How to set the background color of a PDF document using iTextSharp

You can create a Rectangle object and set its BackgroundColor property. Use your Rectangle to initialize your Document.

Imports System
Imports System.IO

Imports iTextSharp.text
Imports iTextSharp.text.pdf

Public Class Chap0102

    Public Shared Sub Main()
        Console.WriteLine("Chapter 1 example 2: PageSize")

        ' step 1: creation of a document-object
        Dim pageSize As New Rectangle(144, 720)
        pageSize.BackgroundColor = New Color(&Hff, &Hff, &Hde) 
     '// pageSize.BackgroundColor.BackgroundColor = BaseColor.WHITE
        Dim document As New Document(pageSize)

        Try

            ' step 2:
            ' we create a writer that listens to the document
            ' and directs a PDF-stream to a file

            PdfWriter.getInstance(document, New FileStream("Chap0102.pdf", FileMode.Create))

            ' step 3: we open the document
            document.Open()

            ' step 4: we Add some paragraphs to the document
            For i As Integer = 0 To 4
                document.Add(New Paragraph("Hello World"))

            Next
        Catch de As DocumentException
            Console.[Error].WriteLine(de.Message)
        Catch ioe As IOException
            Console.[Error].WriteLine(ioe.Message)
        End Try

        ' step 5: we close the document
        document.Close()
    End Sub
End Class

Give it a try.

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How to add header and footer in iTextSharp

When you wish to display the page number and a title on every page, you need to make use of the PageEvents from the iTextSharp document settings. Create a class called: ITextEvents.cs with the following structure:

public class ITextEvents : PdfPageEventHelper
    {

        // This is the contentbyte object of the writer
        PdfContentByte cb;

        // we will put the final number of pages in a template
        PdfTemplate headerTemplate, footerTemplate;

        // this is the BaseFont we are going to use for the header / footer
        BaseFont bf = null;

        // This keeps track of the creation time
        DateTime PrintTime = DateTime.Now;


        #region Fields
        private string _header;
        #endregion

        #region Properties
        public string Header
        {
            get { return _header; }
            set { _header = value; }
        }
        #endregion


        public override void OnOpenDocument(PdfWriter writer, Document document)
        {
            try
            {
                PrintTime = DateTime.Now;
                bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
                cb = writer.DirectContent;
                headerTemplate = cb.CreateTemplate(100, 100);
                footerTemplate = cb.CreateTemplate(50, 50);
            }
            catch (DocumentException de)
            {

            }
            catch (System.IO.IOException ioe)
            {

            }
        }

        public override void OnEndPage(iTextSharp.text.pdf.PdfWriter writer, iTextSharp.text.Document document)
        {
            base.OnEndPage(writer, document);

            iTextSharp.text.Font baseFontNormal = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 12f, iTextSharp.text.Font.NORMAL, iTextSharp.text.BaseColor.BLACK);

            iTextSharp.text.Font baseFontBig = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 12f, iTextSharp.text.Font.BOLD, iTextSharp.text.BaseColor.BLACK);

            Phrase p1Header = new Phrase("Sample Header Here", baseFontNormal);

            //Create PdfTable object
            PdfPTable pdfTab = new PdfPTable(3);

            //We will have to create separate cells to include image logo and 2 separate strings
            //Row 1
            PdfPCell pdfCell1 = new PdfPCell();
            PdfPCell pdfCell2 = new PdfPCell(p1Header);
            PdfPCell pdfCell3 = new PdfPCell();
            String text = "Page " + writer.PageNumber + " of ";


            //Add paging to header
            {
                cb.BeginText();
                cb.SetFontAndSize(bf, 12);
                cb.SetTextMatrix(document.PageSize.GetRight(200), document.PageSize.GetTop(45));
                cb.ShowText(text);
                cb.EndText();
                float len = bf.GetWidthPoint(text, 12);
                //Adds "12" in Page 1 of 12
                cb.AddTemplate(headerTemplate, document.PageSize.GetRight(200) + len, document.PageSize.GetTop(45));
            }
            //Add paging to footer
            {
                cb.BeginText();
                cb.SetFontAndSize(bf, 12);
                cb.SetTextMatrix(document.PageSize.GetRight(180), document.PageSize.GetBottom(30));
                cb.ShowText(text);
                cb.EndText();
                float len = bf.GetWidthPoint(text, 12);
                cb.AddTemplate(footerTemplate, document.PageSize.GetRight(180) + len, document.PageSize.GetBottom(30));
            }
            //Row 2
            PdfPCell pdfCell4 = new PdfPCell(new Phrase("Sub Header Description", baseFontNormal));
            //Row 3


