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• Introduction This article describes a quick and simple approach to programmatically completing a PDF document through the use of the iTextSharp DLL. The article also discusses how one might go about using the iTextSharp DLL to discover and map the fields available within an existing PDF if the programmer has only the PDF, but does not have Adobe Designer or even a list of the names of the fields present in the PDF. Figure 1: Resulting PDF after Filling in Fields Programmatically iTextSharp is a C# port of a Java library written to support the creation and manipulation of PDF documents. The project is. With the iTextSharp DLL, it is possible to not only populate fields in an existing PDF document, but also to dynamically create PDFs.
The examples here are limited to a description of the procedures associated with the completion of a PDF. The download will contain examples of PDF creation in both Visual Basic and C#. The examples contained herein are dependent upon the availability of the iTextSharp DLL. Use the link provided previously in order to download the DLL locally to your development machine. In order to demonstrate filling out a PDF using the iTextSharp DLL, I downloaded a copy of the W-4 PDF form from the IRS website. Download Do Ares 2013 there.
The form contains controls and may be filled out programmatically, so it serves as a good example. PDF documents that do not contain controls, i.e. Those meant to be printed and filled in with a pencil, cannot be completed using this approach. Of course, if you have access to Adobe tools (Adobe Professional, Adobe Designer), you can always create your own PDFs with controls or can add controls to existing PDFs. Further, although not demonstrated here, you can also use iTextSharp to create a PDF document with embedded controls. Getting Started In order to get started, fire up the Visual Studio 2005 IDE and open the attached solution.
The solution consists of a single Windows Forms project with a single form. I have also included a PDF that will be used for demonstration purposes; this form is the IRS W-4 form completed by US taxpayers.
However, any PDF with embedded controls (text boxes, check boxes, etc.) is fair game for this approach. Note that a reference to the iTextSharp DLL has been included in the project. All of the project code is contained within the single Windows Form. Facebook Password Hack V1.3. The form itself contains only a docked textbox used to display all of the field names from an existing PDF document. The completed PDF is generated and stored in the local file system; the PDF is not opened for display by the application. The application uses the existing PDF as a template and from that template, it creates and populates the new PDF.
The template PDF itself is never populated and it is used only to define the format and contents of the completed PDF. Figure 2: Solution Explorer The Code: Main Form As was previously mentioned, all of the code used in the demonstration application is contained entirely in the project’s single Windows Form. The following section will describe the contents of the code file. The file begins with the appropriate library imports needed to support the code. Note that the iTextSharp libraries have been included into the project. The class declaration is in the default configuration.
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