Go Requires Chilkat v11.7.0+

Get the Text Block Below a PDF Caption

See more PDF Text Extraction Examples

Demonstrates the "label" option with labelValue "below", which captures the block of text directly under a caption such as "Ship To", ending at the next gap or heading. Combined with layout "lines", the lines of an address block are kept separate. Go

    success := false

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  The packing slip used in this example is available at packing_slip.pdf

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

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

    //  The packing slip has the captions "Bill To" and "Ship To" side by side,
    //  each with an address block below it.
    json.UpdateString("label","Ship To")

    //  "below" means the value is the block of text directly under the label.
    json.UpdateString("labelValue","below")

    //  With the default "flow" layout the lines of the block would be joined into one paragraph.
    //  "lines" keeps each line of the address on its own line.
    json.UpdateString("layout","lines")

    success = pdf.ExtractText("text",json,jsonOut)
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("Ship To:")
    fmt.Println(*jsonOut.StringOf("text"))
    fmt.Println("")

    json.UpdateString("label","Bill To")
    success = pdf.ExtractText("text",json,jsonOut)
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("Bill To:")
    fmt.Println(*jsonOut.StringOf("text"))
    fmt.Println("")

    //  A caption over a short paragraph works the same way.  Here the flow layout is better,
    //  because the two lines are one piece of text.
    json.UpdateString("label","Special Instructions")
    json.UpdateString("layout","flow")
    success = pdf.ExtractText("text",json,jsonOut)
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("Special Instructions:")
    fmt.Println(*jsonOut.StringOf("text"))

    //  Sample output:

    //  Ship To:
    //  Frank Delgado
    //  c/o Harbor Pet Boarding
    //  9 Ferry Lane
    //  Portside, WA 98001
    //  
    //  Bill To:
    //  Frank Delgado
    //  Apartment 3B
    //  41 Mill Street
    //  Portside, WA 98000
    //  
    //  Special Instructions:
    //  Leave the carton with the boarding office if no one answers. Do not leave it outside; the cat tree is not packed for rain.

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