C# Requires Chilkat v11.7.0+

Extract One Section of a PDF by its Heading

See more PDF Text Extraction Examples

Demonstrates "labelValue": "section", which returns everything from a heading up to the next heading of the same or higher level. With the "markdown" operation the section keeps its own sub-headings. 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 sectioned_doc.pdf

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

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

//  The document has the sections Introduction, Opening Hours, Terms and Conditions (with the
//  sub-sections Admission, Safety and Liability) and Contact.  Get the Terms and Conditions:
//  everything after that heading up to the next heading of the same level (Contact).  The heading
//  itself is not part of the value; labelMatches[0].label has it.
json.UpdateString("label","Terms and Conditions");
json.UpdateString("labelValue","section");

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

Debug.WriteLine(jsonOut.StringOf("markdown"));

//  The same with the "text" operation gives the section as plain text.
success = pdf.ExtractText("text",json,jsonOut);
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Debug.WriteLine("---- as text ----");
Debug.WriteLine(jsonOut.StringOf("text"));

//  Sample output:

//  ### Admission
//  
//  Admission is free. Groups of more than ten should book in advance so that a volunteer can be assigned to them.
//  
//  ### Safety
//  
//  No more than eight people may be on the stair at one time. Children under twelve must be accompanied by an adult, and the lantern room is closed in high winds.
//  
//  ### Liability
//  
//  Visitors climb the tower at their own risk. The society carries public liability insurance but accepts no responsibility for personal property.
//  ---- as text ----
//  Admission
//  
//  Admission is free. Groups of more than ten should book in advance so that a volunteer can be assigned to them.
//  
//  Safety
//  
//  No more than eight people may be on the stair at one time. Children under twelve must be accompanied by an adult, and the lantern room is closed in high winds.
//  
//  Liability
//  
//  Visitors climb the tower at their own risk. The society carries public liability insurance but accepts no responsibility for personal property.