Fill AcroForm - Fill PDF Form using C#

The following code snippet also work with Aspose.PDF.Drawing library.

Fill Form Field in a PDF Document

To fill a form field, get the field from the Document object’s Form collection. then set the field value using the field’s Value property.

This example selects a TextBoxField and sets its value using the Value property.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void FillFormField()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Forms();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "FillFormField.pdf"))
    {
        // Get a field
        if (document.Form["textbox1"] is Aspose.Pdf.Forms.TextBoxField textBoxField)
        {
            // Modify field value
            textBoxField.Value = "Value to be filled in the field";
        }

        // Save PDF document
        document.Save(dataDir + "FillFormField_out.pdf");
    }
}