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Gios PDF .NET library

, 18 Apr 2005 LGPL3
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A .NET library for generating impressive PDF reports.


This article describes how to use the Gios Pdf.NET open source library, a complete object-oriented .NET library for generating impressive reports with few lines of code.


I started writing this library because I really couldn’t find a good C# library for exporting my reports. When you open a PDF document with Notepad to find out if it’s possible to edit it… well… you change your mind!

...But if you download the PDF format specifications from Adobe’s official site… you can demystify everything!

In this article, it’s not my intention to teach “how to write a clone of my library” but “how to use it” … By the way, if you want to try to write your own library… try it: it’s not impossible and it's a good (and difficult!) exercise!

Using the code

Start instantiating the document with a new PdfDocument object. Remember to set the document format. In this case we specify width and height in centimeters. Document format is provided by the PdfDocumentFormat class:

PdfDocument myPdfDocument = 
  new PdfDocument(PdfDocumentFormat.InCentimeters(21,29.7));

Now we create a table of 100 lines, 6 columns and 4 points of padding:

PdfTable myPdfTable = 
  myPdfDocument.NewTable(new Font("Verdana",12),200,6,4);

Importing data from the datatables... (also column names for the headers!):


Set the format for correct date-time representation:


Now we set our Graphic Design: Colors and Borders...


With just one method, we can set the proportional width of the columns. It's a "percentage like" assignment, but the sum can be different from 100.

myPdfTable.SetColumnsWidth(new int[]{5,25,16,20,20,15});

You can also set colors for a range of cells, in this case, a row:


Now we set some alignment... for the whole table and then, for a column:


This is the most important feature of the library: each page generated by the table can be managed in all the details:

while (!myPdfTable.AllTablePagesCreated)
    // we create a new page to put the generation of the new TablePage:

    PdfPage newPdfPage=myPdfDocument.NewPage();
    PdfTablePage newPdfTablePage = 
      myPdfTable.CreateTablePage(new PdfArea(myPdfDocument,48,120,500,670));

    // we also put a Label 
    PdfTextArea pta=new PdfTextArea(new Font("Verdana",26, FontStyle.Bold), 
      Color.Red, new PdfArea(myPdfDocument,0,20,595,120), 
      ContentAlignment.MiddleCenter,"Contact List");

    // nice thing: we can put all the objects
    // in the following lines, so we can have
    // a great control of layer sequence... 


    // Now we create a loop for serching for people born in 1968. If we find
    // one, we will draw a circle over
    // the birthday cell. This is possible using the
    // the CellArea, that is the Area occupied by a rasterized Cell.
    for (int index=newPdfTablePage.FirstRow;index<=newPdfTablePage.LastRow;index++)
       if (((DateTime)myPdfTable.Rows[index][2].Content).Year==1968)
          PdfCircle pc=newPdfTablePage.CellArea(index,2).InnerCircle(Color.Blue,2);

    // we save each generated page before start rendering the next.


At last... remember to save the document!


And this is the result:

Remember, you can also output the PDF to a generic Stream. These are the lines for a Web Response:



  • April 18, 2005 - Initial release.


This article, along with any associated source code and files, is licensed under The GNU Lesser General Public License (LGPLv3)


About the Author

Paolo Gios
Web Developer
Italy Italy
Freelance software ASPNET / C# Software Developer

I live in Torino, Italy

my homepage is:

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Comments and Discussions

QuestionGood work Pin
ottilia7-May-15 10:03
memberottilia7-May-15 10:03 
QuestionPDF files not opening in the Windows 8 Metro PDF reader Pin
tanioskahi11-Oct-13 4:37
membertanioskahi11-Oct-13 4:37 
AnswerRe: PDF files not opening in the Windows 8 Metro PDF reader Pin
infal2-Dec-13 5:36
memberinfal2-Dec-13 5:36 
GeneralRe: PDF files not opening in the Windows 8 Metro PDF reader Pin
infal2-Dec-13 5:40
memberinfal2-Dec-13 5:40 
QuestionCan u Extend this to Read pdf Pin
pra2717-Jul-13 0:13
memberpra2717-Jul-13 0:13 
QuestionGios Pdf.NET.dll Pin
Strygor4-Sep-12 9:22
memberStrygor4-Sep-12 9:22 
QuestionGios-PDF-NET-library Pin
Member 879443230-Jul-12 2:16
memberMember 879443230-Jul-12 2:16 
QuestionFont Support Pin
N Haque24-Jul-12 21:50
memberN Haque24-Jul-12 21:50 
QuestionSearch Document Pin
jibrownie1-Jul-12 9:03
memberjibrownie1-Jul-12 9:03 
QuestionWrong char after converting Pdf Pin
N Haque23-May-12 0:15
memberN Haque23-May-12 0:15 
GeneralMy vote of 5 Pin
manoj kumar choubey9-Feb-12 3:24
membermanoj kumar choubey9-Feb-12 3:24 
QuestionAdd images in the pdf table Pin
galvin verghese13-Oct-11 2:01
membergalvin verghese13-Oct-11 2:01 
BugSend("startxref\n" + startxref+"\n"); [modified] Pin
infal18-Sep-11 13:29
memberinfal18-Sep-11 13:29 
QuestionWhere is V2.0? Pin
infal16-Sep-11 2:35
memberinfal16-Sep-11 2:35 
SuggestionActualize and permanently update the code. Pin
infal15-Sep-11 2:26
memberinfal15-Sep-11 2:26 
GeneralPage Numbers Pin
JayveeJavier10-Feb-11 17:20
memberJayveeJavier10-Feb-11 17:20 
GeneralRe: Page Numbers Pin
galvin verghese13-Oct-11 2:07
membergalvin verghese13-Oct-11 2:07 
QuestionCan I use this in web pages Pin
arpan31-Oct-10 22:20
memberarpan31-Oct-10 22:20 
AnswerRe: Can I use this in web pages Pin
galvin verghese3-Sep-11 0:26
membergalvin verghese3-Sep-11 0:26 
AnswerRe: Can I use this in web pages Pin
galvin verghese4-Sep-11 23:26
membergalvin verghese4-Sep-11 23:26 
GeneralMy vote of 3 Pin
scefiro8-Aug-10 18:42
memberscefiro8-Aug-10 18:42 
GeneralRe: My vote of 3 Pin
hazk7-Sep-10 9:56
memberhazk7-Sep-10 9:56 
GeneralRe: My vote of 3 Pin
galvin verghese13-Oct-11 2:15
membergalvin verghese13-Oct-11 2:15 
QuestionArabic Text support Pin
manmadhan12313-Jun-10 0:53
membermanmadhan12313-Jun-10 0:53 
GeneralRe: Arabic Text support Pin
lalaleah131-Oct-15 2:28
memberlalaleah131-Oct-15 2:28 

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