如何使For-Each循环向后运行

I have written a small script in VBA which checks the value of a cell in a given range against a list. If the cell values match a value in the list it is kept, else it is deleted. I was wondering how I could make it run backward, as running it forwards creates issues. I have researched this somewhat and I have tried appending 'Step -1' to the end of the line which begins the for loop, but this doesn't work in this case.

我在VBA中编写了一个小脚本，它根据列表检查给定范围内的单元格的值。如果单元格值与列表中的值匹配则保留，否则将删除。我想知道如何让它向后运行，因为向前运行会产生问题。我已经对此进行了一些研究，并且我尝试将“Step -1”附加到开始for循环的行的末尾，但是在这种情况下这不起作用。

Set Rng = Range("A9:V9")
For Each cell In Rng
    If Not myList.Exists(cell.Value) Then
        cell.EntireColumn.Delete
    End If
Next

2 个解决方案

#1

In this case, probably some for-loop like this one would be enough:

在这种情况下，可能像这样的一些for循环就足够了：

Option Explicit

Sub TestMe()

    Dim rng As Range
    Dim cnt As Long

    Set rng = Range("A9:V9")

    For cnt = rng.Cells.Count To 1 Step -1
        Cells(rng.Row, cnt) = 23
        Stop
    Next

End Sub

I have put Stop so you can see which cell is referred. Once you hit the Stop, continue further with F5.

我已经把Stop设置为可以看到哪个单元格被引用。一旦你点击停止，继续使用F5。

#2

Richard, you're entirely right that the "Step -1" approach would be the right solution in this case. You simply have to change the variable references around to work with the loop.

理查德，你完全正确，在这种情况下，“Step -1”方法将是正确的解决方案。您只需更改变量引用即可使用循环。

For example:

例如：

Set Rng = Range("A9:V9")
For i = rng.rows.count to 1 step -1
    for j = rng.columns.count to 1 step -1
        if not myList.Exists(rng.cells(i, j).value) then
           rng.cells(i, j).entirecolumn.delete ' This probably won't work, but you get the idea.
        end if
    next j
next i

#1