Telerik Report Helper

TelerikReportHelper.cs

namespace UI.Helpers
{
  using System;
  using System.Collections;
  using System.Collections.Generic;
  using System.Drawing;
  using System.Drawing.Imaging;
  using System.IO;
  using System.Text;
  using Telerik.Reporting.Processing;
  using Report = Telerik.Reporting.Report;

  public static class ReportHelpers
  {
    public static byte[] ReportToJpeg(this Report report, int pageNumber = 1)
    {
      try
      {
        pageNumber = pageNumber - 1;

        var deviceInfo = new Hashtable();

        deviceInfo["OutputFormat"] = "JPEG";

        string documentName;

        var mlist = new MemoryStreamList();

        var reportProcessor = new ReportProcessor();

        reportProcessor.RenderReport("IMAGE", report, deviceInfo, mlist.CreateStream, out documentName);

        var bytes = new byte[mlist[pageNumber].Length];

        mlist[pageNumber].Seek(0, SeekOrigin.Begin);

        mlist[pageNumber].Read(bytes, 0, bytes.Length);

        bytes = mlist[pageNumber].ToArray();

        return bytes;
      }
      catch (Exception ex)
      {
        throw new Exception(ex.Message, ex.InnerException);
      }
    }

    public static byte[] MergeTwoImages(this byte[] firstByteArray, byte[] secondByteArray)
    {
      var firstImage = firstByteArray.ByteArrayToImage();

      var secondImage = secondByteArray.ByteArrayToImage();

      var outputImage = new Bitmap(firstImage.Width, firstImage.Height + secondImage.Height);

      var g = Graphics.FromImage(outputImage);

      g.Clear(Color.White);

      g.DrawImage(firstImage, new Point(0, 0));

      g.DrawImage(secondImage, new Point(0, firstImage.Height));

      g.Dispose();

      firstImage.Dispose();

      secondImage.Dispose();

      var bytes = outputImage.ImageToByteArray();

      outputImage.Dispose();

      return bytes;
    }

    public static Image ByteArrayToImage(this byte[] byteArray)
    {
      var ms = new MemoryStream(byteArray);

      var returnImage = Image.FromStream(ms);

      return returnImage;
    }

    public static byte[] ImageToByteArray(this Image image)
    {
      var ms = new MemoryStream();

      image.Save(ms, ImageFormat.Jpeg);

      return ms.ToArray();
    }
  }

  public class MemoryStreamList : List<MemoryStream>
  {
      public Stream CreateStream(string name, string extension, Encoding encoding, string mimeType)
      {
          var m = new MemoryStream();

          this.Add(m);

          return m;
      }
  }
}