使用日期時間，檢查預約在本週

Question

我有檢查有多少訂單必須在當月的方法：

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

是否有可能做本期周相似的地方？我如何檢查本週完成的預訂數量？

Answer 1

如果你有「項目」的一個DateTime屬性的集合，你要計算這個星期全部的，這應該工作：

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));