change a cell value in excel using powershell

HI All,

I am using powershell to manipulate an excel spreadsheet.

I am using a vlookup to get data from another sheet and compare it.

I want to delete all rows where the vlookup comes back with #N/A but I am struggling to get it to work.

I tried using this code that I found on a website

for ($i = 1; $i -le $rows; $i++) {
     If ($ws.Item($i,5) = "#N/A") {
         $Range = $ws.Cells.Item($i, 1).EntireRow
         $Range.Delete()
         $i = $i - 1
     }
 }

But that goes through and deletes every row.

does anyone have any ideas?

My code so far is:-

 # Show Excel
 $xl.visible = $true
 $xl.DisplayAlerts = $False
 # Create a workbook
 $wb = $xl.Workbooks.open("x:\messaging\pstfilestest.csv")
 $wb1 = $xl.Workbooks.open("x:\messaging\Batch14a\BAtch14a.csv")
 # Get sheets
 $ws = $wb.WorkSheets.item(1)
 $ws.activate()
 Start-Sleep 1
 $ws.cells.item(1,3).value() = "Alias"
 $ws.Cells.Item(1,4).value() = "UserPrincipalName"
 $ws.Cells.Item(1,5).value() = "DisplayName"
 $ws.Cells.Item(1,6).value() = "Batch"
  $ws.cells.item(2,3).value() = "=LEFT(RC[-1],FIND(""@"",RC[-1])-1)"
 $ws.Cells.Item(2,4).value() = "=LEFT(RC[-2],FIND("".uk"",RC[-2])+2)" 
 $ws.Cells.Item(2,5).value() = "=VLOOKUP(RC[-1],BAtch14a.csv!R1:R1048576,2,FALSE)"
 $ws.Cells.Item(2,6).value() = "Batch14a_001"
  $rows = $ws.range("c2").currentregion.rows.count
 $ws.range("c2:e$rows").formula = $ws.range("c2:e2").formula
 [void]$ws.Cells.Item(1,1).select()
 [void] $ws.cells.EntireColumn.Autofit()
 $Range = $ws.UsedRange
 $R2 = $ws.Range("E1")
 [void] $Range.Sort($R2)

 $Range = $ws.Range("A1:F1").entirecolumn
 $Range.Copy()|Out-Null
 $Range = $ws.Range("A1")
 $Range.PasteSpecial(-4163)

Bottom 4 lines is to paste the values rather than the formula as I thought this might be the issue so I can remove them if needed

TIA

Andy