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我编写了以下代码来查找五个日期中最早的日期。它按预期工作,但我很好奇是否有更优雅的方式来比较五个日期。有没有人有任何想法?

Dim sTemp
sTemp = ""

If IsDate(dtOne) Then
    If IsDate(dtTwo) Then
        If CDate(dtOne) < CDate(dtTwo) Then
            sTemp = dtOne
        Else
            sTemp = dtTwo
        End If
    Else
        sTemp = dtOne
    End If
ElseIf IsDate(dtTwo) Then
    sTemp = dtTwo
End If

If IsDate(dtThree) Then
    If IsDate(sTemp) Then
        If CDate(dtThree) < CDate(sTemp) Then
            sTemp = dtThree
        End If
    Else
        sTemp = dtThree
    End If
End If

If IsDate(dtFour) Then
    If IsDate(sTemp) Then
        If CDate(dtFour) < CDate(sTemp) Then
            sTemp = dtFour
        End If
    Else
        sTemp = dtFour
    End If
End If

If IsDate(dtFive) Then
    If IsDate(sTemp) Then
        If CDate(dtFive) < CDate(sTemp) Then
            sTemp = dtFive
        End If
    Else
        sTemp = dtFive
    End If
End If
4

3 回答 3

1

像这样的事情怎么样,它会进行每次比较,如果传递的变量都不是日期,它将 sTemp 恢复为“”:

Dim sTemp
sTemp = ""
sTemp = OldestDate(dtOne, dtTwo)
sTemp = OldestDate(dtThree, sTemp)
sTemp = OldestDate(dtfour, sTemp)
sTemp = OldestDate(dtfive, sTemp)

Function OldestDate(dtOne, dtTwo)
    If IsDate(dtOne) Then
        If IsDate(dtTwo) Then
            If CDate(dtOne) < CDate(dtTwo) Then
                OldestDate = dtOne
            Else
                OldestDate = dtTwo
            End If
        Else
            OldestDate = dtOne
        End If
    ElseIf IsDate(dtTwo) Then
        OldestDate = dtTwo
    Else
         OldestDate = ""
    End If
End Function
于 2012-10-26T23:41:53.873 回答
0

我会使用这样的东西:

sTemp = GetOldestOf(sTemp, dtOne)   ' this instruction makes "dtOne" the current
                                    ' current oldest date, b/c "sTemp" is auto-
                                    ' initialized as Empty
sTemp = GetOldestOf(sTemp, dtTwo)
sTemp = GetOldestOf(sTemp, dtThree)
sTemp = GetOldestOf(sTemp, dtFour)
sTemp = GetOldestOf(sTemp, dtFive)

If isEmpty(sTemp) Then
  WScript.Echo "No valid date found!"
Else
  WScript.Echo "Oldest date is: " & sTemp
End If

' pre-condition: d1 is either Empty or the current oldest date
Function GetOldestOf(ByVal d1, ByVal d2)
  GetOldestOf = d1          ' make d1 the default return value
  If IsDate(d2) Then        ' d2 is a valid date
    d2 = CDate(d2)
    If IsEmpty(d1) Then     ' if d1 is empty, d2 is automatically oldest
      GetOldestOf = d2
    ElseIf d1 > d2 Then     ' otherwise check if d2 is older
      GetOldestOf = d2
    End If
  End If
End Function

GetOldestOf()如果参数是有效日期并且第一个参数是Empty或比第二个参数更新,则返回第二个参数(转换为日期)。否则,该函数返回(未修改的)第一个参数,根据定义,该参数是Empty当前最旧日期或最旧日期。

于 2012-10-27T12:21:36.083 回答
0

您要求一种优雅的方法,然后使用 ArrayList,对其进行填充和排序。在概念验证代码下方,它不处理异常,例如没有一个日期是有效的:

' Create a new arraylist
Set arrayList = createobject("System.Collections.ArrayList")

' Loop through all dates
For each d in array("23-5-2007", "28-6-2010", "16-9-2001", "32-12-2000")
     ' See if the date is valid. If true, convert it to a date and add it to the list
    If isDate(d) Then arrayList.Add cDate(d)
Next

' Sort the list from oldest to newest date
arrayList.Sort

' Get the first item, it will be the oldest date (16-9-2001)
OldestDate = arrayList.Item(0)
于 2012-10-29T15:33:58.037 回答