一个计算周次和本周时间范围的代码(c#)

//当天与该周星期一相差的天数   private int getModdayNum(System.DayOfWeek dw)   {    int weeknow = Convert.ToInt32(dw);    int moddayNum = (-1) * weeknow+1;    return moddayNum;   }

  //当天与该周星期日相差的天数   private int getSundayNum(System.DayOfWeek dw)   {    int weeknow = Convert.ToInt32(dw);    int sundayNum = 7-weeknow;    return sundayNum;   }

  //该周星期一的日期   private string getWeekMonday(System.DayOfWeek dw,string timeFormateStr)   {    int weeknow = Convert.ToInt32(dw);    int moddayNum = (-1) * weeknow+1;    string weekMonday = System.DateTime.Now.AddDays(moddayNum).Date.ToString(timeFormateStr);    return weekMonday;   }

  //该周星期日的日期   private string getWeekSunday(System.DayOfWeek dw,string timeFormateStr)   {    int weeknow = Convert.ToInt32(dw);    int sundayNum = 7-weeknow;    string weekSunday = System.DateTime.Now.AddDays(sundayNum).Date.ToString(timeFormateStr);    return weekSunday;   }

  //本周是本年第几周   private int weekNum(System.DayOfWeek dw)   {    int weeknow = Convert.ToInt32(dw);//今天星期几    int daydiff = (-1) * (weeknow+1);//今日与上周末的天数差    int days = System.DateTime.Now.AddDays(daydiff).DayOfYear;//上周末是本年第几天    int weeks = days/7;    if(days%7 != 0)    {     weeks++;    }    return (weeks+2);   }

   //调用方法    string datetime = getWeekMonday(System.DateTime.Now.DayOfWeek,"yyyy-MM-dd");

一个计算周次和本周时间范围的代码(c#)     

转载于:https://www.cnblogs.com/antony1029/archive/2008/02/17/1071612.html

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