.NET Core C# Requires Chilkat v11.7.0+

A PDF Label That Is Not on the Page: notFound or Ignore

See more PDF Text Replacement Examples

Demonstrates the "unmatchedValues" option. A label or placeholder given a value but not found on the selected pages is a problem with the reason notFound, which stops "apply", because a missing label usually means the wrong document or a typo in the label. With unmatchedValues "ignore" such a value is skipped and the rest is applied -- the right choice when one set of values serves several document layouts. .NET Core C#

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_labels.pdf

Chilkat.Pdf pdf = new Chilkat.Pdf();
success = pdf.LoadFile("qa_data/pdf/invoice_labels.pdf");
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Chilkat.JsonObject json = new Chilkat.JsonObject();
Chilkat.JsonObject jsonOut = new Chilkat.JsonObject();

//  "Tracking Number:" is not on this invoice.
json.UpdateString("labels[0].label","Invoice Number:");
json.UpdateString("labels[0].value","INV-2026-0500");
json.UpdateString("labels[1].label","Tracking Number:");
json.UpdateString("labels[1].value","1Z999AA10123456784");

success = pdf.TextReplace("check",json,jsonOut);
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Debug.WriteLine("default: ok = " + Convert.ToString(jsonOut.BoolOf("ok")) + ", problem: \"" + jsonOut.StringOf("problems[0].label") + "\" " + jsonOut.StringOf("problems[0].reason"));

//  With "ignore", the label that is not there is skipped.
json.UpdateString("unmatchedValues","ignore");
success = pdf.TextReplace("apply",json,jsonOut);
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Debug.WriteLine("ignore: applied = " + Convert.ToString(jsonOut.BoolOf("applied")) + ", replacements: " + Convert.ToString(jsonOut.SizeOfArray("replacements")));

success = pdf.WriteFile("qa_output/invoice_renumbered.pdf");
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

//  Sample output:

//  default: ok = false, problem: "Tracking Number:" notFound
//  ignore: applied = true, replacements: 1