Unicode C Requires Chilkat v11.7.0+

What PDF Text Replacement Does Not Change: Metadata, Links, Form Fields

See more PDF Text Replacement Examples

TextReplace changes the page content only. A placeholder that also appears in the document's metadata (the Title, Author, Subject, Keywords, Creator or Producer), in a link's target URL, or in a form field's value is left as it is and reported in "notReplaced" with "where" saying which. The invoice template's title is "Invoice for {{customer}}" and its "View this invoice online" link points at a URL that holds {{customer}}. Unicode C

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkPdfW pdf;
    HCkJsonObjectW json;
    HCkJsonObjectW jsonOut;
    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.

    //  The PDF used in this example is available at invoice_template.pdf

    pdf = CkPdfW_Create();
    success = CkPdfW_LoadFile(pdf,L"qa_data/pdf/invoice_template.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf));
        CkPdfW_Dispose(pdf);
        return;
    }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(json,L"placeholders.customer",L"Acme Corp");
    //  (The other placeholders are left as they are for this example.)
    CkJsonObjectW_UpdateString(json,L"unusedPlaceholders",L"keep");

    jsonOut = CkJsonObjectW_Create();
    success = CkPdfW_TextReplace(pdf,L"apply",json,jsonOut);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf));
        CkPdfW_Dispose(pdf);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        return;
    }

    wprintf(L"In the page content, customer was replaced %d times.\n",CkJsonObjectW_IntOf(jsonOut,L"replacements[0].count"));

    //  Where else the placeholder occurs, untouched:
    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(jsonOut,L"notReplaced");
    while (i < count_i) {
        CkJsonObjectW_putI(jsonOut,i);
        wprintf(L"not replaced: {{%s}} in %s\n",CkJsonObjectW_stringOf(jsonOut,L"notReplaced[i].field"),CkJsonObjectW_stringOf(jsonOut,L"notReplaced[i].where"));
        i = i + 1;
    }

    success = CkPdfW_WriteFile(pdf,L"qa_output/invoice_customer.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf));
        CkPdfW_Dispose(pdf);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        return;
    }

    //  Sample output:

    //  In the page content, customer was replaced 2 times.
    //  not replaced: {{customer}} in metadata
    //  not replaced: {{customer}} in linkTarget


    CkPdfW_Dispose(pdf);
    CkJsonObjectW_Dispose(json);
    CkJsonObjectW_Dispose(jsonOut);

    }