对于Loop无法在excel VBA中完全循环

问题描述：

我有一个宏，我在其中搜索行中的文本，如果列中没有我指定的文本，则将其删除.这是我的代码:

I have a macro where I search for text in a row and if a column does not have my specified text it is deleted. Here is my code:

Private Sub Test()

Dim lColumn As Long
    lColumn = ActiveSheet.Cells(2, Columns.Count).End(xlToLeft).Column


Dim i As Long
Dim myCell As Range
Dim myRange As Range
Set myRange = Worksheets("2019").Range(Cells(2, 1), Cells(2, lColumn))

For Each myCell In myRange
  If Not myCell Like "*($'000s)*" And Not myCell Like "*Stmt Entry*" And Not myCell Like "*TCF*" And_ 
  Not myCell Like "*Subtotal*" And Not myCell Like "*Hold*" Then
    myCell.EntireColumn.Select
    Selection.Delete
  End If

Next

End Sub

我的问题是，当我执行宏时，它只会删除某些列，而不会删除范围末尾的那些列.如果我再次运行宏，它将成功删除我要求它的所有列.

My issue is that when I execute the macro it will only delete some of the columns but not the ones towards the end of the range. If I then run the macro again it will successfully delete all the columns I ask it to.

如果我将宏切换为-假设-使单元格变为粗体而不是删除它们，则每次运行都非常完美.

If I switch the macro to- let's say- make the cells bold instead of deleting them it works perfectly every time.

我想念什么?

非常感谢！

答

尽管每个人在此&链接的帖子，那不是您想要的.

Despite everyone saying "just loop backwards" in this & linked posts, that's not what you want to do.

它将起作用，然后您的下一个问题是我如何加快循环速度".

It's going to work, and then your next question will be "how can I speed up this loop".

真正的解决方案是停止正在做的事情，并以不同的方式做事.在迭代时修改集合从来都不是一个好主意.

The real solution is to stop what you're doing, and do things differently. Modifying a collection as you're iterating it is never a good idea.

从一个可以将两个范围合并为一个范围的助手功能开始:

Start with a helper function that can combine two ranges into one:

Private Function CombineRanges(ByVal source As Range, ByVal toCombine As Range) As Range
    If source Is Nothing Then
        'note: returns Nothing if toCombine is Nothing
        Set CombineRanges = toCombine
    Else
        Set CombineRanges = Union(source, toCombine)
    End If
End Function

然后声明一个toDelete范围，并在进行迭代时使用此CombineRanges函数 build (选择")一个Range-请注意，此循环不会修改任何单元格任何地方:

Then declare a toDelete range and use this CombineRanges function to build ("select") a Range while you're iterating - note that this loop does not modify any cells anywhere:

Dim sheet As Worksheet
' todo: use sheet's codename instead if '2019' is in ThisWorkbook
Set sheet = ActiveWorkbook.Worksheets("2019")

Dim source As Range
' note: qualified .Cells member calls refer to same sheet as .Range call
Set source = sheet.Range(sheet.Cells(2, 1), sheet.Cells(2, lColumn))

Dim toDelete As Range
Dim cell As Range
For Each cell In source
    'note: needed because comparing cell.Value with anything will throw error 13 "type mismatch" if cell contains a worksheet error value.
    'alternatively, use cell.Text.
    If Not IsError(cell.Value) Then
        If Not cell.Value Like "*($'000s)*" _
            And Not cell.Value Like "*Stmt Entry*" _
            And Not cell.Value Like "*TCF*" _
            And Not cell.Value Like "*Subtotal*" _
            And Not cell.Value Like "*Hold*" _
        Then
            Set toDelete = CombineRanges(cell, toDelete)
        End If
    End If
Next

最后的最后一步是删除toDelete范围内的.EntireColumn ...如果那时还不是Nothing:

The last, final step is to delete the .EntireColumn of the toDelete range... if it isn't Nothing at that point:

If Not toDelete Is Nothing Then toDelete.EntireColumn.Delete

对于Loop无法在excel VBA中完全循环

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