            PdfPCell pdfCell5 = new PdfPCell(new Phrase("Date:" + PrintTime.ToShortDateString(), baseFontBig));
            PdfPCell pdfCell6 = new PdfPCell();
            PdfPCell pdfCell7 = new PdfPCell(new Phrase("TIME:" + string.Format("{0:t}", DateTime.Now), baseFontBig));


            //set the alignment of all three cells and set border to 0
            pdfCell1.HorizontalAlignment = Element.ALIGN_CENTER;
            pdfCell2.HorizontalAlignment = Element.ALIGN_CENTER;
            pdfCell3.HorizontalAlignment = Element.ALIGN_CENTER;
            pdfCell4.HorizontalAlignment = Element.ALIGN_CENTER;
            pdfCell5.HorizontalAlignment = Element.ALIGN_CENTER;
            pdfCell6.HorizontalAlignment = Element.ALIGN_CENTER;
            pdfCell7.HorizontalAlignment = Element.ALIGN_CENTER;


            pdfCell2.VerticalAlignment = Element.ALIGN_BOTTOM;
            pdfCell3.VerticalAlignment = Element.ALIGN_MIDDLE;
            pdfCell4.VerticalAlignment = Element.ALIGN_TOP;
            pdfCell5.VerticalAlignment = Element.ALIGN_MIDDLE;
            pdfCell6.VerticalAlignment = Element.ALIGN_MIDDLE;
            pdfCell7.VerticalAlignment = Element.ALIGN_MIDDLE;


            pdfCell4.Colspan = 3;



            pdfCell1.Border = 0;
            pdfCell2.Border = 0;
            pdfCell3.Border = 0;
            pdfCell4.Border = 0;
            pdfCell5.Border = 0;
            pdfCell6.Border = 0;
            pdfCell7.Border = 0;


            //add all three cells into PdfTable
            pdfTab.AddCell(pdfCell1);
            pdfTab.AddCell(pdfCell2);
            pdfTab.AddCell(pdfCell3);
            pdfTab.AddCell(pdfCell4);
            pdfTab.AddCell(pdfCell5);
            pdfTab.AddCell(pdfCell6);
            pdfTab.AddCell(pdfCell7);

            pdfTab.TotalWidth = document.PageSize.Width - 80f;
            pdfTab.WidthPercentage = 70;
            //pdfTab.HorizontalAlignment = Element.ALIGN_CENTER;


            //call WriteSelectedRows of PdfTable. This writes rows from PdfWriter in PdfTable
            //first param is start row. -1 indicates there is no end row and all the rows to be included to write
            //Third and fourth param is x and y position to start writing
            pdfTab.WriteSelectedRows(0, -1, 40, document.PageSize.Height - 30, writer.DirectContent);
            //set pdfContent value

            //Move the pointer and draw line to separate header section from rest of page
            cb.MoveTo(40, document.PageSize.Height - 100);
            cb.LineTo(document.PageSize.Width - 40, document.PageSize.Height - 100);
            cb.Stroke();

            //Move the pointer and draw line to separate footer section from rest of page
            cb.MoveTo(40, document.PageSize.GetBottom(50) );
            cb.LineTo(document.PageSize.Width - 40, document.PageSize.GetBottom(50));
            cb.Stroke();
        }

        public override void OnCloseDocument(PdfWriter writer, Document document)
        {
            base.OnCloseDocument(writer, document);

            headerTemplate.BeginText();
            headerTemplate.SetFontAndSize(bf, 12);
            headerTemplate.SetTextMatrix(0, 0);
            headerTemplate.ShowText((writer.PageNumber - 1).ToString());
            headerTemplate.EndText();

            footerTemplate.BeginText();
            footerTemplate.SetFontAndSize(bf, 12);
            footerTemplate.SetTextMatrix(0, 0);
            footerTemplate.ShowText((writer.PageNumber - 1).ToString());
            footerTemplate.EndText();


        }
    }

The calling function looks like this:

private void CreatePDF()
        {
            string fileName = string.Empty;

