open a password protected Excel in powershell [duplicate] - excel

Question

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Script to open encrypted excel file, that has a dynamic filename ending in "mmddyyyy"
(2 answers)
Closed 5 years ago.
I'm trying to open a password protected excel sheet in powershell and output a report on how many rows are in the sheet.
the script works absolutely fine if the sheet isn't password protected but I can't seem to get powershell to open it if there is a password set.
my current script is
$Report = "S:\Business Support\excel tests\MI Tool - Live.csv"
$path = "S:\Business Support\excel tests"
[Array]$Results = $null
$excelSheets = Get-Childitem -Path $path -Include "MI Tool - Live.xlsm" -Recurse
$excel = New-Object -comobject Excel.Application
$excel.visible = $false
$password = "blablabla"
$updatelinks = 0
foreach($excelSheet in $excelSheets)
{
$workbook = $excel.Workbooks.Open($excelSheet,$updatelinks,$password)
$rowCount = $null
$worksheet = $workbook.sheets.item("Data")
$rowMax = ($worksheet.usedRange.rows).count
$rowCount += $rowMax
$Results += New-Object Psobject -Property #{
"File Name"=$excelSheet.Name
"Row Count"=$rowCount}
$excelSheet.Name
$workbook.Sheets.count
$rowCount
}
$excel.quit()
Stop-Process -Name EXCEL -Force
$Results | select "File Name","Row Count" | Export-Csv $Report -NoTypeInformation
This is the error I get:
Exception calling "Open" with "3" argument(s): "Open method of Workbooks class failed"
At line:3 char:35
+ $workbook = $excel.Workbooks.Open <<<< ($excelSheet,$updatelinks,$password)
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : ComMethodTargetInvocation
You cannot call a method on a null-valued expression.
At line:5 char:37
+ $worksheet = $workbook.sheets.item <<<< ("Data")
+ CategoryInfo : InvalidOperation: (item:String) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
If I take out the $password variable it works but I then have to enter the password manually.

Answer 1

Your Open overload is incorrect. The password is the 5th variable. Have a look at MSDN to see
expression .Open(FileName, UpdateLinks, ReadOnly, Format, Password, WriteResPassword, IgnoreReadOnlyRecommended, Origin, Delimiter, Editable, Notify, Converter, AddToMru, Local, CorruptLoad)
So you would need to populate ReadOnly and Format first I believe. You would have to populate those values.
$excel.Workbooks.open($path,0,0,5,$password)
Look at the MSDN to understand what the values represent in the 2,3 and 4 positions.