PowerShell Requires Chilkat v11.7.0+

Get a PDF Field Value by its Label (Value to the Right)

See more PDF Text Extraction Examples

Demonstrates the "label" option, which captures the text that belongs to a caption such as "Invoice Number:" without needing coordinates. With labelValue "right", the value is the rest of the label's line. Label matching ignores case, extra spaces and a trailing colon. 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 invoice used in this example is available at invoice_labels.pdf

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

$json = New-Object Chilkat.JsonObject
$jsonOut = New-Object Chilkat.JsonObject

#  The invoice has lines such as "Invoice Number:   INV-2026-0412".
#  The label option restricts the "text" operation to the text belonging to the label.
$json.UpdateString("label","Invoice Number")

#  "right" means the value is the rest of the label's line.
#  (The default, "auto", uses the rest of the line if there is text there, otherwise the block below.)
$json.UpdateString("labelValue","right")

$success = $pdf.ExtractText("text",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

#  The value is returned as the text.
$("Invoice Number: " + $jsonOut.StringOf("text"))

#  The labelMatches array tells where the label was found and how it appeared in the PDF.
$("Found on page " + $jsonOut.IntOf("labelMatches[0].page") + " as `"" + $jsonOut.StringOf("labelMatches[0].label") + "`"")

#  Matching ignores case and the trailing colon, so these all work:
$json.UpdateString("label","CUSTOMER:")
$success = $pdf.ExtractText("text",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("Customer: " + $jsonOut.StringOf("text"))

$json.UpdateString("label","due date")
$success = $pdf.ExtractText("text",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("Due Date: " + $jsonOut.StringOf("text"))

#  The totals at the foot of the invoice are right-aligned labels with the amount beside them.
$json.UpdateString("label","Total Due")
$success = $pdf.ExtractText("text",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("Total Due: " + $jsonOut.StringOf("text"))

#  A label that is not found is not an error.  The text is empty, labelMatches is empty,
#  and the quality report has an issue with the code "labelNotFound".
$json.UpdateString("label","Tracking Number")
$success = $pdf.ExtractText("text",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

if ($jsonOut.SizeOfArray("labelMatches") -eq 0) {
    $("Tracking Number: (not found) " + $jsonOut.StringOf("quality.pages[0].issues[0].code"))
}

#  Sample output:

#  Invoice Number: INV-2026-0412
#  Found on page 1 as "Invoice Number:"
#  Customer: Northwind Traders
#  Due Date: April 13, 2026
#  Total Due: $1,234.53
#  Tracking Number: (not found) labelNotFound