            DateTime fileCreationDatetime = DateTime.Now;

            fileName = string.Format("{0}.pdf", fileCreationDatetime.ToString(@"yyyyMMdd") + "_" + fileCreationDatetime.ToString(@"HHmmss"));

            string pdfPath = Server.MapPath(@"~PDFs") +   fileName;

            using (FileStream msReport = new FileStream(pdfPath, FileMode.Create))
            {
                //step 1
                using (Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 140f, 10f))
                {
                    try
                    {
                        // step 2
                        PdfWriter pdfWriter = PdfWriter.GetInstance(pdfDoc, msReport);
                        pdfWriter.PageEvent = new Common.ITextEvents();

                        //open the stream
                        pdfDoc.Open();

                        for (int i = 0; i < 10; i++)
                        {
                            Paragraph para = new Paragraph("Hello world. Checking Header Footer", new Font(Font.FontFamily.HELVETICA, 22));

                            para.Alignment = Element.ALIGN_CENTER;

                            pdfDoc.Add(para);

                            pdfDoc.NewPage();
                        }

                        pdfDoc.Close();

                    }
                    catch (Exception ex)
                    {
                        //handle exception
                    }

                    finally
                    {


                    }

                }

            }
        }

Save images from PDF Files using iTextSharp

This code will allow you to go through a PDF Document and extract the images.

public void ExtractImagesFromPDF(string sourcePdf, string outputPath) {
  // NOTE: This will only get the first image it finds per page.
  PdfReader pdf = new PdfReader(sourcePdf);
  RandomAccessFileOrArray raf = new iTextSharp.text.pdf.RandomAccessFileOrArray(sourcePdf);

  try {
   for (int pageNumber = 1; pageNumber <= pdf.NumberOfPages; pageNumber++) {
    Response.Write("Page " + pageNumber.ToString());
    PdfDictionary pg = pdf.GetPageN(pageNumber);
    // recursively search pages, forms and groups for images.
    PdfObject obj = FindImageInPDFDictionary(pg);
    
    if (obj != null) {
     
     int XrefIndex = Convert.ToInt32(((PRIndirectReference) obj).Number.ToString(System.Globalization.CultureInfo.InvariantCulture));
     PdfObject pdfObj = pdf.GetPdfObject(XrefIndex);
     PdfStream pdfStrem = (PdfStream) pdfObj;
     byte[] bytes = PdfReader.GetStreamBytesRaw((PRStream) pdfStrem);
     
     if ((bytes != null)) {
         
      using(System.IO.MemoryStream memStream = new System.IO.MemoryStream(bytes)) {
       memStream.Position = 0;
       System.Drawing.Image img = System.Drawing.Image.FromStream(memStream);
       // must save the file while stream is open.
       if (!Directory.Exists(outputPath))
        Directory.CreateDirectory(outputPath);
       string path = Path.Combine(outputPath, String.Format(@ "{0}.jpg", pageNumber));
       System.Drawing.Imaging.EncoderParameters parms = new System.Drawing.Imaging.EncoderParameters(1);
       parms.Param[0] = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Compression, 0);
       ImageCodecInfo jpegEncoder = GetEncoder(ImageFormat.Jpeg);
       img.Save(path, jpegEncoder, parms);

      }

     }

    } else {
     Response.Write("
Page " + pageNumber.ToString() + " has no images!");
    }

   }
  } catch {
   throw;

  } finally {
   pdf.Close();
   raf.Close();

  }

 }
 // This method will allow you to detect an image in a PDF page
private PdfObject FindImageInPDFDictionary(PdfDictionary pg) {
 PdfDictionary res =
  (PdfDictionary) PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
 PdfDictionary xobj =
  (PdfDictionary) PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
 if (xobj != null) {
  foreach(PdfName name in xobj.Keys) {
   PdfObject obj = xobj.Get(name);
   if (obj.IsIndirect()) {
    PdfDictionary tg = (PdfDictionary) PdfReader.GetPdfObject(obj);
    PdfName type =
     (PdfName) PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));
    //image at the root of the pdf
    if (PdfName.IMAGE.Equals(type)) {
     return obj;

    } // image inside a form
    else if (PdfName.FORM.Equals(type)) {
     return FindImageInPDFDictionary(tg);

    } //image inside a group
    else if (PdfName.GROUP.Equals(type)) {
     return FindImageInPDFDictionary(tg);

    }
   }

  }

 }
 return null;

}

If you are using ImageCodecInfo

private ImageCodecInfo GetEncoder(ImageFormat format) {
 ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
 foreach(ImageCodecInfo codec in codecs) {
  if (codec.FormatID == format.Guid) {
   return codec;
  }
 }
 return null;
}

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How to add a multi-page TIFF to a PDF using iTextSharp (VB.NET)

If you are ever stuck with a multi-page tiff, you will know how frustrating it is to get the images out and then add them to a pdf. This code snippet below shows how it’s done and feel free to leave a comment if you have used it and it worked.

