非相交范围 VBA

Question

在下面的代码中rngIntersect.Address 返回A10。有没有什么方法可以在不循环的情况下获得除交集之外的所有范围？

Sub NotIntersect()

    Dim rng As Range, rngVal As Range, rngIntersect As Range
    Set rng = Range("A1:A10")
    Set rngVal = Range("A10")

    Set rngIntersect = Intersect(rng, rngVal)
    MsgBox rngIntersect.Address

End Sub

Answer 1

您正在寻找的是集合论术语中的“补语”。见Wikipedia。 可以在不遍历两个范围内的每个单元格的情况下完成（这对于具有许多单元格的范围来说将是一个巨大的开销），但是您需要遍历范围内的每个区域。该循环快速有效。代码如下：

Public Function NotIntersect(Range1 As Range, Range2 As Range) As Range
Dim NewRange As Range, CurrentArea As Range, CurrentNewArea(1 To 4) As Range, r As Range
Dim c%, a%
Dim TopLeftCell(1 To 2) As Range, BottomRightCell(1 To 2) As Range
Dim NewRanges() As Range, ColNewRanges() As New Collection
Const N% = 2
Const U% = 1

If Range1 Is Nothing And Range2 Is Nothing Then
    Set NotIntersect = Nothing
ElseIf Range1.Address = Range2.Address Then
    Set NotIntersect = Nothing
ElseIf Range1 Is Nothing Then
    Set NotIntersect = Range2
ElseIf Range1 Is Nothing Then
    Set NotIntersect = Range1
Else

    Set TopLeftCell(U) = Range1.Cells(1, 1)
    Set BottomRightCell(U) = Range1.Cells(Range1.Rows.Count, Range1.Columns.Count)

    c = Range2.Areas.Count
    ReDim ColNewRanges(1 To c)
    ReDim NewRanges(1 To c)

    For a = 1 To c
        Set CurrentArea = Range2.Areas(a)
        Set TopLeftCell(N) = CurrentArea.Cells(1, 1)
        Set BottomRightCell(N) = CurrentArea.Cells(CurrentArea.Rows.Count, CurrentArea.Columns.Count)

        On Error Resume Next
        Set ColNewRanges(a) = New Collection
        ColNewRanges(a).Add Range(TopLeftCell(U), Cells(TopLeftCell(N).Row - 1, BottomRightCell(U).Column))
        ColNewRanges(a).Add Range(Cells(TopLeftCell(N).Row, TopLeftCell(U).Column), Cells(BottomRightCell(N).Row, TopLeftCell(N).Column - 1))
        ColNewRanges(a).Add Range(Cells(TopLeftCell(N).Row, BottomRightCell(N).Column + 1), Cells(BottomRightCell(N).Row, BottomRightCell(U).Column))
        ColNewRanges(a).Add Range(Cells(BottomRightCell(N).Row + 1, TopLeftCell(U).Column), BottomRightCell(U))
        On Error GoTo 0

        For Each r In ColNewRanges(a)
            If NewRanges(a) Is Nothing Then
                Set NewRanges(a) = r
            Else
                Set NewRanges(a) = Union(NewRanges(a), r)
            End If
        Next r

    Next a

    For a = 1 To c
        If NewRange Is Nothing Then
            Set NewRange = NewRanges(a)
        Else
            Set NewRange = Intersect(NewRange, NewRanges(a))
        End If
    Next a

    Set NotIntersect = Intersect(Range1, NewRange) 'intersect required in case it's on the bottom or right line, so a part of range will go beyond the line...

End If    
End Function

测试如下：

Sub Test1()
    NotIntersect(Range("$A$1:$N$24"), Range("$G$3:$H$12,$C$4:$D$7,$A$13:$A$15")).Select
End Sub

Answer 2

我已将此问题发布到 msdn 论坛，但没有得到 SO 的回复，并得到了所需的解决方案。我已经测试了代码，它工作正常。希望对你有帮助。

这里是 link 在 msdn 上发帖。

Sub NotIntersect()
        Dim rng As Range, rngVal As Range, rngDiff As Range
        Set rng = Range("A1:A10")
        Set rngVal = Range("A5")
        Set rngDiff = Difference(rng, rngVal)
        MsgBox rngDiff.Address
    End Sub
    
    Function Difference(Range1 As Range, Range2 As Range) As Range
        Dim rngUnion As Range
        Dim rngIntersect As Range
        Dim varFormulas As Variant
        If Range1 Is Nothing Then
            Set Difference = Range2
        ElseIf Range2 Is Nothing Then
            Set Difference = Range1
        ElseIf Range1 Is Nothing And Range2 Is Nothing Then
            Set Difference = Nothing
        Else
            Set rngUnion = Union(Range1, Range2)
            Set rngIntersect = Intersect(Range1, Range2)
            If rngIntersect Is Nothing Then
                Set Difference = rngUnion 'Updated "Different" to "Difference"
            Else
                varFormulas = rngUnion.Formula
                rngUnion.Value = 0
                rngIntersect.ClearContents
                Set Difference = rngUnion.SpecialCells(xlCellTypeConstants)
                rngUnion.Formula = varFormulas
            End If
        End If
    End Function

Answer 3

据我所知，没有“干净”的功能。如果要求“无循环”很重要，您可以尝试以下方法（这是一种“方法”，而不是工作代码）：

- create a new sheet
- find intersection of ranges
- set range from top left to bottom right of intersection to 0
- set range1 to 1
- set all values in range2 = XOR of values that are there (so 1 becomes 0, and 0 becomes 1)
- find all cells with a 1 - their address is the "non-intersection"
- delete the temp sheet

我相信这些都可以在没有循环的情况下完成 - 但这是一个可怕的 hack...