- How to add page numbers to your PDF
- Add text field to PDF
- Append multiple PDF documents
- Bulleted list from XML and XSL
- Merge PDF
- Calculate the height of a paragraph in PDF
- Multipage TIFF to PDF
- Convert TXT to PDF
- Convert XHTML to PDF
- Create PDF in C# - Tall Components - Check out our PDF code samples
- Text formatting
- Generate PDF form from XML
- XhtmlParagraph and TrueType fonts
- Add footer with left and right aligned text on same line
- Read and write meta data from PDF
- Stitch PDF documents
- Use multiple licenses
- What is the resulting fontsize in PDF rich text used in SimpleXhtmlShape
Multipage TIFF to PDF
This article shows you how to convert a multipage TIFF to PDF using TallPDF.NET.
Step 1: Get the number of frames
// count the number of TIFF frames/pages
string path = "in.tif";
ImageShape image = new ImageShape(path);
int count = image.FrameCount;
' count the number of TIFF frames/pages
Dim path As String = "in.tif"
Dim image As ImageShape = New ImageShape(path)
Dim count As Integer = image.FrameCount
Step 2: Add a section and image paragraph per frame
For each frame we add a section that has a page size that equals the size of the frame. The page margins are zero. To each section, add a single image paragraph that spans the entire page.
Document document = new Document();
// for each frame add a section
for (int index = 0; index < count; index++)
{
// create a section and add it to the document.
Section section = document.Sections.Add();
section.StartOnNewPage = true;
// set margins to zero; the image will span the entire page
section.Margin.Left = 0;
section.Margin.Right = 0;
section.Margin.Top = 0;
section.Margin.Bottom = 0;
// load the frame into an Image paragraph
Image frame = new Image(path, index);
// set PageSize from the Image dimensions
section.PageSize.Width = frame.Width;
section.PageSize.Height = frame.Height;
// add the image to the section
section.Paragraphs.Add( frame );
}
Dim document As New Document()
' for each frame add a section
For index = 0 To count - 1
' create a section and add it to the document.
Dim section As Section = document.Sections.Add()
section.StartOnNewPage = True
' set margins to zero; the image will span the entire page
section.Margin.Left = 0
section.Margin.Right = 0
section.Margin.Top = 0
section.Margin.Bottom = 0
' load the frame into an Image paragraph
Dim frame As New Image(path, index)
' set PageSize from the Image dimensions
section.PageSize.Width = frame.Width
section.PageSize.Height = frame.Height
' add the image to the section
section.Paragraphs.Add(frame)
Next
Step 3: Save the PDF document
// save the PDF to a file
using (FileStream file = new FileStream(
"out.pdf", FileMode.Create, FileAccess.Write))
{
document.Write(file);
}
' save the PDF to a file
Using file = New FileStream( _
"out.pdf", FileMode.Create, FileAccess.Write)
document.Write(file)
End Using
Performance considerations
In this article we have used images based on files because TallPDF.NET is optimized to work with files and streams. Older versions used System.Drawing.Bitmap internally. While quite flexible, GDI+ also introduces performance and quality issues. GDI+ uses a lot of resources to hold entire bitmaps in memory, often uncompressed (!). In addition to this, GDI+ converts image data to whatever format is best suited for on-screen display, meaning that the actual color values in the image may change (!). Using files and streams allows efficient seeking and caching which results in better performance. In addition to this, the image processing is specificaly designed to not modify the image data itself. So whenever possible, construct images from files or streams and avoid System.Drawing.Bitmap.