static public void CompressPdfFile()
{
string pdfString = GetTextFromPdfFile();
HuffmanTree huffmanTree = new HuffmanTree();
Console.WriteLine("Pdf File Read Successfully\n");
// Build the Huffman tree
huffmanTree.Build_Tree(pdfString);
// Encode the input file in BitArray in binary form
BitArray bit_array = huffmanTree.Encode(pdfString);
// Byte array for storing the bits from BitArray to save in bin file
byte[] bytes = new byte[bit_array.Length / 8 + (bit_array.Length % 8 == 0 ? 0 : 1)];
bit_array.CopyTo(bytes, 0);
// write all the bits from byte array in bin file
File.WriteAllBytes(BinaryFile, bytes);
Console.Write("Pdf File Encoded Successfully\n");
// Decode the bin file and write in pdf file
// read all the bytes from binary file
byte[] bytes2 = File.ReadAllBytes(BinaryFile);
var bitarray = new BitArray(bytes2);
// decode the huffman tree
string decoded = huffmanTree.Decode(bitarray);
// write the decoded file in pdf file
iTextSharp.text.Document oDoc = new iTextSharp.text.Document();
PdfWriter.GetInstance(oDoc, new FileStream("C:/Users/Rehman Ali/Desktop/abcd.pdf", FileMode.Create));
oDoc.Open();
oDoc.Add(new iTextSharp.text.Paragraph(decoded));
oDoc.Close();
Console.WriteLine("Pdf File Decoded Successfuly\n");
}
// function for compressing the .txt extension file
static public void CompressTextFile()
{
//Read the text file in string variable
string inputFile = File.ReadAllText(textFile);
HuffmanTree huffmanTree = new HuffmanTree(); // build new Huffman Tree
Console.WriteLine("Text File Read Successfully\n");
// Build the Huffman tree
huffmanTree.Build_Tree(inputFile);
// Encode the input file in BitArray in binary form
BitArray bit_array = huffmanTree.Encode(inputFile);
// Byte array for storing the bits from BitArray to save in bin file
byte[] bytes = new byte[bit_array.Length / 8 + (bit_array.Length % 8 == 0 ? 0 : 1)];
bit_array.CopyTo(bytes, 0);
// write all the bits from byte array in bin file
File.WriteAllBytes(BinaryFile, bytes);
Console.Write("Text File Encoded Successfully\n");
Console.WriteLine();
// Decode the bin file and write in txt file
// read all the bytes from binary file
byte[] bytes2 = File.ReadAllBytes(BinaryFile);
var bitarray = new BitArray(bytes2);
// decode the huffman tree
string decoded = huffmanTree.Decode(bitarray);
// write the decoded file in txt file
File.WriteAllText(decompressedFile, decoded);
Console.WriteLine("Text File Decoded Successfuly\n");
}