Merging workbooks into a new file - excel

Question

I'm trying to merge multiple Excel files from one Folder into a new file. I've found a solution on the Internet, that is adding my files into an open one. I'm not really into VBA Excel, so I think it's a basic problem, but I can't do it, things I've tried haven't worked properly. I would like to change the following code to create a new file called "summary" in the "Path" and copy the Sheets into this new file, overwriting the file every time I do it and deleting the several source files after doing this.
Is there a possibility of merging all those files into one without opening everyone of it?
Sub GetSheets()
Path = "C:\Merging\"
FileName = Dir(Path & "*.xls")
Do While FileName <> ""
Workbooks.Open FileName:=Path & FileName, ReadOnly:=True
For Each Sheet In ActiveWorkbook.Sheets
Sheet.Copy After:=ThisWorkbook.Sheets(1)
Next Sheet
Workbooks(FileName).Close
FileName = Dir()
Loop
End Sub

Answer 1

Your code almost works as is, just needs a couple of slight tweaks. I also agree with #AnalystCave that if this is a repeating exercise, you may consider a more streamlined solution. But this will work for you.
EDIT: changed to deal with existing destination file -- if it exists and is open, then connect to it otherwise open it; then delete all sheets in the existing file to prepare for the copies
Option Explicit
Function IsSheetEmpty(sht As Worksheet) As Boolean
IsSheetEmpty = Application.WorksheetFunction.CountA(sht.Cells) = 0
End Function
Sub GetSheets()
Dim Path, Filename As String
Dim Sheet As Worksheet
Dim newBook As Workbook
Dim appSheets As Integer
Dim srcFile As String
Dim dstFile As String
Dim dstPath As String
Dim wasntAlreadyOpen As Boolean
Application.ScreenUpdating = False 'go faster by not waiting for display
'--- create a new workbook with only one worksheet
dstFile = "AllSheetsHere.xlsx"
dstPath = ActiveWorkbook.Path & "\" & dstFile
wasntAlreadyOpen = True
If Dir(dstPath) = "" Then
'--- the destination workbook does not (yet) exist, so create it
appSheets = Application.SheetsInNewWorkbook 'saves the default number of new sheets
Application.SheetsInNewWorkbook = 1 'force only one new sheet
Set newBook = Application.Workbooks.Add
newBook.SaveAs dstFile
Application.SheetsInNewWorkbook = appSheets 'restores the default number of new sheets
Else
'--- the destination workbook exists, so ...
On Error Resume Next
wasntAlreadyOpen = False
Set newBook = Workbooks(dstFile) 'connect if already open
If newBook Is Nothing Then
Set newBook = Workbooks.Open(dstPath) 'open if needed
wasntAlreadyOpen = True
End If
On Error GoTo 0
'--- make sure to delete any/all worksheets so we're only left
' with a single empty sheet named "Sheet1"
Application.DisplayAlerts = False 'we dont need to see the warning message
Do While newBook.Sheets.Count > 1
newBook.Sheets(newBook.Sheets.Count).Delete
Loop
newBook.Sheets(1).Name = "Sheet1"
newBook.Sheets(1).Cells.ClearContents
newBook.Sheets(1).Cells.ClearFormats
Application.DisplayAlerts = True 'turn alerts back on
End If
Path = "C:\Temp\"
Filename = Dir(Path & "*.xls?") 'add the ? to pick up *.xlsx and *.xlsm files
Do While Filename <> ""
srcFile = Path & Filename
Workbooks.Open Filename:=srcFile, ReadOnly:=True
For Each Sheet In ActiveWorkbook.Sheets
'--- potentially check for blank sheets, or only sheets
' with specific data on them
If Not IsSheetEmpty(Sheet) Then
Sheet.Copy After:=newBook.Sheets(1)
End If
Next Sheet
Workbooks(Filename).Close (False) 'add False to close without saving
Kill srcFile 'deletes the file
Filename = Dir()
Loop
'--- delete the original empty worksheet and save the book
If newBook.Sheets.Count > 1 Then
newBook.Sheets(1).Delete
End If
newBook.Save
'--- leave it open if it was already open when we started
If wasntAlreadyOpen Then
newBook.Close
End If
Application.ScreenUpdating = True 're-enable screen updates
End Sub

Answer 2

Firstly, regardless of your solution you will still need to OPEN every Excel workbook if you want to merge all of them.
Secondly, I think you might want to rephrase your question to "Is there a possibility of merging all those files into one faster or in any easier way?"
From the level of Excel VBA there is really no other way then opening each Workbook within the same Application level. If this is a one-time exercise I would stick to the code you already have and bear with it.
However, if this is an exercise you will be doing repeatedly and need an efficient solution, your only option is resorting to the OpenXML format which does not require a heavyweight Excel process e.g. creating a C# solution using the ClosedXML library. This will definitely reduce the time needed to consolidate your workbooks.