Unicode 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.

Unicode C

#include <C_CkPdfW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkPdfW pdf;
    HCkJsonObjectW json;
    const wchar_t *strVal;
    int i;
    int count_i;

    success = FALSE;

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

    pdf = CkPdfW_Create();

    // Load a PDF containing 2 remaining unsigned signature fields:
    success = CkPdfW_LoadFile(pdf,L"qa_data/pdf/doctor_patient_parent.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf));
        CkPdfW_Dispose(pdf);
        return;
    }

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

    CkJsonObjectW_putEmitCompact(json,FALSE);
    wprintf(L"%s\n",CkJsonObjectW_emit(json));

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

    // To iterate over the field names:

    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(json,L"unsignedSigField");
    while (i < count_i) {
        CkJsonObjectW_putI(json,i);
        strVal = CkJsonObjectW_stringOf(json,L"unsignedSigField[i]");
        wprintf(L"%s\n",strVal);
        i = i + 1;
    }



    CkPdfW_Dispose(pdf);
    CkJsonObjectW_Dispose(json);

    }