Fill in the entire column according to the last data in the table - Does not work - excel

Question

I have a formula in Column A2.
I have a table similar to this:
Formula
Note
Datum
I am very happy because I am
Years
years old
=CONCATENATE(TEXT(C2;"dd-mm-yyyy");$D$1;E2;$F$1)
Any word, TEXT
01.04.2021
21
Autofill
Any word, TEXT 2
01.04.2021
25
I want to transfer it and use it automatically for the whole column. However, I tried possible and impossible ways to do it, but none of them worked. I also looked at forums such as here:
I don't have all the data filled in the table, so I want "excel" to look for the last row in which the record is and try to calculate the formula and return it to the last cell in column A.
Thank you in advance for all the help
(The formula joins the text together) =CONCATENATE(TEXT(C2;"dd-mm-yyyy");$D$1;E2;$F$1)
Sub AutofilCol()
' Apply to the entire column Autofill
Range("A1").Offset(1, 0).Activate
ActiveCell.FormulaR1C1 = _
"=CONCATENATE(TEXT(RC[2],""dd-mm-yyyy""),R1C4,RC[4],R1C6)"
' AutoFill
Selection.AutoFill Destination:=Range("A2:A").End(xlDown).Row
ActiveCell.EntireColumn.AutoFit
End Sub

Answer 1

It looks like this is what you want to do:-
Sub AutofillCol()
Dim Rl As Long ' last used row in column C
Dim Rng As Range
Rl = Cells(Rows.Count, "C").End(xlUp).Row
Set Rng = Range(Cells(2, "A"), Cells(Rl, "A"))
Rng.FormulaR1C1 = "=CONCATENATE(TEXT(RC[2],""dd-mm-yyyy""),R1C4,RC[4],R1C6)"
End Sub

Answer 2

Copy Formulas (Defining a Range)
In this case, there is no need to Activate (or Select) anything neither is the use of AutoFill (FillDown).
Let's say the first solution is the most flexible (reliable) but also the most complex. To better understand it, see the ranges at the various stages of the code printed in the Immediate window (CTRL+G). The flexibility is in the option to use any first cell address e.g. C5, D10, etc. and it will still work.
Depending on your data, you might easily get away with the remaining two solutions.
I didn't include any solution using End since you got that covered by another post.
Option Explicit
Sub copyFormulas()
Const First As String = "A1"
Dim ws As Worksheet: Set ws = ActiveSheet
Dim fCell As Range ' Last Cell in First Row Range
Dim frg As Range ' First Row Range of Table Range
With ws.Range(First)
Set fCell = .Resize(, .Worksheet.Columns.Count - .Column + 1) _
.Find("*", , xlFormulas, , , xlPrevious)
If fCell Is Nothing Then Exit Sub
Set frg = .Resize(, fCell.Column - .Column + 1)
Debug.Print "First", fCell.Address, frg.Address
End With
Dim tCell As Range ' Last Cell in Table Range
Dim trg As Range ' Table Range
With frg
Set tCell = .Resize(.Worksheet.Rows.Count - .Row + 1) _
.Find("*", , xlFormulas, , xlByRows, xlPrevious)
Set trg = .Resize(tCell.Row - .Row + 1)
End With
Debug.Print "Table", tCell.Address, trg.Address
Dim drg As Range ' Destination Range
Set drg = trg.Columns(1).Resize(trg.Rows.Count - 1).Offset(1)
Debug.Print "Destination", drg.Address
drg.FormulaR1C1 = "=CONCATENATE(TEXT(RC[2],""dd-mm-yyyy""),R1C4,RC[4],R1C6)"
' Or.
'drg.Formula = "=CONCATENATE(TEXT(C2,""dd-mm-yyyy""),$D$1,E2,$F$1)"
End Sub
Sub copyFormulasUsedRange()
With ActiveSheet.UsedRange.Columns(1)
.Resize(.Rows.Count - 1).Offset(1).FormulaR1C1 _
= "=CONCATENATE(TEXT(RC[2],""dd-mm-yyyy""),R1C4,RC[4],R1C6)"
End With
End Sub
Sub copyFormulasCurrentRegion()
With ActiveSheet.Range("A1").CurrentRegion.Columns(1)
.Resize(.Rows.Count - 1).Offset(1).FormulaR1C1 _
= "=CONCATENATE(TEXT(RC[2],""dd-mm-yyyy""),R1C4,RC[4],R1C6)"
End With
End Sub