Covert a range to string values using array - excel

Question

I want to convert a range of cells from integer to String. However, since I have so much data, I can't use a standard loop for ranges as it takes too long.
Instead I thought to use the array and convert the desired range(array) into string values.
This is what I tried to do by modifying my standardcode that converts range into string just instead range I would use in the below the array:
Sub CovertToString()
Dim ws As Worksheet
Set ws = Sheets("Sheet1")
Dim sArray As Variant
Dim LastRow As Integer
Dim cell As Variant
With ws
LastRow = .Cells(.rows.Count, 1).End(xlUp).row
sArray = .Range(.Cells(1, 8), .Cells(LastRow, 8))
For Each cell In sArray
cell = "'" & cell.Value
Next
End With
End Sub
Unfortunately, It does not work which I understand as I am not sure how to correct it.

Answer 1

This way will convert the cell formats to Text:
Sub ConvertToString()
Dim ws As Worksheet
Dim LastCell As Range
Dim rCell As Range
Set ws = ThisWorkbook.Worksheets("Sheet1")
With ws
Set LastCell = .Cells(.Rows.Count, 1).End(xlUp).Offset(, 7)
'Convert format to 'Text'
.Range(.Cells(1, 8), LastCell).NumberFormat = "#"
End With
End Sub
This way will copy the range to an array and add a ' to each value before posting back to the sheet:
Sub ConvertToString()
Dim ws As Worksheet
Dim LastCell As Range
Dim vValues() As Variant
Dim R As Long
Set ws = ThisWorkbook.Worksheets("Sheet1")
With ws
'Your code is looking for last cell in column A, so offset to column H once found.
'This is a reference to the last cell, not the row number so can be used in the range.
Set LastCell = .Cells(.Rows.Count, 1).End(xlUp).Offset(, 7)
vValues = .Range(.Cells(1, 8), LastCell).Value
'Add a ' to each value.
For R = 1 To UBound(vValues, 1)
vValues(R, 1) = "'" & vValues(R, 1)
Next R
'Paste back to sheet.
.Range(.Cells(1, 8), LastCell) = vValues
End With
End Sub
Further reading on arrays & worksheets