Convert to Unix Epoch Time

private string ConvertUnixEpochTime(long epoch)

{

    try

{

long baseTicks = 621355968000000000;

long tickResolution = 10000000;

long epochNegative = 1000000000;

long epochTicks = (epoch - epochNegative * tickResolution) + baseTicks; string date = new DateTime(epochTicks, DateTimeKind.Utc).ToString();

return date;

}

catch (Exception exp)

{

}

return string.Empty;

}

Kullanımı :

private void button1_Click(object sender, EventArgs e)

{

txtMesaj.Text = ConvertUnixEpochTime(epoch format);

}

DeflateStream ile Compress ve Decompress

Byte türündeki dataları sıkıştırmaya yarayan DeflateStream ile yazılan Compress ve Decompress Methodları...

using System.IO;

using System.IO.Compression;

using System;

public static class Deflate

    {

        public static byte[] Compress(byte[] Bytes)

        {

            if (Bytes == null)

                throw new ArgumentNullException("Bytes");

            using (MemoryStream Stream = new MemoryStream())

            {

                using (DeflateStream ZipStream = new DeflateStream(Stream, CompressionMode.Compress, true))

                {

                    ZipStream.Write(Bytes, 0, Bytes.Length);

                    ZipStream.Close();

                    return Stream.ToArray();

                }

            }

        }

        public static byte[] Decompress(byte[] Bytes)

        {

            if (Bytes == null)

                throw new ArgumentNullException("Bytes");

            using (MemoryStream Stream = new MemoryStream())

            {

                using (DeflateStream ZipStream = new DeflateStream(new MemoryStream(Bytes), CompressionMode.Decompress, true))

                {

                    byte[] Buffer = new byte[4096];

                    while (true)

                    {

                        int Size = ZipStream.Read(Buffer, 0, Buffer.Length);

                        if (Size > 0) Stream.Write(Buffer, 0, Size);

                        else break;

                    }

                    ZipStream.Close();

                    return Stream.ToArray();

                }

            }

        }

Verman Encryption-Decryption

One-time pad belirli usullerle karıştırılmış harflerden oluşturulan tek kullanımlık şifreleme yöntemidir. Bir diğer adı ise Vernam şifreleme yöntemidir.

    public static class VernamEncryption
    {
         public static string Encrypt(string Input, string Key)
        {
            return Process(Input, Key);
        }
        public static string Decrypt(string Input, string Key)
        {
            return Process(Input, Key);
        }
        private static string Process(string Input, string Key)
        {
            if (string.IsNullOrEmpty(Input))
                throw new ArgumentNullException("Input");
            if (string.IsNullOrEmpty(Key))
                throw new ArgumentNullException("Key");
            if (Input.Length != Key.Length)
            {
                throw new ArgumentException("Key is not the same length as the input string");
            }
            ASCIIEncoding Encoding = new ASCIIEncoding();
            byte[] InputArray = Encoding.GetBytes(Input);
            byte[] KeyArray = Encoding.GetBytes(Key);
            byte[] OutputArray = new byte[InputArray.Length];
            for (int x = 0; x < InputArray.Length; ++x)
            {
                OutputArray[x] = (byte)(InputArray[x] ^ Key[x]);
            }
            return Encoding.GetString(OutputArray);
        }
    }

Screenshot Class

Projelerinizde kullanabileceğiniz klavyedeki PrintScreen tuşunun görevini yapan class örneği...

using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using System;

 public static class Screenshot

    {

        public static void TakeScreenShot(string FileName)

        {

            if (string.IsNullOrEmpty(FileName))

                throw new ArgumentNullException("FileName");

            using (Bitmap TempBitmap = Screenshot.TakeScreenShot())

            {

                TempBitmap.Save(FileName);

            }

        }

        public static Bitmap TakeScreenShot()

        {

            Rectangle TotalScreenRect = Rectangle.Empty;

            foreach (Screen CurrentScreen in Screen.AllScreens)

            {

                TotalScreenRect = Rectangle.Union(TotalScreenRect, CurrentScreen.Bounds);

            }

            Bitmap TempBitmap = new Bitmap(TotalScreenRect.Width, TotalScreenRect.Height, PixelFormat.Format32bppArgb);

            using (Graphics TempGraphics = Graphics.FromImage(TempBitmap))

            {

                TempGraphics.CopyFromScreen(TotalScreenRect.X, TotalScreenRect.Y, 0, 0, TotalScreenRect.Size, CopyPixelOperation.SourceCopy);

            }

            return TempBitmap;

        }

    }

ItextSharp ConcetenatePDF

Var olan bir pdf deki verileri yeniden oluşturacağımız bir pdf e kopyalamak için yazmış olduğum bir method iyi günlerde kullanmanız dileğiyle...

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using iTextSharp.text.pdf;
using iTextSharp.text;

        public void ConcetenatePDF(String sourcePdf, String[] destinationPdf)

        {

            Document doc = new Document();

            PdfCopy copy = new PdfCopy(doc, new FileStream(sourcePdf, FileMode.Create));

            doc.Open();

            PdfReader reader;

            int n;

            for (int i = 0; i < destinationPdf.Length; i++)

            {

                reader = new PdfReader(destinationPdf[i]);

                n = reader.NumberOfPages;

                for (int page = 0; page < n; )

                {

                    copy.AddPage(copy.GetImportedPage(reader, ++page));

                }

                copy.FreeReader(reader);

            }

            doc.Close();

        }