import multiple csv to excel vba - excel

Question

I want to Import multiples csv file to excel sheet
but when the second csv file open the data of the first csv lost .
Here is my code:
Sub Test_ImportAllFiles()
Dim vaArray As Variant
Dim i As Integer
Dim oFile As Object
Dim oFSO As Object
Dim oFolder As Object
Dim oFiles As Object
sPath = Application.ThisWorkbook.Path & "\cdr"
Set oFSO = CreateObject("Scripting.FileSystemObject")
Set oFolder = oFSO.GetFolder(sPath)
Set oFiles = oFolder.Files
If oFiles.Count = 0 Then Exit Sub
ReDim vaArray(1 To oFiles.Count)
i = 1
For Each oFile In oFiles
vaArray(i) = Application.ThisWorkbook.Path & "\cdr\" & oFile.Name
row_number = CStr(Cells(Rows.Count, 1).End(xlUp).Row)
With Sheets("Sheet2").QueryTables.Add("TEXT;" + vaArray(i), Destination:=Sheets("Sheet2").Range("$A$" + row_number))
.FieldNames = True
.RowNumbers = False
.FillAdjacentFormulas = False
.PreserveFormatting = True
.RefreshOnFileOpen = False
.RefreshStyle = xlInsertDeleteCells
.SavePassword = False
.SaveData = True
.AdjustColumnWidth = False
.RefreshPeriod = 0
.TextFilePromptOnRefresh = False
.TextFilePlatform = 437
.TextFileStartRow = 3
.TextFileParseType = xlDelimited
.TextFileTextQualifier = xlTextQualifierDoubleQuote
.TextFileConsecutiveDelimiter = False
.TextFileTabDelimiter = False
.TextFileSemicolonDelimiter = False
.TextFileCommaDelimiter = True
.TextFileSpaceDelimiter = False
.TextFileTrailingMinusNumbers = True
.Refresh BackgroundQuery:=False
End With
Dim wb_connection As WorkbookConnection
For Each wb_connection In ActiveWorkbook.Connections
If InStr(vaArray(i), wb_connection.Name) > 0 Then
wb_connection.Delete
MsgBox "Antonis" & i
End If
Next wb_connection
i = i + 1
Next
End Sub

Answer 1

When you count the number of rows, you are referring to the active sheet, and that's possibly not the sheet where you want to write the data to.
Try something like
Dim x as long
With Sheets("Sheet2")
row_number = .Cells(.Rows.Count, 1).End(xlUp).Row)
if row_number > 1 then row_number = row_number + 1
end With
With Sheets("Sheet2").QueryTables.Add("TEXT;" + vaArray(i), _
Destination:=Sheets("Sheet2").Range("$A$" & row_number))
Update: Add one to row_number, else the ranges will overlap, and as a QueryTable may not overlap, Excel moves them.
And yes, you can use a number for the rowcount variable, you just have to change the string concatenation from + to &. The operator + works for concatenation only if both sides are strings, while & does an implicit conversion to string for all data types.