'check if image exists
                Dim fi As New FileInfo(strImagePath)
                If fi.Exists Then

                    'save image in document
                    Dim gif As Image = Image.GetInstance(fi.FullName)
                    Dim pageWidth = doc.PageSize.Width - (10 + 10)
                    Dim pageHeight = doc.PageSize.Height - (40 + 10)

                    If fi.Extension.ToLower.EndsWith("tif") Then
                        Dim bmp As New System.Drawing.Bitmap(fi.FullName)
                        Dim total As Integer = bmp.GetFrameCount(System.Drawing.Imaging.FrameDimension.Page)
                        If total > 1 Then
                            For k As Integer = 0 To total - 1
                                doc.NewPage()
                                bmp.SelectActiveFrame(System.Drawing.Imaging.FrameDimension.Page, k)
                                Dim img As iTextSharp.text.Image
                                img = iTextSharp.text.Image.GetInstance(bmp, System.Drawing.Imaging.ImageFormat.Bmp)
                                img.SetAbsolutePosition(10, 40)
                                img.ScaleToFit(pageWidth, pageHeight)
                                doc.Add(img)
                            Next
                        End If
                    Else
                        doc.NewPage()
                        gif.SetAbsolutePosition(10, 40)
                        gif.ScaleToFit(pageWidth, pageHeight)
                        doc.Add(gif)

                    End If
                End If
            End If

Splitting PDF pages programatically using ABCPdf 7

As a programmer, you are sometimes faced with the issue of taking one existing PDF and extracting a specific page from it to show to the user. We have been using ABCPDF7 for this which you can download from their website.

Website Link: http://www.websupergoo.com/abcpdf-1.htm

First, we import the dlls into the project reference:

Reference Include=”ABCpdf, Version=7.0.3.5, Culture=neutral, PublicKeyToken=a7a0b3f5184f2169, processorArchitecture=MSIL”>
<SpecificVersion>False</SpecificVersion>
<HintPath>…………..Program FilesWebSupergooABCpdf .NET 7.0ABCpdf.DLL</HintPath>
</Reference>

and the namespace at the top of the file. For this example I will be using VB.NET

Imports WebSupergoo.ABCpdf7
Imports WebSupergoo.ABCpdf7.Objects
Imports WebSupergoo.ABCpdf7.Atoms
Imports WebSupergoo.ABCpdf7.Operations

[…]
Declaring the source PDF and getting the number of pages:
Dim theSrc As Doc = New Doc()
theSrc.Read(Server.MapPath(“test.pdf”))
Dim theCount As Integer = theSrc.PageCount

Pages start their count from 1 which is different from the 0-based arrays in .NET. Now we go through the pages of the document and save each page as a separate PDF file

Dim i As Integer
For i = 1 To theCount
Dim theDst As Doc = New Doc()
theDst.MediaBox.String = theSrc.MediaBox.String

theDst.Rect.String = theDst.MediaBox.String
theDst.Rect.Inset(0, 0)
theDst.Rect.Position(0, 0)
Dim theX As Double, theY As Double
theX = theDst.MediaBox.Width / 2
theY = theDst.MediaBox.Height / 2

theDst.Page = theDst.AddPage()
theDst.FrameRect()
theDst.Save(Server.MapPath(“result” & CStr(i) & “.pdf”))
Next

The files will be saved in the local folder and will be result1, result2, etc..

If you only want one specific page, PageNumberWanted is the page number starting from 1 and less than the number of pages available (can be retrieved via the count method above). The code is:

Dim theDst As Doc = New Doc()

theDst.MediaBox.String = theSrc.MediaBox.String
theDst.Rect.String = theDst.MediaBox.String
theDst.Rect.Inset(0, 0)
theDst.Rect.Position(0, 0)

theDst.Page = theDst.AddPage()
theDst.AddImageDoc(theSrc, PageNumberWanted, Nothing)
theDst.FrameRect()

strPath = Server.MapPath(“ReportPageNumberWanted.pdf”)
theDst.Save(strPath)