C#.NET里如何或得当前周的数字？

shinedew 2006-11-27 01:52:30

想获取当前日期是这一年的第几周，代码如何实现？

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dingxu_ren 2006-11-27

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DateTime now = DateTime.Now;
int i = (now.DayOfYear - (int)now.DayOfWeek) / 7 + 1;

viena 2006-11-27

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private int getWeekNum(DateTime dt)
{
DateTime dt1 = new DateTime(dt.Year,1,1);
TimeSpan ts = dt - dt1;
return (ts.Days+(int)dt1.DayOfWeek) / 7 + 1;
}

yx10 2006-11-27

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DeanMonica(夏天的叶子) 的方法是对的!

早起晚睡 2006-11-27

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weekOfYear=DateTime.Now.DayOfYear/7+1;有错

ji_vicky 2006-11-27

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weekOfYear=DateTime.Now.DayOfYear/7+1;
因該沒錯吧？

DeanMonica 2006-11-27

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上面打错了

using System.Globalization;

CultureInfo myCI = new CultureInfo("zh-CN");
System.Globalization.Calendar myCal = myCI.Calendar;

//日期格式
CalendarWeekRule myCWR = myCI.DateTimeFormat.CalendarWeekRule;
DayOfWeek myFirstDOW = DayOfWeek.Monday;
//本周为第myCal.GetWeekOfYear( DateTime.Now, myCWR, myFirstDOW )周
int thisWeek = myCal.GetWeekOfYear(DateTime.Now, myCWR, myFirstDOW);

DeanMonica 2006-11-27

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using System.Globalization;

CultureInfo CaI = new CultureInfo("zh-CN");
Calendar myCal = myCaI.Calendar;

//日期格式
CalendarWeekRule myCWR = myCI.DateTimeFormat.CalendarWeekRule;
DayOfWeek myFirstDOW = DayOfWeek.Monday;
//本周为第周周数
int thisWeek = myCal.GetWeekOfYear(DateTime.Now, myCWR, myFirstDOW);

shinedew 2006-11-27