.NET Core C# 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. .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 packing slip used in this example is available at packing_slip.pdf

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

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

//  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) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Debug.WriteLine("Ship To:");
Debug.WriteLine(jsonOut.StringOf("text"));
Debug.WriteLine("");

json.UpdateString("label","Bill To");
success = pdf.ExtractText("text",json,jsonOut);
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Debug.WriteLine("Bill To:");
Debug.WriteLine(jsonOut.StringOf("text"));
Debug.WriteLine("");

//  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) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Debug.WriteLine("Special Instructions:");
Debug.WriteLine(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.