我编写了以下过程，将5个工作簿中的信息导入，复制并粘贴到我的主工作簿的指定工作表中。将导入的文件复制并粘贴到正确的工作表上非常重要，否则，我的整个项目的计算都会失败。
编写该过程，以便在指定路径中找不到要导入的文件时，将打开“打开文件”对话框，用户可以浏览该文件。找到文件后，该过程会将该文件导入主工作簿。
一切正常，但是我知道如果文件丢失并且用户检查目录中的文件名，它将引入该文件并将其粘贴到工作簿上。这是一个问题，我不知道如何防止或警告用户导入错误的文件。
换句话说，我的循环开始为For n As Long = 1 to 5 Step 1如果缺少的文件是n=3 or statusReport.xls并且打开了“打开文件”对话框，则用户可以选择该目录上的任何文件或任何其他文件并粘贴在该目录上指定表。我想要的是警告用户它已选择不等于n=3 or statusReport.xls
以下是要导入的5个工作表和要粘贴的工作表的功能：
Public Function DataSheets(Index As Long) As Excel.Worksheet
'This function indexes both the data employee and position
'export sheets from Payscale.
'@param DataSheets, are the sheets to index
Select Case Index
Case 1 : Return xlWSEmployee
Case 2 : Return xlWSPosition
Case 3 : Return xlWSStatusReport
Case 4 : Return xlWSByDepartment
Case 5 : Return xlWSByBand
End Select
Throw New ArgumentOutOfRangeException("Index")
End Function
Public Function GetImportFiles(Index As Long) As String
'This function houses the 5 files
'used to import data to the project
'@param GetImportFiles, are the files to be
'imported and pasted on the DataSheets
Select Case Index
Case 1 : Return "byEmployee.csv"
Case 2 : Return "byPosition.csv"
Case 3 : Return "statusReport.xls"
Case 4 : Return "byDepartment.csv"
Case 5 : Return "byband.csv"
End Select
Throw New ArgumentOutOfRangeException("Index")
End Function
这是导入，复制和粘贴文件的过程。对于我自己的理智和那些试图找出正在发生的事情的人来说，它的评论很多。我还在下面注意到我需要插入检查以确保所选文件等于n
'This procedure imports the Client Listing.xlsx sheet. The procedure checks if the file is
'in the same directory as the template. If the file is not there, a browser window appears to allow the user
'to browse for the missing file. A series of message boxes guide the user through the process and
'verifies that the user picked the right file. The user can cancel the import at any time.
'Worksheet and Workbook Variables
Dim xlDestSheet As Excel.Worksheet
Dim xlWBPath As String = Globals.ThisWorkbook.Application.ActiveWorkbook.Path
Dim strImportFile As String
Dim xlWBSource As Object = Nothing
Dim xlWBImport As Object = Nothing
'Loop through the 5 sheets and files
For n As Long = 1 To 5 Step 1
strImportFile = xlWBPath & "\" & GetImportFiles(n)
xlDestSheet = DataSheets(n)
'Convert the indexed sheet name to a string
'so that it can be passed through the xlWB.Worksheets paramater
Dim strDestSheetName As String = xlDestSheet.Name
'If the file is found, then import, copy and paste the
'data into the corresponding sheets
If Len(Dir(strImportFile)) > 0 Then
xlWBSource = Globals.ThisWorkbook.Application.ActiveWorkbook
xlWBImport = Globals.ThisWorkbook.Application.Workbooks.Open(strImportFile)
xlWBImport.Worksheets(1).Cells.Copy(xlWB.Worksheets(strDestSheetName).Range("A1"))
xlWBImport.Close()
Else
'If a sheet is missing, prompt the user if they
'want to browse for the file.
'Messagbox variables
Dim msbProceed As MsgBoxResult
Dim strVmbProceedResults As String = ("Procedure Canceled. Your project will now close")
Dim strPrompt As String = " source file does not exist." & vbNewLine & _
"Press OK to browse for the file or Cancel to quit"
'If the user does not want to browse, then close the workbook, no changes saved.
