PowerShell Requires Chilkat v11.7.0+

Put a Letterhead Behind the First Page of a PDF

See more PDF Watermark Examples

Demonstrates the pdfPage type, which places a page of another PDF as the watermark. It is the way to use a letterhead, a cover overlay or a vector logo that was saved as a PDF, and unlike an image it stays sharp at any size because it is drawn, not resampled. "zOrder" set to back puts it behind the existing content, where a letterhead belongs, and "pages" set to first restricts it to page one. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  The PDF used in this example is available at two_page_memo.pdf

#  The PDF used in this example is available at letterhead.pdf

$pdf = New-Object Chilkat.Pdf
$success = $pdf.LoadFile("qa_data/pdf/two_page_memo.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$json = New-Object Chilkat.JsonObject
$json.UpdateString("type","pdfPage")
$json.UpdateString("pdf.path","qa_data/pdf/letterhead.pdf")

#  The page of the source PDF to use (1 by default).  "match" instead of a number places source
#  page n on target page n, which suits a set of per-page backgrounds.
$json.UpdateInt("pdf.page",1)

#  Behind the memo's own text, on page one, scaled to the page.
$json.UpdateString("zOrder","back")
$json.UpdateString("pages","first")
$json.UpdateString("scale.fit","page")
$json.UpdateString("id","letterhead")

$jsonOut = New-Object Chilkat.JsonObject
$success = $pdf.Watermark("add",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("id: " + $jsonOut.StringOf("id") + " pages: " + $jsonOut.StringOf("pages"))

$success = $pdf.WriteFile("qa_output/memo_letterhead.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

#  Sample output:

#  id: letterhead pages: 1