We’re pleased to announce the release of Spire.PDF 12.10.7. This version introduces a new namespace for comprehensive PDF form processing, providing APIs for creating, reading, modifying, and flattening form fields. It also extends support to XFA forms and enables form data import and export in XML, FDF, and XFDF formats. These enhancements provide developers with more flexible and efficient ways to work with interactive PDF forms.

Here is a list of changes made in this release

1. Added the Spire.Pdf.Interactive.Forms namespace

The new Spire.Pdf.Interactive.Forms namespace provides a unified and comprehensive API for creating, reading, modifying, and flattening PDF form fields. It covers the common AcroForm field types, with the following key properties and methods.

Supported AcroForm Field Types

In addition to the field-specific members listed above, all fields inherit common properties from PdfField, including:

• IsReadOnly: Specifies whether the field is read-only.
• IsRequired: Specifies whether the field is required.
• AlternateName: Gets or sets the alternate name of the field.
• MappingName: Gets or sets the mapping name of the field.
• DefaultAppearance: Gets or sets the default appearance of the field.

All fields can also call Flatten() to flatten the form field into static page content.

2. Extended Support for XFA Forms

This version also introduces access to XFA forms through the Spire.Pdf.Interactive.Forms.Xfa sub-namespace. Developers can retrieve XFA form field names and objects, inspect field values, and work with a variety of XFA field types.

Supported AcroForm Field Types

All XFA fields inherit common properties from XfaField, including:

• Name: The field name.
• XfaForm: The containing XFA form.
• FieldType: The field type identifier.

The XfaSignatureField (signature) and XfaPushButtonField (push button) classes do not define additional public properties and are accessed primarily through their inherited common members.

3. Added Form Data Import and Export

PdfForm now supports importing and exporting form data in XML, FDF, and XFDF formats. This functionality facilitates form data exchange between PDF documents, business systems, and third-party PDF tools.

Code example:

using System.Drawing;
  using System.Collections.Generic;
  using Spire.Pdf;
  using Spire.Pdf.Graphics;
  using Spire.Pdf.Interactive.Forms;

  PdfDocument doc = new PdfDocument();
  PdfPageBase page = doc.Pages.Add();

  // Get the form container via PdfForm.Create() under the new namespace
  PdfForm form = PdfForm.Create(doc);

  // Create a text field and add it to the page
  PdfTextField nameField = new PdfTextField(form, "Address.Street");
  nameField.DefaultAppearance = new PdfDefaultAppearance(
      new PdfFont(PdfFontFamily.Helvetica, 12), new PdfRGBColor(0, 0, 0));
  nameField.AddWidget(page, new RectangleF(100, 100, 250, 30));
  nameField.Value = "123 Main St";

  // Retrieve fields by name and by prefix
  PdfField field = form.GetField("Address.Street");
  List<PdfField> addressFields = form.Fields.FindByPrefix("Address");

  // Flatten to static content and save
  form.Flatten();
  doc.SaveToFile("output.pdf");

  Form data can also be exchanged directly in formats such as XFDF:
  // Export form data as XFDF and import it back from the file
  form.ExportData("form.xfdf", DataFormat.XFDF, "PurchaseOrder");
  form.ImportData("form.xfdf", DataFormat.XFDF);