Enhance PDFs with Multi-Line Text Boxes

The Syncfusion Essential^® PDF offers a high-performance .NET PDF library that allows you to create, read, and edit PDF documents efficiently. This guide demonstrates how to add a multi-line text box using the PdfTextBoxField in a PDF document

Steps to add a multiline text box in PDF document

1. Create a Console Application: Set up a new console application project.
   
   
2. Install Syncfusion^® Package: Add the Syncfusion.Pdf.Net.Core NuGet package to your console application.
   
   
3. Include Required Namespaces: Add the following namespaces in Program.cs.

C#

using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Drawing;
using System.IO;

4. Implement Multi-Line Text Box: Use the following code to create a multi-line text box in your PDF document

C#

// Create a new PDF document
PdfDocument document = new PdfDocument();
// Creates a new page and adds it to the document
PdfPage page = document.Pages.Add();
// Create a standard font to be used in the text field
PdfFont font = new PdfStandardFont(PdfFontFamily.Courier, 12f);
// Create a text box field and add it to the page with a name
PdfTextBoxField textBoxField = new PdfTextBoxField(page, "FirstName");
// Set the bounds (position and size) of the text box field
textBoxField.Bounds = new RectangleF(0, 0, 200, 50);
// Enable multiline functionality for the text box (allows multiple lines of text)
textBoxField.Multiline = true;
// Set the initial text inside the text box field
textBoxField.Text = "Essential PDF allows you to create and manage the form (AcroForm) in PDF document by using PdfForm class. The PdfFormFieldCollection class represents the entire field collection of the form.";
// Add the text box field to the form field collection in the document
document.Form.Fields.Add(textBoxField);
// Create a FileStream to save the document
using (FileStream stream = new FileStream("Output.pdf", FileMode.Create, FileAccess.Write))
{
 // Save the PDF document to the file stream
 document.Save(stream);
}
// Close the document
document.Close(true);

A complete working sample can be downloaded from GitHub.

By executing the program, the output PDF document will be generated as shown below:

Take a moment to peruse the documentation to learn how to add form fields in a PDF document.

Conclusion
I hope you enjoyed learning how to add a multi-line text box field to a PDF document.

You can refer to our ASP.NET Core PDF feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our ASP.NET Core PDF example to understand how to create and manipulate data.

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