C＃中获得的启动日期和最后日期基于当前日期 [英] c# get start-date and last-date based on current date

问题描述

我做基于最新活动监测器，类似于计算器今天，昨天，本周，上周，本月，上月 .....基于当前日期如何获得开始日期和结束日期所有这些今天昨天，本周，上周，本月，上月在C＃？

解决方案

 的DateTime baseDate = DateTime.Today; $ B今天
 $ B VAR = baseDate; 
变种昨日= baseDate.AddDays（-1）; 
 VAR thisWeekStart = baseDate.AddDays（ - （INT）baseDate.DayOfWeek）; 
变种thisWeekEnd = thisWeekStart.AddDays（7）.AddSeconds（-1）; 
 VAR lastWeekStart = thisWeekStart.AddDays（-7）; 
变种lastWeekEnd = thisWeekStart.AddSeconds（-1）; 
 VAR thisMonthStart = baseDate.AddDays（1  -  baseDate.Day）; 
变种thisMonthEnd = thisMonthStart.AddMonths（1）.AddSeconds（-1）; 
变种lastMonthStart = thisMonthStart.AddMonths（-1）; 
变种lastMonthEnd = thisMonthStart.AddSeconds（-1）; 
  

I am doing an activity monitor based on date which is similar to stackoverflow Today,YesterDay,this week,Last week,this month,last Month..... Based on current date how to get start-date and end-date for all these Today,YesterDay,this week,Last week,this month,last Month in c#?

解决方案

DateTime baseDate = DateTime.Today;

var today = baseDate;
var yesterday = baseDate.AddDays(-1);
var thisWeekStart = baseDate.AddDays(-(int)baseDate.DayOfWeek);
var thisWeekEnd = thisWeekStart.AddDays(7).AddSeconds(-1);
var lastWeekStart = thisWeekStart.AddDays(-7);
var lastWeekEnd = thisWeekStart.AddSeconds(-1);
var thisMonthStart = baseDate.AddDays(1 - baseDate.Day);
var thisMonthEnd = thisMonthStart.AddMonths(1).AddSeconds(-1);
var lastMonthStart = thisMonthStart.AddMonths(-1);
var lastMonthEnd = thisMonthStart.AddSeconds(-1);

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