Click here to Skip to main content
Click here to Skip to main content

PDF file creation using the ItextSharp library with ASP.NET

, 31 Mar 2009
Rate this:
Please Sign up or sign in to vote.
PDF file creation using the ItextSharp library with ASP.NET and C#, and deleting the file from the server after displaying it.

Introduction

Today I am going to explain how to create a PDF file on a server using ASP.NET and how to delete it from the server.

I was trying to create a PDF file with help of ItextSharp, which was relatively easy task. After creation, I wanted to load this file on the web browser for the user. Once loaded, I wanted to delete the file from the server. I searched on the web regarding this topic, but found almost nothing of help. After a lot of thinking, I came up with this solution. If you have a better solution, please share it with me.

Background

The primary requirements for this application are a PDF file template, a data source (data that will go inside the PDF file), and the ItextSharp library. Download ItextSharp from SourceForge.net. I would like to thank the authors of ItextSharp for creating such a nice library which makes PDF creation a piece of cake.

Please read this article for understanding how to create a PDF file.

Using the code

I will explain how to load the PDF file into a web browser from a server directory once the PDF file is created, we will also see how to delete the file once it is displayed.

Step 1: Create a directory on the server, for example "/pdfFactory/". Use this folder as the output path from the PDF file creation method.

Step 2: Once the file is created, construct a thread:

protected void Page_Load(object sender, EventArgs e){
    .
    .
    .

    string filePath = Server.MapPath("/pdfFactory/")+"/pdfFile.pdf"; 
    if (File.Exist(filePath)){
        Thread t = new Thread( deleteMe); 

        t.Start(filePath); 

        Response.Redirect("/pdfFactory/pdfFile.pdf"); 
    }
    .
    .
    .
}

static void deleteMe(object fileObject){
    string filePath = (string) fileObject; 
    Thread.Sleep(5000); 
    if(File.Exist(filePath)){
    File.Delete(filePath); 
    }
}

Explanation

Once the PDF file is created inside the "pdfFactory" folder, it can be loaded directly to the browser with a relative URL. The Response.Redirect method uses this path to load the newly created PDF file into the web browser. Once the file is redirected with the above method, server side control is lost. So, we need another event to delete the file from the client browser. But, it requires another server call from the client. To overcome this problem, we are using a Thread.

The created thread "t" calls the deleteMe method. This method takes a filePath parameter. Once started, it sleeps until the file is loaded to the client machine. After 5000 milliseconds, the server deletes this file with the File object.

If the client wishes to save this file, the client can save it on their local machine. This way, the server is not loaded with a lot of files.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Abhay Mhatre
Software Developer CSU Office of Chancellor
United States United States
No Biography provided

Comments and Discussions

 
GeneralMy vote of 1 PinmemberRui Holdorf6-Apr-09 13:25 
GeneralRe: My vote of 1 PinmemberAbhay Mhatre7-Apr-09 8:06 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web01 | 2.8.140709.1 | Last Updated 31 Mar 2009
Article Copyright 2009 by Abhay Mhatre
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid