kmpdfkit_demo/Demo/Examples/Samples/FlattenTest/FlattenTest.cs

using ComPDFKit.PDFDocument;
using ComPDFKit.PDFPage;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FlattenTest
{
    internal class FlattenTest
    {
        static private string outputPath = Path.GetDirectoryName(Path.GetDirectoryName(Path.GetDirectoryName(System.IO.Directory.GetCurrentDirectory()))) + "\\Output\\Flatten";
        static void Main(string[] args)
        {
            Console.WriteLine("Running Flatten test sample…\r\n");
            SDKLicenseHelper.LicenseVerify();
            CPDFDocument document = CPDFDocument.InitWithFilePath("Annotations.pdf");
            if (!Directory.Exists(outputPath))
            {
                Directory.CreateDirectory(outputPath);
            }

            if (Flatten(document))
            {
                Console.WriteLine("Flatten done.");
            }
            else
            {
                Console.WriteLine("Flatten failed.");
            }
            Console.WriteLine("--------------------");
            Console.WriteLine("Done");
            Console.WriteLine("--------------------");

            Console.ReadLine();
        }

        static private bool Flatten(CPDFDocument document)
        {
            int annotationCount = 0;
            for (int i = 0; i < document.PageCount; i++)
            {
                CPDFPage page = document.PageAtIndex(i);
                annotationCount += page.GetAnnotCount();
            }
            Console.Write("{0} annotations in the file. ", annotationCount);
            string flattenPath = outputPath + "\\FlattenTest.pdf";
            if (document.WriteFlattenToFilePath(flattenPath))
            {
                Console.WriteLine("Browse the changed file in " + flattenPath);
            }
            else
            {
                return false;
            }
            CPDFDocument flattenDocument = CPDFDocument.InitWithFilePath(flattenPath);
            int newCount = 0;
            for (int i = 0; i < flattenDocument.PageCount; i++)
            {
                CPDFPage page = flattenDocument.PageAtIndex(i);
                newCount += page.GetAnnotCount();
            } 
            Console.WriteLine("{0} annotations in the new file. ", newCount);
            if (newCount == 0)
            {
                return true;
            }
            else
            {
                return false;
            } 
        }
    }
}