C＃DatePart（）？ [英] C# DatePart() ?

问题描述

嗨！


我正在将一些VB类的方法转换为另一个

项目的C＃类。这很容易，但是当转换方法返回最后一个

周数时，我遇到了问题。 VB代码是...


私有函数GetLastWeek（ByVal year As Integer）作为整数

''//获取一年中的最后一天

Dim dte As DateTime = New DateTime（年，12,31）

''//返回一年中最后一天的周数

返回dte。年* 100 + DatePart（DateInterval.WeekOfYear，dte，

FirstDayOfWeek.Monday，FirstWeekOfYear.System）

结束功能


如何使用C＃执行此操作，因为下面的代码不起作用

因为DatePart不适用于C＃？


private int GetLastWeek（int year）

{

//获取一年中的最后一天

DateTime d = new DateTime（年，12,31）;

//返回一年中最后一天的周数

返回d.Year * 100 + DatePart（DateInterval.WeekOfYear，d，

FirstDayOfWeek.Monday，FirstWeekOfYear.System）;

}


- -

提前致谢！


Mika

解决方案

在星期二， 2007年6月5日00：37：50 -0700，Mika M< ma *************** @ luukku.com

写道：
< blockquote class =post_quotes>
[...]

如何使用C＃执行此操作，因为下面的代码不起作用

因为DatePart ;在C＃中不可用？

我认为你正在寻找Calendar课程。例如：


private int GetLastWeek（int year）

{

//获取一年中的最后一天
DateTime d = new DateTime（年，12,31）;

//返回一年中最后一天的周数

返回d.Year * 100 +

GregorianCalendar.GetWeekOfYear（d，

DateTimeFormatInfo.Current.CalendarWeekRule，DayOfWeek.Monday）;

}


以上明确使用公历，但如果您因某种原因需要处理另外的

日历，您也可以使用

CurrentCulture.Calendar。


Pete

6月5日上午9:42，Peter Duniho < NpOeStPe ... @nnowslpianmk.com>

写道：

2007年6月5日星期二00:37:50 -0700 ，Mika M< mahmik_removet ... @ luukku.com>

写道：

[...]

如何使用C＃执行此操作，因为下面的代码不起作用

因为DatePart在C＃中不可用？

我认为你正在寻找Calendar课程。例如：


private int GetLastWeek（int year）

{

//获取一年中的最后一天
DateTime d = new DateTime（年，12,31）;

//返回一年中最后一天的周数

返回d.Year * 100 +

GregorianCalendar.GetWeekOfYear（d，

DateTimeFormatInfo.Current.CalendarWeekRule，DayOfWeek.Monday）;

}

小修正 - GetWeekOfYear并非静态，并且DateTimeFormatInfo中没有当前

属性：


private static int GetLastWeek（int year）

{

//获取一年中的最后一天

DateTime d = new DateTime（year，12， 31）;

//返回一年中最后一天的周数

GregorianCalendar calendar = new GregorianCalendar（）;

return d.Year * 100 +

calendar.GetWeekOfYear（d，

DateTimeFormatInfo.CurrentInfo.Calen darWeekRule，

DayOfWeek.Monday）;

}


Jon

2007年6月5日星期二02:02:24 -0700，Jon Skeet [C＃MVP]< sk *** @ pobox.com>

写道：

小修正 - GetWeekOfYear不是静态的，并且DateTimeFormatInfo中没有Current

属性：

教我这么晚才发帖。谢谢。 :)

Hi!

I''m converting some methods of VB-class into C#-class for another
project. It''s quite easy, but when converting method which returns last
week number of the entered year I got problems. The VB code is...

Private Function GetLastWeek(ByVal year As Integer) As Integer
''// Get last day of the year
Dim dte As DateTime = New DateTime(year, 12, 31)
''// Return last day weeknumber of the year
Return dte.Year * 100 + DatePart(DateInterval.WeekOfYear, dte,
FirstDayOfWeek.Monday, FirstWeekOfYear.System)
End Function

How to do this using C# because the following code below is not working
because "DatePart" is not available in C#?

private int GetLastWeek(int year)
{
// Get last day of the year
DateTime d = new DateTime(year, 12, 31);
// Return last day weeknumber of the year
return d.Year * 100 + DatePart(DateInterval.WeekOfYear, d,
FirstDayOfWeek.Monday, FirstWeekOfYear.System);
}

--
Thanks in advance!

Mika

解决方案

On Tue, 05 Jun 2007 00:37:50 -0700, Mika M <ma***************@luukku.com
wrote:

[...]
How to do this using C# because the following code below is not working
because "DatePart" is not available in C#?

I think you are looking for the Calendar class. For example:

private int GetLastWeek(int year)
{
// Get last day of the year
DateTime d = new DateTime(year, 12, 31);
// Return last day weeknumber of the year
return d.Year * 100 +
GregorianCalendar.GetWeekOfYear(d,
DateTimeFormatInfo.Current.CalendarWeekRule, DayOfWeek.Monday);
}

The above explicitly uses the Gregorian calendar, but you could also use
CurrentCulture.Calendar if you wanted for some reason to handle alternate
calendars.

Pete

On Jun 5, 9:42 am, "Peter Duniho" <[e-mail]>
wrote:

On Tue, 05 Jun 2007 00:37:50 -0700, Mika M <[e-mail]>
wrote:

[...]
How to do this using C# because the following code below is not working
because "DatePart" is not available in C#?

I think you are looking for the Calendar class. For example:

private int GetLastWeek(int year)
{
// Get last day of the year
DateTime d = new DateTime(year, 12, 31);
// Return last day weeknumber of the year
return d.Year * 100 +
GregorianCalendar.GetWeekOfYear(d,
DateTimeFormatInfo.Current.CalendarWeekRule, DayOfWeek.Monday);
}

Small corrections - GetWeekOfYear isn''t static, and there''s no Current
property in DateTimeFormatInfo:

private static int GetLastWeek(int year)
{
// Get last day of the year
DateTime d = new DateTime(year, 12, 31);
// Return last day weeknumber of the year
GregorianCalendar calendar = new GregorianCalendar();
return d.Year * 100 +
calendar.GetWeekOfYear(d,
DateTimeFormatInfo.CurrentInfo.CalendarWeekRule,
DayOfWeek.Monday);
}

Jon

On Tue, 05 Jun 2007 02:02:24 -0700, Jon Skeet [C# MVP] <sk***@pobox.com>
wrote:

Small corrections - GetWeekOfYear isn''t static, and there''s no Current
property in DateTimeFormatInfo:

Teach me to post so late. Thanks. :)

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