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Fill PDF forms using XFDF in C# .NET

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An XML Forms Data Format (XFDF) file stores data from forms located in PDF documents. It contains the values of the form fields and can also contain annotations.

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To import the form data from a file, use the ImportXFDFDataFromFile method with the following required parameters:

  • FilePath — The file path of the XFDF file.
  • ImportFormFields — A Boolean value that specifies whether to import the form field data.
  • ImportAnnotations — A Boolean value that specifies whether to import the annotation data.

The example below imports form field values into a PDF form from an XFDF file:

Register the SDK license before running SDK operations. For setup details, refer to the getting started with .NET SDK guide.

using GdPicture14;


LicenseManager license = new LicenseManager();
license.RegisterKEY("");
using GdPicturePDF gdpicturePDF = new GdPicturePDF();
gdpicturePDF.LoadFromFile(@"input_forms.pdf");
gdpicturePDF.ImportXFDFDataFromFile(@"input_forms.xfdf", true, true);
gdpicturePDF.SaveToFile(@"output.pdf");
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