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}}. C++

#include <CkPdf.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool 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

    CkPdf pdf;
    success = pdf.LoadFile("qa_data/pdf/invoice_template.pdf");
    if (success == false) {
        std::cout << pdf.lastErrorText() << "\r\n";
        return;
    }

    CkJsonObject json;
    json.UpdateString("placeholders.customer","Acme Corp");
    //  (The other placeholders are left as they are for this example.)
    json.UpdateString("unusedPlaceholders","keep");

    CkJsonObject jsonOut;
    success = pdf.TextReplace("apply",json,jsonOut);
    if (success == false) {
        std::cout << pdf.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "In the page content, customer was replaced " << jsonOut.IntOf("replacements[0].count") << " times." << "\r\n";

    //  Where else the placeholder occurs, untouched:
    int i = 0;
    int count_i = jsonOut.SizeOfArray("notReplaced");
    while (i < count_i) {
        jsonOut.put_I(i);
        std::cout << "not replaced: {{" << jsonOut.stringOf("notReplaced[i].field") << "}} in " << jsonOut.stringOf("notReplaced[i].where") << "\r\n";
        i = i + 1;
    }

    success = pdf.WriteFile("qa_output/invoice_customer.pdf");
    if (success == false) {
        std::cout << pdf.lastErrorText() << "\r\n";
        return;
    }

    //  Sample output:

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