How do I copy a range from one workbook to another in excel WITHOUT having to name it in VBA? - vba

Question

I'm looking for assistance regarding how to write a VBA command that allows me to copy a range of cells from different workbooks onto one master sheet. Let me explain further.
Everyday I receive a new excel document from my clients named based on the date it was uploaded ie. September 18, 2018 file would be called A20180918.
Once i've received a week's worth of excel files (A20180918-A20180921), I then have to copy certain information from the original uploaded file to a master tracking sheet.
So, my hurdle is such that each time I record my actions into a macro, the code includes the file name which then creates a subscript error when it's run on the next day's file.
So here's an example below of the code I have this far:
Sub CopyRange()
CopyRange Macro
'This is the line of the code that's causing problems given it's a specified workbook name
'and when I try to open tomorrow's workbook i'll run into the subscript error.
Windows("A20180914.xls").Activate
Range("A2:B2").Select
Range(Selection, Selection.End(xlDown)).Select
Selection.Copy
Windows("Master Sheet.xlsm").Activate
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
End Sub
Thank you!

Answer 1

Here's two solutions. One to scan an Directory for files, and the other to select files. I see they've both been suggested in the comments already. :p
Sub Test()
' If you want to scan an "unprocessed files" directory
'Call ScanDir("C:\Test\")
' If you want to select files to process
Call SelectFiles
End Sub
Private Sub ScanDir(ByVal DirPath As String)
Dim oCurFile As String
oCurFile = Dir(DirPath)
Do While oCurFile <> ""
' Add the work to the file here
' Filename: DirPath & oCurFile
oCurFile = Dir()
Loop
End Sub
Private Sub SelectFiles()
Dim oFileDialog As FileDialog
Set oFileDialog = Application.FileDialog(msoFileDialogFilePicker)
oFileDialog.AllowMultiSelect = True
If oFileDialog.Show = -1 Then
Dim oFile As Variant
For Each oFile In oFileDialog.SelectedItems
' Add the work to the file here
' Filename: oFile
Next
End If
End Sub

Answer 2

By the looks of it you have all the workbooks open when you run the code - there are ways to have the code open each workbook in a certain folder, or ask the user to select them.
While writing this other answers have given the code for selecting files from folders.
Each workbook in the Excel Application is held in a collection of workbooks. The good thing about collections is you can step through them without know the specifics before you get there.
The code below will print the name of each workbook you have open into the immediate window. Note - these are in the same instance of Excel. If you open Excel a second time then any workbooks in that application will be in a different collection.
You don't really need the Application but I left it in to make things a bit clearer.
Sub Test()
Dim bk As Workbook
For Each bk In Application.Workbooks
Debug.Print bk.Name
Next bk
End Sub
This is the full code - note that nothing is Selected.
Sub Test()
Dim bk As Workbook
Dim Master As Workbook
Dim LastCell As Range
Set Master = Workbooks("Master Sheet.xlsm")
For Each bk In Application.Workbooks
'Checks the middle part of the file name - should be a number.
'Better ways to check the file name are available.
If IsNumeric(Mid(bk.Name, 3, 8)) Then
'Copy date from Sheet1. It's assumed each row in
'column B is populated and figures out the last cell from there.
With bk.Worksheets("Sheet1")
Set LastCell = .Cells(.Rows.Count, 2).End(xlUp)
.Range("A1", LastCell).Copy
End With
'Pastes the results to Sheet1 in the Master workbook.
'The last cell containing data in column A is found and
'then offset by 1 row.
With Master.Worksheets("Sheet1")
.Range("A" & .Rows.Count).End(xlUp).Offset(1).PasteSpecial Paste:=xlPasteValues
End With
End If
Next bk
End Sub

Answer 3

This will do it, you just need to supply the sheet name and ranges where noted:
Sub copyRange()
'File system variables
Dim objFSO As Object
Dim objFolder As Object
Dim objFile As Object
Dim myDir As String
Dim Mask As String
'Workbook variables
Dim wb As Workbook
Dim sh As Worksheet
myDir = "C:\Users\Guest\Desktop" 'Insert the path where your incoming files are stored.
Mask = "*.xl??" 'This makes it so it only looks at Excel files.
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFolder = objFSO.getFolder(myDir)
For Each objFile In objFolder.Files
If LCase(objFile.Name) Like LCase(Mask) Then
Set wb = Workbooks.Open(myDir & "\" & objFile.Name, , True) 'This is set to open in read only, to avoid issues with the file already being open
'The ranges you are copying/pasting are vague, supply the sheet names and ranges below
'Get Copy range with dynamic number of rows.
With wb.Sheets("Sheet1").Range("A2:B2") '<---- Specify Sheet/Range
Set copyRange = .Resize(.End(xlDown).Row, 2)
End With
'Get next available row in paste range.
With ThisWorkbook.Sheets("Sheet1").Range("G:H") '<---- Specify Sheet/Range
Set pasteRange = .Cells(.Rows.Count, 1).End(xlUp).Offset(1, 0)
End With
copyRange.Copy pasteRange
wb.Close False
End If
Next objFile
End Sub