayOfMonthFromDateTime(DateTime dateTime)
     {
         return new DateTime(dateTime.Year, dateTime.Month, 1);

     }

//code used to loop throw a Date range for each month
DateTime FirstDayInMonth = FirstDayOfMonthFromDateTime(Date);
DateTime TempDay = FirstDayInMonth;
int days = DateTime.DaysInMonth(FirstDayInMonth.Year, FirstDayInMonth.Month);

for (int i = 0; i < days; i++)
   {
     System.Out.Println(TempDay.toString());
     TempDay.AddDays(1);
   }

//then used code for each month in year (simple loop from 1-12)..

在每个月和每天的日期范围内循环

5 个答案: