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怎么绑定当月所有周三的日期

2013-08-06 
如何绑定当月所有周三的日期?如何绑定当月所有周三的日期?绑定日期[解决办法]DateTime dtFirstnew DateTi

如何绑定当月所有周三的日期?
如何绑定当月所有周三的日期? 绑定日期
[解决办法]

    DateTime dtFirst=new DateTime(DateTime.Now.Year,DateTime.Now.Month,1);
for(DateTime dt=dtFirst;dt<=dtFirst.AddMonths(1).AddDays(-1);dt=dt.AddDays(1))
{
   if(dt.DayOfWeek==DayOfWeek.Wednesday)
   Console.WriteLine(dt.ToString());
}

[解决办法]
何谓绑定,获取本月所有周三倒是没问题
DateTime firstDay = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
            int weekDay = (int)firstDay.DayOfWeek;
            if (weekDay <= 3)
            {
                weekDay = 3 - weekDay;
            }
            else
            {
                weekDay = 7 - (weekDay - 3);
            }
            int monthDay = (firstDay.AddMonths(1) - firstDay).Days;
            List<DateTime> list = new List<DateTime>();
            for (int i = weekDay; i <= monthDay; i += 7)
            {
                list.Add(firstDay.AddDays(i));
            }

[解决办法]
 DateTime dtTemp = new DateTime();
            DateTime dt = DateTime.Now;


            DateTime dt_First = dt.AddDays(1 - (dt.Day));
            //获得某年某月的天数  
            int year = dt.Date.Year;
            int month = dt.Date.Month;
            int dayCount = DateTime.DaysInMonth(year, month);
            //本月最后一天时间  
            DateTime dt_Last = dt_First.AddDays(dayCount - 1);
            string dt_Firstweek = dt_First.DayOfWeek.ToString();
            List<DateTime> dtlist=new List<DateTime>();
            switch (dt_Firstweek)
            {
                case "Monday":
                    dtTemp = dt_First.AddDays(2);
                    break;
                case "Tuesday":
                    dtTemp = dt_First.AddDays(1);
                    break;
                case "Wednesday":
                    dtTemp = dt_First;
                    break;
                case "Thursday":
                     dtTemp = dt_First.AddDays(6);
                    break;
                case "Friday":


                    dtTemp = dt_First.AddDays(5);
                    break;
                case "Saturday":
                    dtTemp = dt_First.AddDays(4);
                    break;
                case "Sunday":
                    dtTemp = dt_First.AddDays(3);
                    break;
            }
            dtlist.Add(dtTemp);
            for (int i = 0; i < 5;i++)
            {
                dtTemp=dtTemp.AddDays(7);
                if (DateTime.Compare(dtTemp, dt_Last) == -1)
                {
                    dtlist.Add(dtTemp);
                }
            }
[解决办法]
也可以这样:

List<DateTime> list = new List<DateTime>();
            int days = DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month);
            for (int i = 0; i < days; i++)
            {
                DateTime dt = DateTime.Now.AddDays(-DateTime.Now.Day + 1 + i);


                if (dt.DayOfWeek == DayOfWeek.Wednesday)
                    list.Add(dt);
            }


[解决办法]
参考下面的方法,当然也可以获取星期三了:
http://www.cnblogs.com/insus/archive/2012/06/07/2541079.html

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