Excel workbooks.saveas() error in powershell - excel

Question

I'm trying to convert .xls files to .xlxs
I tried many variations of this code but every time i'm facing this error message :
Exception lors de l'appel de « SaveAs » avec « 2 » argument(s) : « La
méthode SaveAs de la classe Workbook a échoué. » Au caractère
C:\temp\xlsx.ps1:18 : 6
try{$opendoc.saveas($basename, $saveFormat)}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CategoryInfo : NotSpecified: (:) [], MethodInvocationException
FullyQualifiedErrorId : ComMethodTargetInvocation
Here is my code :
$excel = new-object -comobject excel.application
$excel.Visible = $false
$saveFormat = "xlOpenXMLWorkbook";
ls c:\temp\*.xls | %{
$opendoc = $excel.workbooks.open($_.FullName)
$excel.DisplayAlerts =$false
$basename = $_.basename
try{
$opendoc.saveas($basename,$saveFormat,$null,$null,$false,$false,"xlNoChange","xlLocalSessionChanges")
# tried this one and got same error : $opendoc.saveas($basename, $saveFormat)}
}
catch{
$opendoc.close();$excel.quit()
$_
}
$opendoc.close();
}
$excel.quit()
do you know the working recipe please ?

Answer 1

Constants passed into the SaveAs method usually represent numeric values, not strings. In your case the second parameter probably should be 51 (xlWorkbookDefault) as documented here. Same goes for the other two strings ("xlNoChange", which should be 1, and "xlLocalSessionChanges", which should be 2). You need to either use the numeric values, or define the constants yourself, e.g.:
$xlWorkbookDefault = 51
$xlNoChange = 1
$xlLocalSessionChanges = 2
Also, you cannot use $null for arguments that should retain default values. Use [Type]::Missing instead.
Change this:
$opendoc.saveas($basename,$saveFormat,$null,$null,$false,$false,"xlNoChange","xlLocalSessionChanges")
into this:
$opendoc.SaveAs($basename, 51, [Type]::Missing, [Type]::Missing, $false, $false, 1, 2)