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给定日期的月发电量

datediff asp-classic vbscript

Hanz Cheah · 技术社区 · 7 年前

努力实现

我在代码上定了一个日期,比如2019年1月31日。然后每天我都会执行我的代码,但只有在2019年2月28日/2020年2月29日、2019年3月31日、2019年4月30日……我想执行代码。有点像一代一代。此外,如果固定日期是2019年1月30日,我希望在2019年2月28日/2020年2月29日、2019年3月30日、2019年4月30日执行代码……

例如

我所做的

我一直在关注这个问题 VBScript DateDiff month ,并已尝试以下代码,但它不起作用。

如果我有一个日期,比如说2010年1月31日

endFeb = DateAdd("m",1,"31-Jan-10")
endMar = DateAdd("m",1,endFeb)
endApr = DateAdd("m",1,endMar)

结果

endFeb: 28/02/2010
endMar: 28/03/2010
endApr: 28/04/2010

我想要的是

endFeb: 28/02/2010
endMar: 31/03/2010
endApr: 30/04/2010

代码

sFixedDate = "2019-01-31" '==== Fixed
sProcessDate = "2019-02-28"  '==== Changes daily

d1 = CDate(sFixedDate)
d2 = CDate(sProcessDate)

diff = DateDiff("m", d1, d2)

If request("btnProcess") <> "" Then
    If diff Mod 1 = 0 Then  '=== Not as simple as I thought
        '=== Trying to do monthly GENERATION. 
        '===Excecute the CODE
    End If
End If

4 回复 | 直到 7 年前

Ansgar Wiechers 7 年前

基本上,你想在每个月的最后一天运行一些东西。意思是后一天将是另一个月,所以您可以这样计算下个月的最后一天:

today    = Date
tomorrow = today + 1
If request("btnProcess") <> "" Then
    If Month(today) <> Month(tomorrow) Then
        endNextMonth = DateAdd("m", 1, tomorrow) - 1
    End If
End If

若要获取任何给定月份的最后一天,请调整要添加到明天日期的月份数。

上面的假设是你在一个月的最后一天做计算。如果要计算某个月的最后一天,请参见 Ekkehard Horner's answer .

Ekkehard.Horner 7 年前

使用日期序列号:

For m = 1 To 13
     d1 = DateSerial(2019, m, 1) ' First day of month is easy
     d2 = DateAdd("d", d1, -1)   ' Last day of previous month is just 1 day before
     WScript.Echo m, d1, d2
Next

cscript lom.vbs
1 01.01.2019 31.12.2018
2 01.02.2019 31.01.2019
3 01.03.2019 28.02.2019
4 01.04.2019 31.03.2019
5 01.05.2019 30.04.2019
6 01.06.2019 31.05.2019
7 01.07.2019 30.06.2019
8 01.08.2019 31.07.2019
9 01.09.2019 31.08.2019
10 01.10.2019 30.09.2019
11 01.11.2019 31.10.2019
12 01.12.2019 30.11.2019
13 01.01.2020 31.12.2019

Joe Ka'ainoa 7 年前

似乎对于给定的开始日期,您希望计算未来x个月的新日期是什么,如果开始日期大于未来月份,则给出该月份的最后一天。

    Function CalculateFutureDate(startDate, monthsInFuture)
        ' Assumes startDate is in the past
        Dim dtRepeatDate
        Dim dtNewDate
        If (IsDate(startDate)) Then
            dtRepeatDate = CDate(startDate)
            ' months between now and Start Date
            Dim intMonthsToAdd
            Dim dtCurrentDate
            dtCurrentDate = Now()
            intMonthsToAdd = DateDiff("m", startDate, dtCurrentDate)
            If intMonthsToAdd > 0 And Day(startDate) < Day(dtCurrentDate) Then
                intMonthsToAdd = intMonthsToAdd - 1
            End If
            ' Add the future months to the month offset
            intMonthsToAdd = intMonthsToAdd + monthsInFuture
            ' Now calculate future date
            dtNewDate = DateAdd("m", intMonthsToAdd, dtRepeatDate)
            CalculateFutureDate = dtNewDate
        End If
    End Function

然后你可以这样做:

CalculateFutureDate(CDate("2019-01-31"), intFutureMonths)

这将输出:

?CalculateFutureDate(CDate("2019-01-31"), 1)
2/28/2019
?CalculateFutureDate(CDate("2019-01-31"), 2)
3/31/2019
?CalculateFutureDate(CDate("2019-01-31"), 3)
4/30/2019

-1

Hanz Cheah 7 年前

    dtLoan = CDate("2019-01-30")
    dtProcess = CDate ("2020-02-28")

    'dtLoan = CDate("2019-01-31")
    'dtProcess = CDate ("2020-02-29")

    'dtLoan = CDate("2019-02-28")
    'dtProcess = CDate ("2020-02-29")


    if LastDateOfMonth(dtLoan) = dtLoan AND dtProcess = LastDateOfMonth(dtProcess) then

        response.write " this mean that the Loan date is end of the month, say 31 Jan, 28, 29 of Feb, 31 Feb "
        response.write " and Process Date is also end of the month " & "<br>" 

        response.write " **** End of the month Loan Date : " & dtLoan & "<br>"
        response.write " **** End of the month Process Date : " & dtProcess & "<br>"

    elseif LastDateOfMonth(dtLoan) <> dtLoan AND dtProcess <> LastDateOfMonth(dtProcess) then

        daysFromEndOfLoanMth = DateDiff("d",LastDateOfMonth(dtLoan),dtLoan)
        response.write " How many days from end of Loan month: " & daysFromEndOfLoanMth & "<br>"

        daysFromEndOfProcessMth = DateAdd("d",daysFromEndOfLoanMth,LastDateOfMonth(dtProcess))
        response.write " From end of the month Add " & daysFromEndOfLoanMth & " Days = " & daysFromEndOfProcessMth & "<br>"
        response.write " The date of process : " & dtProcess & "<br>"

        dtShouldProcess = day(dtLoan) & "/" & Month(dtProcess) & "/" & Year(dtProcess)

        if isDate(dtShouldProcess) then
            dtShouldProcess=CDate(dtShouldProcess)
        else
            dtShouldProcess=daysFromEndOfProcessMth
        end if

        response.write " ** The date of should Process : ** " & dtShouldProcess & "<br>"
        if dtProcess = dtShouldProcess then
        'if dtProcess = daysFromEndOfProcessMth then

            response.write " **** Loan Date : " & dtLoan & "<br>"
            response.write " **** Process Date : " & dtProcess & "<br>"

        end if

    'daysFromEndOfProcessMth =  DateDiff("d",LastDateOfMonth(dtProcess1),dtProcess1)
    'response.write " How many days from Process Date end of the month: " & daysFromEndOfProcessMth & "<br>"

    end if