vba - VBA 错误：对象变量或未设置变量

Question

在 VBA 中运行此子例程时收到一个奇怪的错误：

Sub NameColumns()
' name key columns for later reference in formulas
Dim startdatecol As Integer

' name start date column
startdatecol = ActiveSheet.Cells.Find(What:="Start Date", after:=[a1], LookIn:=xlValues, _
LookAt:=xlPart, SearchOrder:=xlByColumns, SearchDirection:=xlNext, _
MatchCase:=False, SearchFormat:=False).Column
End Sub

运行时错误“91”：对象变量或未设置变量

关于如何修复此子程序错误的任何想法？为什么会发生？

谢谢， AME

Answer 1

问题是Find没有找到单元格。

您会发现（双关语）以下情况属实：

MsgBox ActiveSheet.Cells.Find(What:="Start Date", after:=[a1], LookIn:=xlValues, _
LookAt:=xlPart, SearchOrder:=xlByColumns, SearchDirection:=xlNext, _
MatchCase:=False, SearchFormat:=False) Is Nothing

您应该做的第一件事是修复您的搜索，以便它找到您正在寻找的单元格。

编辑：

也许可以更好地说明问题的更改是：

Dim found as Range
Dim startDateCol as Integer

Set found = ActiveSheet.Cells.Find(What:="Start Date", after:=[a1], LookIn:=xlValues, _
LookAt:=xlPart, SearchOrder:=xlByColumns, SearchDirection:=xlNext, _
MatchCase:=False, SearchFormat:=False)

If Not found Is Nothing Then startDateCol = found.Column

MsgBox startDateCol 'This will be zero if the "Start Date" cell wasn't found.

编辑以回应评论：

'This should find the exact text "Start Date" (case sensitive) in the header row.
'A cell containing, for example "The Start Date" will not be matched.
Set found = ActiveSheet.Range("1:1").Find("Start Date", LookIn:=xlValues, _
                                           LookAt:=xlWhole, MatchCase:=True)