(C) PDF List Unsigned Signature Fields

See more PDF Signatures Examples

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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#include <C_CkPdf.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkPdf pdf;
    BOOL success;
    HCkJsonObject json;
    const char *strVal;
    int i;
    int count_i;

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

    pdf = CkPdf_Create();

    // Load a PDF containing 2 remaining unsigned signature fields:
    success = CkPdf_LoadFile(pdf,"qa_data/pdf/doctor_patient_parent.pdf");
    if (success == FALSE) {
        printf("%s\n",CkPdf_lastErrorText(pdf));
        CkPdf_Dispose(pdf);
        return;
    }

    // Note: This example requires Chilkat v9.5.0.90 or greater.
    json = CkJsonObject_Create();
    CkPdf_GetUnsignedSigFields(pdf,json);

    CkJsonObject_putEmitCompact(json,FALSE);
    printf("%s\n",CkJsonObject_emit(json));

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

    // To iterate over the field names:

    i = 0;
    count_i = CkJsonObject_SizeOfArray(json,"unsignedSigField");
    while (i < count_i) {
        CkJsonObject_putI(json,i);
        strVal = CkJsonObject_stringOf(json,"unsignedSigField[i]");
        printf("%s\n",strVal);
        i = i + 1;
    }



    CkPdf_Dispose(pdf);
    CkJsonObject_Dispose(json);

    }