Go 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}}. 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_template.pdf

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

    json := chilkat.NewJsonObject()
    json.UpdateString("placeholders.customer","Acme Corp")
    //  (The other placeholders are left as they are for this example.)
    json.UpdateString("unusedPlaceholders","keep")

    jsonOut := chilkat.NewJsonObject()
    success = pdf.TextReplace("apply",json,jsonOut)
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("In the page content, customer was replaced ", jsonOut.IntOf("replacements[0].count"), " times.")

    //  Where else the placeholder occurs, untouched:
    i := 0
    count_i := jsonOut.SizeOfArray("notReplaced")
    for i < count_i {
        jsonOut.SetI(i)
        fmt.Println("not replaced: {{", *jsonOut.StringOf("notReplaced[i].field"), "}} in ", *jsonOut.StringOf("notReplaced[i].where"))
        i = i + 1
    }

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

    //  Sample output:

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

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