Insert an Image Into a PDF in C#

Introduction

We will create a simple PDF grid and show how to insert an image into a specific PDF grid cell in C#. Images are more attractive for reading documents. Images are related to the contents. Sometimes, an image can describe some content more clearly, like using a chart to show how data changes in a period.

Spire.PDF for .NET is a professional .NET PDF component to quickly generate, open, modify and save PDF documents without using Office Automation and enables users to insert an image into a PDF and set its size depending on the page using C#. How to draw a nested grid in a PDF document and set a grid row & cell format. In the second part you understand how to Encrypt a PDF document with a password. This guide introduces an easy way to insert an image via Spire.PDF for .NET.

Create a Console Application for the demo. Use the following procedure:

1. Open Visual Studio.
2. "File" -> "New" -> "Project...".
3. Select C# Language then select Console Application and name it “InsertImageToPDF”.
4. Click OK.
5. Insert the following code for inserting an image into the PDF.
   

      private static void InsertImageIntoPDF()
      {
          try
          {
              //Path to Store PDF file
             string outputFile = "result.pdf";
              //Create a PDF document using Spire.PDF.dll
        PdfDocument doc = new PdfDocument();
              //Add a page
              PdfPageBase page = doc.Pages.Add();
   
              //Create a pdf grid
              PdfGrid grid = new PdfGrid();
   
              //Set the cell padding of pdf grid
              grid.Style.CellPadding = new PdfPaddings(1, 1, 1, 1);
   
              //Add a row for pdf grid
              PdfGridRow row = grid.Rows.Add();
   
              //Add two columns for pdf grid
              grid.Columns.Add(4);
              float width = page.Canvas.ClientSize.Width - (grid.Columns.Count + 1);
   
              //Set the width of the first column
              grid.Columns[0].Width = width * 0.20f;
              grid.Columns[1].Width = width * 0.20f;
              grid.Columns[2].Width = width * 0.20f;
              grid.Columns[3].Width = width * 0.20f;
   
              //Add a image
              PdfGridCellTextAndStyleList lst = new PdfGridCellTextAndStyleList();
              PdfGridCellTextAndStyle textAndStyle = new PdfGridCellTextAndStyle();
              textAndStyle.Image = PdfImage.FromFile("ccorner.jpg");
   
              //Set the size of image
    textAndStyle.ImageSize = new SizeF(70,70);
              lst.List.Add(textAndStyle);
   
              //Add a image into the first cell.
              row.Cells[1].Value = lst;
   
              //Draw pdf grid into page at the specific location
              PdfLayoutResult result = grid.Draw(page, new PointF(10, 30));
   
              //Save to a pdf file
   doc.SaveToFile(outputFile, FileFormat.PDF);
   
          }
          catch (Exception)
          {
              throw;
          }
    }

6. The following code encrypts the PDF document.
   

     private static void EncryptPDF()
     {
         try
         {
             //Create a pdf document.
             PdfDocument doc = new PdfDocument();
             doc.LoadFromFile(@"result.pdf");
   
             //encrypt
             doc.Security.KeySize = PdfEncryptionKeySize.Key128Bit;
             doc.Security.OwnerPassword = "test";
             doc.Security.UserPassword = "test";
             doc.Security.Permissions = PdfPermissionsFlags.Print | PdfPermissionsFlags.FillFields;
   
             doc.SaveToFile(@"Result_Encrypted.pdf");
             doc.Close();
             System.Diagnostics.Process.Start(@"Result_Encrypted.pdf");
         }
         catch (Exception)
         {
             throw;
         }
   }

7. Save and run it. It will show output like the following.

Output

First it will show like the following to enter a password and click OK.



It will show like the following image.



Note: For detailed code please download the Zip file attached above.

Summary

I hope you now understand how to insert images into PDF documents programmatically and encrypt a PDF and make it password protected. If you have any suggestion regarding this article then please contact me.

The contents used are from Spire.PDF; for more information click here.