Go 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. Go

    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

    pdf := chilkat.NewPdf()
    success = pdf.LoadFile("qa_data/pdf/invoice_labels.pdf")
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        return
    }

    json := chilkat.NewJsonObject()
    jsonOut := chilkat.NewJsonObject()

    //  "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 {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("default: ok = ", *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 {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("ignore: applied = ", *jsonOut.BoolOf("applied"), ", replacements: ", jsonOut.SizeOfArray("replacements"))

    success = pdf.WriteFile("qa_output/invoice_renumbered.pdf")
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    //  Sample output:

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

    pdf.DisposePdf()
    json.DisposeJsonObject()
    jsonOut.DisposeJsonObject()