(.NET Core C#) 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.

Chilkat.Pdf pdf = new Chilkat.Pdf();

// Load a PDF containing 2 remaining unsigned signature fields:
bool success = pdf.LoadFile("qa_data/pdf/doctor_patient_parent.pdf");
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

// Note: This example requires Chilkat v9.5.0.90 or greater.
Chilkat.JsonObject json = new Chilkat.JsonObject();
pdf.GetUnsignedSigFields(json);

json.EmitCompact = false;
Debug.WriteLine(json.Emit());

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

// To iterate over the field names:
string strVal;

int i = 0;
int count_i = json.SizeOfArray("unsignedSigField");
while (i < count_i) {
    json.I = i;
    strVal = json.StringOf("unsignedSigField[i]");
    Debug.WriteLine(strVal);
    i = i + 1;
}