(Lianja) PDF List Unsigned Signature Fields

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Demonstrates how to list the unsigned signature fields in a PDF.

Note: This example requires Chilkat v9.5.0.90 or greater.

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

loPdf = createobject("CkPdf")

// Load a PDF containing 2 remaining unsigned signature fields:
llSuccess = loPdf.LoadFile("qa_data/pdf/doctor_patient_parent.pdf")
if (llSuccess = .F.) then
    ? loPdf.LastErrorText
    release loPdf
    return
endif

// Note: This example requires Chilkat v9.5.0.90 or greater.
loJson = createobject("CkJsonObject")
loPdf.GetUnsignedSigFields(loJson)

loJson.EmitCompact = .F.
? loJson.Emit()

// Result:
// {
//   "unsignedSigField": [
//     "doctor_signature",
//     "parent_signature"
//   ]
// }

// To iterate over the field names:

i = 0
lnCount_i = loJson.SizeOfArray("unsignedSigField")
do while i < lnCount_i
    loJson.I = i
    lcStrVal = loJson.StringOf("unsignedSigField[i]")
    ? lcStrVal
    i = i + 1
enddo


release loPdf
release loJson