我有其中要求用户输入Microsoft Access数据库Date Opened:值。 一旦输入，这会触发在另一个领域，计算Deadline (25 WD): 这通过在后场以下功能的工作原理：
=DateAdd("d",25,[Date opened])
我想要做什么，但是，是从输入的日期计25 个工作日内Date Opened: 。 我有一个表holidays其中包含英国假期，直到2020年名单。
我该如何合并两个，所以来讲话，以产生一个有效Deadline (25 WD):值，不计任何上市日期的holidays ？
例如，如果输入的日期为2015年1月1日，则该函数将被计25个工作日内从2015年1月1日，这意味着它会排除所有的周末和秋季该期间内的任何银行假期而产生的日期值在外地Deadline (25 WD)也将成为一个工作日（即不是周末或银行假日）。
您可能需要一个UDF通过这个让你。 就像是，
Function addWorkDays(addNumber As Long, Date2 As Date) As Date
'********************
'Code Courtesy of
' Paul Eugin
'********************
Dim finalDate As Date
Dim i As Long, tmpDate As Date
tmpDate = Date2
i = 1
Do While i <= addNumber
If Weekday(tmpDate) <> 1 And Weekday(tmpDate) <> 7 And _
DCount("*", "tbl_BankHolidays", "bankDate = " & Format(tmpDate, "\#mm\/dd\/yyyy\#")) = 0 Then i = i + 1
tmpDate = DateAdd("d", 1, tmpDate)
Loop
Do While Weekday(tmpDate) = 1 Or Weekday(tmpDate) = 7 Or _
DCount("*", "tbl_BankHolidays", "bankDate = " & Format(tmpDate, "\#mm\/dd\/yyyy\#")) <> 0
tmpDate = DateAdd("d", 1, tmpDate)
Loop
addWorkDays = tmpDate
End Function
所以，当是25天内陆续新增一个日期，它会跳过存储在表中的所有周末和公共假日- tbl_BankHolidays 。
? addWorkDays(25, Date())
25/06/2015
希望这可以帮助 ！
编辑：我已经加入另一个循环，看是否结束日期适逢银行假日和周末，如果是这样，直到它到达一个工作日就会增加一天。
您可以使用此功能：
Public Function DateAddWorkdays( _
ByVal lngNumber As Long, _
ByVal datDate As Date, _
Optional ByVal booWorkOnHolidays As Boolean) _
As Date
' Adds lngNumber of workdays to datDate.
' 2014-10-03. Cactus Data ApS, CPH
' Calendar days per week.
Const clngWeekdayCount As Long = 7
' Workdays per week.
Const clngWeekWorkdays As Long = 5
' Average count of holidays per week maximum.
Const clngWeekHolidays As Long = 1
' Maximum valid date value.
Const cdatDateRangeMax As Date = #12/31/9999#
' Minimum valid date value.
Const cdatDateRangeMin As Date = #1/1/100#
Dim aHolidays() As Date
Dim lngDays As Long
Dim lngDiff As Long
Dim lngDiffMax As Long
Dim lngSign As Long
Dim datDate1 As Date
Dim datDate2 As Date
Dim datLimit As Date
Dim lngHoliday As Long
lngSign = Sgn(lngNumber)
datDate2 = datDate
If lngSign <> 0 Then
If booWorkOnHolidays = True Then
' Holidays are workdays.
Else
' Retrieve array with holidays between datDate and datDate + lngDiffMax.
' Calculate the maximum calendar days per workweek.
lngDiffMax = lngNumber * clngWeekdayCount / (clngWeekWorkdays - clngWeekHolidays)
' Add one week to cover cases where a week contains multiple holidays.
lngDiffMax = lngDiffMax + Sgn(lngDiffMax) * clngWeekdayCount
datDate1 = DateAdd("d", lngDiffMax, datDate)
aHolidays = GetHolidays(datDate, datDate1)
End If
Do Until lngDays = lngNumber
If lngSign = 1 Then
datLimit = cdatDateRangeMax
Else
datLimit = cdatDateRangeMin
End If
If DateDiff("d", DateAdd("d", lngDiff, datDate), datLimit) = 0 Then
' Limit of date range has been reached.
Exit Do
End If
lngDiff = lngDiff + lngSign
datDate2 = DateAdd("d", lngDiff, datDate)
Select Case Weekday(datDate2)
Case vbSaturday, vbSunday
' Skip weekend.
Case Else
' Check for holidays to skip.
' Ignore error when using LBound and UBound on an unassigned array.
On Error Resume Next
For lngHoliday = LBound(aHolidays) To UBound(aHolidays)
If Err.Number > 0 Then
' No holidays between datDate and datDate1.
ElseIf DateDiff("d", datDate2, aHolidays(lngHoliday)) = 0 Then
' This datDate2 hits a holiday.
' Subtract one day before adding one after the loop.
lngDays = lngDays - lngSign
Exit For
End If
Next
On Error GoTo 0
lngDays = lngDays + lngSign
End Select
Loop
End If
DateAddWorkdays = datDate2
End Function
Public Function GetHolidays( _
ByVal datDate1 As Date, _
ByVal datDate2 As Date, _
Optional ByVal booDesc As Boolean) _
As Date()
' Finds the count of holidays between datDate1 and datDate2.
' The holidays are returned as an array of dates.
' DAO objects are declared static to speed up repeated calls with identical date parameters.
' 2014-10-03. Cactus Data ApS, CPH
' The table that holds the holidays.
Const cstrTable As String = "tblHoliday"
' The field of the table that holds the dates of the holidays.
Const cstrField As String = "HolidayDate"
' Constants for the arrays.
Const clngDimRecordCount As Long = 2
Const clngDimFieldOne As Long = 0
Static dbs As DAO.Database
Static rst As DAO.Recordset
Static datDate1Last As Date
Static datDate2Last As Date
Dim adatDays() As Date
Dim avarDays As Variant
Dim strSQL As String
Dim strDate1 As String
Dim strDate2 As String
Dim strOrder As String
Dim lngDays As Long
If DateDiff("d", datDate1, datDate1Last) <> 0 Or DateDiff("d", datDate2, datDate2Last) <> 0 Then
' datDate1 or datDate2 has changed since the last call.
strDate1 = Format(datDate1, "\#yyyy\/mm\/dd\#")
strDate2 = Format(datDate2, "\#yyyy\/mm\/dd\#")
strOrder = Format(booDesc, "\A\s\c;\D\e\s\c")
strSQL = "Select " & cstrField & " From " & cstrTable & " " & _
"Where " & cstrField & " Between " & strDate1 & " And " & strDate2 & " " & _
"Order By 1 " & strOrder
Set dbs = CurrentDb
Set rst = dbs.OpenRecordset(strSQL, dbOpenSnapshot)
' Save the current set of date parameters.
datDate1Last = datDate1
datDate2Last = datDate2
End If
lngDays = rst.RecordCount
If lngDays = 0 Then
' Leave adatDays() as an unassigned array.
Else
ReDim adatDays(lngDays - 1)
' As repeated calls may happen, do a movefirst.
rst.MoveFirst
avarDays = rst.GetRows(lngDays)
' rst is now positioned at the last record.
For lngDays = LBound(avarDays, clngDimRecordCount) To UBound(avarDays, clngDimRecordCount)
adatDays(lngDays) = avarDays(clngDimFieldOne, lngDays)
Next
End If
' DAO objects are static.
' Set rst = Nothing
' Set dbs = Nothing
GetHolidays = adatDays()
End Function
