Merge Two or More Images into One Image

Introduction

This trick will help you to merge two or more images (.jpg/.tiff/.png) into one image (.jpg/.tiff/.png).

Background

In one of my project scenarios, there is a need to combine 2 images into one image for further document processing. (For example: suppose my invoice of number #123 (2 page invoice) gets divided into 2 different pages and here I want to combine these pages into one for next level processing.

Using the Code

Here, you have to add reference for:

using System.Drawing;
using System.Drawing.Imaging; using System.IO;

In this example, I tried to Merge two "TIFF" files into one "TIFF". For example: Merge "1.tif" (2 pages) with "2.tif" (1 page) and make this 3 pager image as "1.tif". You can try for .Jpg, .Png, etc. image types.

localTaskSourceFile and localTaskToFile are physical path of files on local machine.

 private void button1_Click(object sender, EventArgs e)
        {
             try
            {
             string From_Document_ImagePath = "C:\\1.tif";
             string To_Document_ImagePath = "C:\\2.tif";
                 MergeDocument(From_Document_ImagePath, To_Document_ImagePath);
             }
             catch (Exception ex)
             {    
                        throw;
             }            
        } 

public void MergeDocument(string localTaskSourceFile, string localTaskToFile)
        {
            try
            {
                //Here I want to Merge 2 Images into 1 Image  
                //(I want to merge localTaskToFile into localTaskSourceFile file)
                // you can go for multiple files by changing BitMap to BitMap array
                string FilePath = Path.GetDirectoryName(localTaskSourceFile);
                string NewFile = Path.Combine(FilePath, Guid.NewGuid().ToString() + ".tif");

                System.Drawing.Imaging.Encoder encoder = System.Drawing.Imaging.Encoder.SaveFlag;
                ImageCodecInfo CodecInfo = 
                ImageCodecInfo.GetImageEncoders().First(i => i.MimeType == "image/tiff");
                EncoderParameters EncoderParameters = new EncoderParameters(1);

                Bitmap FromImage = (Bitmap)Image.FromFile(localTaskSourceFile);
                Bitmap currentToImage = (Bitmap)Image.FromFile(localTaskToFile);
                
                int Frompages = FromImage.GetFrameCount(FrameDimension.Page);
                int Topages = currentToImage.GetFrameCount(FrameDimension.Page);
               
                EncoderParameters.Param[0] = 
                new EncoderParameter(encoder, (long)EncoderValue.MultiFrame);
                FromImage.Save(NewFile, CodecInfo, EncoderParameters);
  
                for (int counter = 1; counter < Frompages; counter++)
                {
                    FromImage.SelectActiveFrame(FrameDimension.Page, counter);
                    EncoderParameters.Param[0] = 
                    new EncoderParameter(encoder, (long)EncoderValue.FrameDimensionPage);
                    FromImage.SaveAdd(FromImage, EncoderParameters);
                }

                for (int counter = 0; counter < Topages; counter++)
                {
                    currentToImage.SelectActiveFrame(FrameDimension.Page, counter);
                    EncoderParameters.Param[0] = 
                    new EncoderParameter(encoder, (long)EncoderValue.FrameDimensionPage);
                    FromImage.SaveAdd(currentToImage, EncoderParameters);
                }

                FromImage.Dispose();
                currentToImage.Dispose();

                FromImage = null;
                currentToImage = null;

                File.Delete(localTaskSourceFile);
                File.Move(NewFile, localTaskSourceFile);
                File.Delete(NewFile);
            }
            catch (Exception ex)
            {
                throw;
            }
        }        

Hope this article is useful to you!

Points of Interest

I have combined 2 images into one Image. You can try for different image types.

History

• 25^th November, 2016: Initial version