Add Formfields with Javascript for field value validation to PDF in C# (.NET Core)

Adding Formfields with Javascript for field value validation to PDF using DynamicPDF Generator is simple and easy.

How to add Formfields with Javascript for field value validation to PDF in C#

Below are the steps and sample code to add a Formfields with Javascript for field value validation to PDF document using the Generator product. These actions can be used to perform tasks in many places such as in outlines, links, buttons or in any Document, Page or Form Field Reader Events.

Steps for Adding Formfields with Javascript for field value validation to a PDF Document

  1. Create a Document object.
  2. Create a Page object and add it to the Document.
  3. Create a TextField object and assign javascript to validate input, for OnBlue event using the JavaScriptAction object.
  4. Add all the Formfields to the Page.
  5. Save the PDF document.

Sample Code - C#

Document document = new Document();
Page page = new Page();
document.Pages.Add( page );

Label label = new Label("Please Enter a Number :", 0, 50, 150, 30);
ceTe.DynamicPDF.PageElements.Forms.TextField textField = new ceTe.DynamicPDF.PageElements.Forms.TextField("txt", 170, 30, 150, 30);
textField.DefaultValue = "0";
textField.ToolTip = "Enter only Numbers";
textField.ReaderEvents.OnBlur = new JavaScriptAction(" var no = this.getField(\"txt\").value; if( isNaN(no)) { app.alert(\"Please Enter number in the text field\"); } ");
page.Elements.Add(textField);
page.Elements.Add(label);

document.Pages.Add(page);
document.Draw( "output.pdf" );

Over 75 Page Elements

DynamicPDF Generator contains over 75 page elements so you can add rich content to the PDFs you create:

  • Images
  • Text Objects (TextArea and Label)
  • HTML
  • Barcodes (47 types)
  • Form Fields
  • Charts

Getting Started

NuGet Package

DynamicPDF Generator is available on NuGet and is part of the ceTe.DynamicPDF.CoreSuite.NET package. The Core Suite package includes Generator, Merger and ReportWriter.

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NuGet Package ID: ceTe.DynamicPDF.CoreSuite.NET

Example Project

An example project showing this functionality can be cloned or viewed from GitHub:

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Clone or View Example Project on GitHub

DynamicPDF Generator Information

More information can be found here:

Available in other platforms

DynamicPDF Generator is available for the following platforms. Refer to the respective product pages for more details.

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