两个范围之间的差异

Question

我可以找到关于'Union'和'Intersect'VBA方法的大量问题和示例,但我找不到任何关于'Set Difference'方法的内容？这是否存在(除了使用union和intersect的组合之外)？

我试图找到一种简单的方法,让所有range1排除任何range1重叠range2而不知道任何一个范围的大小或形状.

任何帮助将不胜感激.

编辑.

尝试解决方案,其中rng1是红色部分,rng2是蓝色部分(已调试以检查这些是正确的):

rng = SetDifference(rng, highlightedColumns)

Function SetDifference(Rng1 As Range, Rng2 As Range) As Range
On Error Resume Next
If Application.Intersect(Rng1, Rng2).Address <> Rng2.Address Then
    Exit Function
On Error GoTo 0
Dim aCell As Range
For Each aCell In Rng1
    Dim Result As Range
    If Application.Intersect(aCell, Rng2) Is Nothing Then
        Set Result = Union(Result, aCell)
        End If
    Next aCell
Set SetDifference = Result
End If
End Function

Answer 1

在我改进了一下后试试这个功能:

Function SetDifference(Rng1 As Range, Rng2 As Range) As Range
On Error Resume Next

If Intersect(Rng1, Rng2) Is Nothing Then
    'if there is no common area then we will set both areas as result
    Set SetDifference = Union(Rng1, Rng2)
    'alternatively
    'set SetDifference = Nothing
    Exit Function
End If

On Error GoTo 0
Dim aCell As Range
For Each aCell In Rng1
    Dim Result As Range
    If Application.Intersect(aCell, Rng2) Is Nothing Then
        If Result Is Nothing Then
            Set Result = aCell
        Else
            Set Result = Union(Result, aCell)
        End If
    End If
Next aCell
Set SetDifference = Result

End Function

记得像这样称呼它:

Set Rng = SetDifference(Rng, highlightedColumns)

Answer 2

^对于像这样的调用，每个单元格的迭代非常慢

SetDifference(ActiveSheet.Cells, ActiveSheet.Range("A1")) '除 A1 外的所有单元格

所以：

'(needed by the 2nd function)
Public Function Union(ByRef rng1 As Range, _
                      ByRef rng2 As Range) As Range
    If rng1 Is Nothing Then
        Set Union = rng2
        Exit Function
    End If
    If rng2 Is Nothing Then
        Set Union = rng1
        Exit Function
    End If
    If Not rng1.Worksheet Is rng2.Worksheet Then
        Exit Function
    End If
    Set Union = Application.Union(rng1, rng2)
End Function



Public Function Complement(ByRef rngA As Range, _
                           ByRef rngB As Range) As Range
    Dim rngResult As Range
    Dim rngResultCopy As Range
    Dim rngAreaA As Range
    Dim rngAreaB As Range
    Dim lngX1 As Long
    Dim lngY1 As Long
    Dim lngX2 As Long
    Dim lngY2 As Long
    Dim lngX3 As Long
    Dim lngY3 As Long
    Dim lngX4 As Long
    Dim lngY4 As Long
    Dim lngX5 As Long
    Dim lngY5 As Long
    Dim lngX6 As Long
    Dim lngY6 As Long

    If rngA Is Nothing Then
        Exit Function
    End If
    If rngB Is Nothing Then
        Set Complement = rngA
        Exit Function
    End If
    If Not rngA.Worksheet Is rngB.Worksheet Then
        Exit Function
    End If
    Set rngResult = rngA
    With rngA.Worksheet
        For Each rngAreaB In rngB.Areas
            If rngResult Is Nothing Then
                Exit For
            End If
            lngX3 = rngAreaB.Row
            lngY3 = rngAreaB.Column
            lngX4 = lngX3 + rngAreaB.Rows.Count - 1
            lngY4 = lngY3 + rngAreaB.Columns.Count - 1
            Set rngResultCopy = rngResult
            Set rngResult = Nothing
            For Each rngAreaA In rngResultCopy.Areas
                lngX1 = rngAreaA.Row
                lngY1 = rngAreaA.Column
                lngX2 = lngX1 + rngAreaA.Rows.Count - 1
                lngY2 = lngY1 + rngAreaA.Columns.Count - 1
                If lngX3 > lngX1 Then lngX5 = lngX3 Else lngX5 = lngX1
                If lngY3 > lngY1 Then lngY5 = lngY3 Else lngY5 = lngY1
                If lngX4 > lngX2 Then lngX6 = lngX2 Else lngX6 = lngX4
                If lngY4 > lngY2 Then lngY6 = lngY2 Else lngY6 = lngY4
                If lngX5 <= lngX6 And lngY5 <= lngY6 Then
                    If lngX5 > lngX1 Then
                        Set rngResult = Union(rngResult, .Range(.Cells(lngX1, lngY1), .Cells(lngX5 - 1, lngY2)))
                    End If
                    If lngY5 > lngY1 Then
                        Set rngResult = Union(rngResult, .Range(.Cells(lngX5, lngY1), .Cells(lngX6, lngY5 - 1)))
                    End If
                    If lngY2 > lngY6 Then
                        Set rngResult = Union(rngResult, .Range(.Cells(lngX5, lngY6 + 1), .Cells(lngX6, lngY2)))
                    End If
                    If lngX2 > lngX6 Then
                        Set rngResult = Union(rngResult, .Range(.Cells(lngX6 + 1, lngY1), .Cells(lngX2, lngY2)))
                    End If
                Else
                    Set rngResult = Union(rngResult, rngAreaA)
                End If
            Next rngAreaA
        Next rngAreaB
    End With
    Set Complement = rngResult
End Function