获得任意两日期之间的有效工作日(不包括周六日) 获得任意两日期之间的有效工作日(不包括周六日)#region 获得任意两日期之间的有效工作日(不包括周六日)
//调用
//DateTime date1=Convert.ToDateTime("2005-10-20");
//DateTime date2=Convert.ToDateTime("2005-11-01");
//int days =getDays(date1,date2);
private int getDays(System.DateTime date1,System.DateTime date2)
{
string m=DateDiff(EnumDateCompare.day,date1,date2).ToString("f0");
int mm=0;
for(int i=0;i<=Convert.ToInt32(m);i++)
{
System.DateTime date=Convert.ToDateTime(date1.AddDays(i));
switch (date.DayOfWeek)
{
case System.DayOfWeek.Monday:
case System.DayOfWeek.Thursday:
case System.DayOfWeek.Tuesday:
case System.DayOfWeek.Wednesday:
case System.DayOfWeek.Friday:
mm=mm+1;
break;
}
}
return mm;
}
#endregion
格式输出
格式输出#region 格式输出
private void Page_Load(object sender, System.EventArgs e)
{
System.Globalization.DateTimeFormatInfo myDTFI = new System.Globalization.CultureInfo( "en-US", false ).DateTimeFormat;
//中国用zh-cn
DateTime myDT =System.DateTime.Now;
Response.Write(myDT.ToString("f",myDTFI));
/**//**//**//*
This code produces the following output.
FORMAT en-US EXAMPLE
CHAR VALUE OF ASSOCIATED PROPERTY, IF ANY
d 1/3/2002 M/d/yyyy (ShortDatePattern)
D Thursday, January 03, 2002 dddd, MMMM dd, yyyy (LongDatePattern)
f Thursday, January 03, 2002 12:00 AM
F Thursday, January 03, 2002 12:00:00 AM dddd, MMMM dd, yyyy h:mm:ss tt (FullDateTimePattern)
g 1/3/2002 12:00 AM
G 1/3/2002 12:00:00 AM
m January 03 MMMM dd (MonthDayPattern)
M January 03 MMMM dd (MonthDayPattern)
r Thu, 03 Jan 2002 00:00:00 GMT ddd, dd MMM yyyy HH':'mm':'ss 'GMT' (RFC1123Pattern)
R Thu, 03 Jan 2002 00:00:00 GMT ddd, dd MMM yyyy HH':'mm':'ss 'GMT' (RFC1123Pattern)
s 2002-01-03T00:00:00 yyyy'-'MM'-'dd'T'HH':'mm':'ss (SortableDateTimePattern)
t 12:00 AM h:mm tt (ShortTimePattern)
T 12:00:00 AM h:mm:ss tt (LongTimePattern)
u 2002-01-03 00:00:00Z yyyy'-'MM'-'dd HH':'mm':'ss'Z' (UniversalSortableDateTimePattern)
U Thursday, January 03, 2002 8:00:00 AM
y January, 2002 MMMM, yyyy (YearMonthPattern)
Y January, 2002 MMMM, yyyy (YearMonthPattern)
*/
}
#endregion
获得本周的周六和周日
ConvertDateToWeek#region ConvertDateToWeek
public static void ConvertDateToWeek(DateTime date,out DateTime firstdate,out DateTime lastdate)
{
DateTime first=System.DateTime.Now;
DateTime last=System.DateTime.Now;
switch (date.DayOfWeek)
{ case System.DayOfWeek.Monday:
first=date.AddDays(-1);
last=date.AddDays(5);
break;
case System.DayOfWeek.Tuesday:
first=date.AddDays(-2);
last=date.AddDays(4);
break;
case System.DayOfWeek.Wednesday:
first=date.AddDays(-3);
last=date.AddDays(3);
break;
case System.DayOfWeek.Thursday:
first=date.AddDays(-4);
last=date.AddDays(2);
break;
case System.DayOfWeek.Friday:
first=date.AddDays(-5);
last=date.AddDays(1);
break;
case System.DayOfWeek.Saturday:
first=date.AddDays(-6);
last=date;
break;
case System.DayOfWeek.Sunday:
first=date;
last=date.AddDays(6);
break;
}
firstdate=first;
lastdate=last;
}
#endregion
//调用
DateTime firstdate=System.DateTime.Now;
DateTime lastdate=System.DateTime.Now;
ConvertDateToWeek(date,out firstdate,out lastdate);
获得当前日期是该年度的第几周
DateTime dt = Convert.ToDateTime("2006-05-01");
int weeks = dt.DayOfYear / 7 + 1;
