使用日期时间查看本周的预订

Question

我有一个检查当月有多少预订的方法：

if (item.DateTimeScheduled.Month == DateTime.Now.Month)

本周是否有可能做类似的事情？如何查看本周完成的预订数量？

Answer 1

如果你有一个带有DateTime属性的"Items"集合，并且你想计算本周的所有时间，这应该可以工作：

var calendar = DateTimeFormatInfo.CurrentInfo.Calendar;
var weekRule = DateTimeFormatInfo.CurrentInfo.CalendarWeekRule;
var firstDay = DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek;
int week = calendar.GetWeekOfYear(DateTime.Today, weekRule, firstDay);
int thisWeekBookings = items
    .Count(i => i.DateTimeScheduled.Year == DateTime.Today.Year &&
        week == calendar.GetWeekOfYear(i.DateTimeScheduled, weekRule, firstDay));