簡單循環遍歷VBA中ActiveCell的行

Question

我正在VBA中編寫一個非常基本的宏，這是我第一次在其中編寫任何內容，因此我很費勁。 我完全知道我需要做的邏輯，只是我還沒有獲得VBA的語法。 如果該行的第一個單元格包含特定的子字符串，我想遍歷該行的每個單元格。 在for循環內，如果該單元格不為空，我想將該子字符串附加到該行中每個單元格的末尾。 我沒有超越我的for循環聲明

Sub changeRow()
Dim txt As String
txt = Cells(ActiveCell.Row, 1)
   If InStr(1, txt, "123") > 0 Then
    For Each b In Range(Rows(ActiveCell.Row).Select)
        If Len(b.Value) > 0 Then
            b.Value = b.Value & " 123"
        End If
    Next b
End If    
End Sub

Answer 1

單程

Sub changeRow()
  Const sTxt        As String = "123"
  Dim cell          As Range

  With Cells(ActiveCell.Row, "A")
    If VarType(.Value) = vbString Then
      If InStr(.Value, sTxt) Then
        For Each cell In .EntireRow.SpecialCells(xlCellTypeConstants, xlTextValues)
          cell.Value = cell.Value & " " & sTxt
        Next cell
      End If
    End If
  End With
End Sub

這還將在其中找到“ 123”的單元格中添加“ 123”，但不將其添加到包含數字或公式的單元格中。

編輯：上面的代碼中有一個禿頭的錯誤。 它應該測試col A中的單元格不包含公式：

Sub changeRow()
  Const sTxt        As String = "123"
  Dim cell          As Range

  With Cells(ActiveCell.Row, "A")
    If VarType(.Value) = vbString And Not .HasFormula Then
      If InStr(.Value, sTxt) Then
        For Each cell In .EntireRow.SpecialCells(xlCellTypeConstants, xlTextValues)
          cell.Value = cell.Value & " " & sTxt
        Next cell
      End If
    End If
  End With
End Sub

否則，SpecialCells行可能會生成運行時錯誤。

Answer 2

這可以實現您想要的，而無需引入任何新變量（盡管我確實將無用的“ b”更改為cell ：

Sub changeRow()
Dim txt As String
Dim cell As Excel.Range

txt = ActiveCell.EntireRow.Cells(1)
If InStr(1, txt, "123") > 0 Then
    For Each cell In Intersect(ActiveCell.EntireRow, ActiveCell.Parent.UsedRange)
        If Len(cell.Value) > 0 Then
            cell.Value = cell.Value & " 123"
        End If
    Next cell
End If
End Sub

它還不會留下任何不合格的變量范圍，這是一個好主意。 通常，您可以通過引入ws類的變量來引用您要處理的工作表來避免這種情況。 但是這段代碼很簡單，並且基於Activecell因此我只使用Activecell.Parent 。

Answer 3

我看到您找到了解決方案。 我只是堅持“您是VBA的新手”這一事實。 如有疑問，請隨時發表評論。 保持大多數原始邏輯，

'-- this line is very important, it keeps "in order" to write code
'-- Forces explicit declaration of all variables in a file, or allows implicit declarations of variables.
'-- please explore on that
Option Explicit

'-- writing this with more comments since you said you are new to VBA
Sub changeRow()
Dim ws As Worksheet
Dim b As Range
Dim activeRange As Range
Dim fullRange As Range
Dim lastColumn As Long
Dim txt As String

    '-- set current sheet into a reference object variable called WS
    Set ws = ActiveWorkbook.Sheets("Sheet1")
    '-- similarly the range you plan to start the validation
    Set activeRange = ws.Range("B2")
    txt = activeRange.Value2

    '-- get last column in the row, 2 refers to rows 2 where you have data
    lastColumn = ws.Cells(2, ws.Columns.Count).End(xlToLeft).Column
    '-- get range until the last column in the row
    Set fullRange = Sheets("Sheet1").Range("B2").Resize(, lastColumn)

    '-- this allows you to view the Address of this range in the Immediate Window, just to make sure you get the desired range right
    Debug.Print fullRange.Address

    If InStr(1, txt, "123") > 0 Then
        '-- iterating through each range in full range that we specified above
        For Each b In fullRange
            '-- there's no need to check this because when InStr() fails,
            '-- the compiler will not come to this validation!
            If Len(b.Value) > 0 Then
                '-- b.Offset(3) refers to 3 rows down from cell B2 which is B5
                '-- output into 5th row for demonstration purpose
                '-- you may set it back to b.Value per your requirement.
                '-- Please explore offset property of Range object
                b.Offset(3).Value = b.Value & " 123"
            End If
        Next b
   End If

   '-- release the memory allocated to these reference object variables
   '-- the order is: first ranges, then worksheet
   Set activeRange = Nothing
   Set fullRange = Nothing
   Set ws = Nothing

End Sub