范圍內每個單元格的不同顏色

Question

我需要一些幫助，我需要我的宏來為范圍內的每個單元格着色，但每個單元格的顏色必須與上面的單元格不同。 我目前使用的代碼沒有執行這種區分。 代碼是：

Function intRndColor()
    'USE - FUNCTION TO PICK RANDOM COLOR, ALSO ALLOWS EXCLUSION OF COLORS YOU DON'T LIKE
    Dim Again As Label
    Dim RangeX As Range
    Set RangeX = Range(Range("A1"), Range("A1").End(xlDown))

    Again:
        intRndColor = Int((50 * Rnd) + 1) 'GENERATE RANDOM IN

        Select Case intRndColor
            Case Is = 0, 1, 5, 9, 3, 13, 29, 30, 11, 21, 25, 29, 30, 32, 49, 51, 52, 55, 56 'COLORS YOU DON'T WANT
                GoTo Again
            Case Is = pubPrevColor
                GoTo Again
        End Select

        pubPrevColor = intRndColor 'ASSIGN CURRENT COLOR TO PREV COLOR

        ' Range(Range("A1"), Range("A1").End(xlDown)).Interior.ColorIndex = pubPrevColor

        For Each c In RangeX
            c.Interior.ColorIndex = pubPrevColor
        Next c
End Function

這段代碼使整個范圍成為相同的顏色，我不明白我在這里缺少什么......

Answer 1

我認為你的循環混淆了。 循環（使用goto /label 創建）應該在你的循環內，通過范圍內的每個單元格：

Function intRndColor()
    'USE - FUNCTION TO PICK RANDOM COLOR, ALSO ALLOWS EXCLUSION OF COLORS YOU DON'T LIKE

    Dim c as Range
    Dim RangeX As Range
    Set RangeX = Range(Range("A1"), Range("A1").End(xlDown))

    'Loop through each cell in range
    For Each c In RangeX

        'Bounce back to this label if the random color is a color we don't want, or the previous color
        Again:
            intRndColor = Int((50 * Rnd) + 1) 'GENERATE RANDOM COLOR INT
            Select Case intRndColor
                Case Is = 0, 1, 5, 9, 3, 13, 29, 30, 11, 21, 25, 29, 30, 32, 49, 51, 52, 55, 56 'COLORS YOU DON'T WANT
                    GoTo Again
                Case Is = pubPrevColor
                    GoTo Again
            End Select

        'Paint the cell we are on
        c.Interior.ColorIndex = intRndColor

        'Set pubPrevColor
        pubPrevColor = intRndColor
    Next c
End Function

Answer 2

您正確選擇了一種隨機顏色（盡管最大為 51）。 然后，您只需將一種顏色應用於所有單元格。 每次將顏色應用於單元格時，您都需要選擇一種隨機顏色。

如果你想在不使用GoTo等的情況下做到這一點。

Dim RangeX As Range, avoidcolours As String, intRndColor As Long, firstcell As Boolean
avoidcolours = ",0,1,5,9,3,13,29,30,11,21,25,29,30,32,49,51,52,55,56,"

Set RangeX = Range(Range("A1"), Range("A1").End(xlDown))
firstcell = True

'Cycle through cells
For Each c In RangeX.Cells
    If firstcell Then
        'Pick random starting colour
        intRndColor = 0
        Do Until InStr(1, avoidcolours, "," & intRndColor & ",") = 0
            intRndColor = Int((50 * Rnd) + 1)
        Loop
        firstcell = False
    Else
        'Pick random colour
        Do Until intRndColor <> c.Offset(-1, 0).Interior.ColorIndex And InStr(1, avoidcolours, "," & intRndColor & ",") = 0
            intRndColor = Int((55 * Rnd) + 1)
        Loop
    End If
    c.Interior.ColorIndex = intRndColor
Next c

---

一個稍微整潔的方法是創建一個循環來應用隨機顏色和一個函數來生成數字：

Sub applycolours()
    'USE - APPLYS RANDOM COLOURS TO CELLS, DIFFERING FROM CELL ABOVE
    Dim RangeX As Range, intRndColor As Long, firstcell As Boolean

    Set RangeX = Range(Range("A1"), Range("A1").End(xlDown))
    firstcell = True
    'Cycle through cells
    For Each c In RangeX.Cells
        If firstcell Then
            'Pick random starting colour
            intRndColor = randomcolour
            firstcell = False
        Else
            'Pick random colour
            Do Until intRndColor <> c.Offset(-1, 0).Interior.ColorIndex
                intRndColor = randomcolour
            Loop
        End If
        c.Interior.ColorIndex = intRndColor
    Next c
End Sub

Function randomcolour() as long
    'USE - FUNCTION TO PICK RANDOM COLOR, ALSO ALLOWS EXCLUSION OF COLORS YOU DON'T LIKE
    Dim avoidcolours as String
    avoidcolours = ",0,1,5,9,3,13,29,30,11,21,25,29,30,32,49,51,52,55,56,"
    randomcolour = 0
    Do Until InStr(1, avoidcolours, "," & randomcolour & ",") = 0
        randomcolour = Int((55 * Rnd) + 1)
    Loop
End Function