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.

C

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkPdf pdf;
    HCkJsonObject json;
    const char *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 = 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);

    }