msbProceed = MsgBox("The " & strImportFile & strPrompt, MsgBoxStyle.OkCancel + MsgBoxStyle.Question, "Verify Source File")
If msbProceed = MsgBoxResult.Cancel Then
msbProceed = MsgBox(strVmbProceedResults, MsgBoxStyle.OkOnly + MsgBoxStyle.Critical)
xlWB.Close(SaveChanges:=False)
Exit Sub
Else
'If the user does want to browse, then open the File Dialog
'box for the user to browse for the file
'Open Fil Dialog box variable and settings
Dim ofdGetOpenFileName As New OpenFileDialog()
ofdGetOpenFileName.Title = "Open File " & strImportFile
ofdGetOpenFileName.InitialDirectory = xlWBPath
ofdGetOpenFileName.Filter = "Excel Files (*.xls;*.xlsx; *.xlsm; *.csv)| *.xls; *.csv; *.xlsx; *.xlsm"
ofdGetOpenFileName.FilterIndex = 2
ofdGetOpenFileName.RestoreDirectory = True
'If the user presses Cancel on the box, warn that no
'file has been selected and the workbook will close
If ofdGetOpenFileName.ShowDialog() = System.Windows.Forms.DialogResult.Cancel Then
'Message box variables
Dim msbContinue As MsgBoxResult
Dim strAlert As String = ("You have not selected a workbook." & vbNewLine & _
"The project will now close without saving changes")
'Once the user presses OK, close the file and do not save changes
msbContinue = MsgBox(strAlert, MsgBoxStyle.OkOnly + MsgBoxStyle.Critical, "No Workbook Seletected")
xlWB.Close(SaveChanges:=False)
Exit Sub
Else
'If the user does select the file, then import the file
'copy and paste on workbook.
'***Here is where I need to check that strImportFile =n, if it does not warn the user******
strImportFile = ofdGetOpenFileName.FileName
xlWBImport = Globals.ThisWorkbook.Application.Workbooks.Open(strImportFile)
xlWBImport.Worksheets(1).Cells.Copy(xlWB.Worksheets(strDestSheetName).Range("A1"))
xlWBImport.Close()
End If
Try
'Import the remainder of the files
xlWBSource = Globals.ThisWorkbook.Application.ActiveWorkbook
xlWBImport = Globals.ThisWorkbook.Application.Workbooks.Open(strImportFile)
xlWBImport.Worksheets(1).Cells.Copy(xlWB.Worksheets(strDestSheetName).Range("A1"))
xlWBImport.Close()
Catch ex As Exception
MsgBox(Err.Description, MsgBoxStyle.Critical, "Unexpected Error")
End Try
End If
End If
Next
End Sub
我们将不胜感激任何帮助和/或任何改进我的代码的建议。
谢谢。答案 0 :(得分：1)
这看起来像GoTo的一个可能的应用程序 - 被许多人反对，但它仍然有它的用途!!
将文件名与if语句进行比较，如果不正确，则通知用户并将其返回到浏览对话框。
Else
Retry:
'If the user does want to browse, then open the File Dialog
'box for the user to browse for the file
'Open Fil Dialog box variable and settings
Dim ofdGetOpenFileName As New OpenFileDialog()
ofdGetOpenFileName.Title = "Open File " & strImportFile
ofdGetOpenFileName.InitialDirectory = xlWBPath
ofdGetOpenFileName.Filter = "Excel Files (*.xls;*.xlsx; *.xlsm; *.csv)| *.xls; *.csv; *.xlsx; *.xlsm"
ofdGetOpenFileName.FilterIndex = 2
ofdGetOpenFileName.RestoreDirectory = True
'If the user presses Cancel on the box, warn that no
'file has been selected and the workbook will close
If ofdGetOpenFileName.ShowDialog() = System.Windows.Forms.DialogResult.Cancel Then
'Message box variables
Dim msbContinue As MsgBoxResult
Dim strAlert As String = ("You have not selected a workbook." & vbNewLine & _
"The project will now close without saving changes")
'Once the user presses OK, close the file and do not save changes
msbContinue = MsgBox(strAlert, MsgBoxStyle.OkOnly + MsgBoxStyle.Critical, "No Workbook Seletected")
xlWB.Close(SaveChanges:=False)
Exit Sub
Else
'If the user does select the file, then import the file
'copy and paste on workbook.
'***Here is where I need to check that strImportFile =n, if it does not warn the user******
strImportFile = ofdGetOpenFileName.FileName
If strImportFile <> GetImportFiles(n) then
msgbox("You have not selected the correct file please try again")
GoTo Retry
End If
xlWBImport = Globals.ThisWorkbook.Application.Workbooks.Open(strImportFile)
xlWBImport.Worksheets(1).Cells.Copy(xlWB.Worksheets(strDestSheetName).Range("A1"))
xlWBImport.Close()
End If
希望这会有所帮助......
还应该添加到这个中，建议将GoTo作为查询的结果放到用户，否则如果他们无法找到正确的文件，他们会发现自己处于无限循环中！