PDF: Remove field from PDF interactive form

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The form field can be removed using PdfDocumentInteractiveForm.RemoveField method in case the full name of field is known. The method removes the field, its child fields and all fields annotations.
Also the field can be removed using PdfInteractiveFormField.Remove method. The method removes the field, its child fields and all fields annotations.

Here is C#/VB.NET code that demonstrates how to remove field using field name from PDF interactive form:

/// <summary>
/// Removes an interactive field from interactive form of PDF document.
/// </summary>
/// <param name="pdfFilename">The filename of PDF document.</param>
/// <param name="fullyQualifiedFieldName">The name of field.</param>
public static void RemoveFieldFromPdfInteractiveForm(string pdfFilename, string fullyQualifiedFieldName)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document =
        new Vintasoft.Imaging.Pdf.PdfDocument(pdfFilename))
    {
        // if PDF document has interactive form
        if (document.InteractiveForm != null)
        {
            // get reference to the interactive form
            Vintasoft.Imaging.Pdf.Tree.InteractiveForms.PdfDocumentInteractiveForm form = document.InteractiveForm;

            // remove field from interactive form
            form.RemoveField(fullyQualifiedFieldName);

            // save changes to a file
            document.SaveChanges();
        }
    }
}

VB.NET

''' <summary>
''' Removes an interactive field from interactive form of PDF document.
''' </summary>
''' <param name="pdfFilename">The filename of PDF document.</param>
''' <param name="fullyQualifiedFieldName">The name of field.</param>
Public Shared Sub RemoveFieldFromPdfInteractiveForm(pdfFilename As String, fullyQualifiedFieldName As String)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFilename)
        ' if PDF document has interactive form
        If document.InteractiveForm IsNot Nothing Then
            ' get reference to the interactive form
            Dim form As Vintasoft.Imaging.Pdf.Tree.InteractiveForms.PdfDocumentInteractiveForm = document.InteractiveForm

            ' remove field from interactive form
            form.RemoveField(fullyQualifiedFieldName)

            ' save changes to a file
            document.SaveChanges()
        End If
    End Using
End Sub

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