PDF: Получение информации о полях интерактивной PDF формы

В этом разделе

Список всех полей интерактивной PDF формы можно получить с помощью свойства PdfDocumentInteractiveForm.Fields.

Поле формы интерактивной PDF формы можно найти по полному имени поля с помощью метода PdfDocumentInteractiveForm.FindField.

Все конечные поля PDF интерактивной формы можно получить с помощью метода PdfDocumentInteractiveForm.GetTerminalFields. Все поля с цифровой подписью можно получить с помощью метода PdfDocumentInteractiveForm.GetSignatureFields.

Вот C#/VB.NET код, который демонстрирует, как вывести информацию обо всех полях интерактивной PDF формы:

/// <summary>
/// Prints information about interactive form of PDF document.
/// </summary>
/// <param name="pdfFilename">The filename of PDF document.</param>
public static void PrintInformationAboutPdfInteractiveForm(string pdfFilename)
{
    // 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;

            // get an array that contains all interactive form fields of PDF document
            Vintasoft.Imaging.Pdf.Tree.InteractiveForms.PdfInteractiveFormField[] formFields = form.GetTerminalFields();

            // print information abount field count
            System.Console.WriteLine("Interactive Form Field Count: {0}", formFields.Length);

            // for each interactive field
            foreach (Vintasoft.Imaging.Pdf.Tree.InteractiveForms.PdfInteractiveFormField field in formFields)
            {
                // output information about interactive field
                System.Console.WriteLine("\tName={0,-18} TypeName={1,-33} TextQuadding={2,-14} IsReadOnly={3,-5}",
                    field.FullyQualifiedName, field.GetType().Name, field.TextQuadding, field.IsReadOnly);
            }
        }
    }
}

/* This code example produces the following output:
Interactive Form Field Count: 13
    Name=TextField1         TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=False
    Name=TextField2         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
    Name=TextField3         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
    Name=TextField4         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
    Name=TextField5         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
    Name=TextField6         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
    Name=NumericField       TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
    Name=FileSelect         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
    Name=browseButton       TypeName=PdfInteractiveFormPushButtonField TextQuadding=LeftJustified  IsReadOnly=False
    Name=Calculator.Left    TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=False
    Name=Calculator.Right   TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=False
    Name=Calculator.Result  TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=True
    Name=ResetButton        TypeName=PdfInteractiveFormPushButtonField TextQuadding=LeftJustified  IsReadOnly=False
*/

VB.NET

        ''' <summary>
        ''' Prints information about interactive form of PDF document.
        ''' </summary>
        ''' <param name="pdfFilename">The filename of PDF document.</param>
        Public Shared Sub PrintInformationAboutPdfInteractiveForm(pdfFilename 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

                    ' get an array that contains all interactive form fields of PDF document
                    Dim formFields As Vintasoft.Imaging.Pdf.Tree.InteractiveForms.PdfInteractiveFormField() = form.GetTerminalFields()

                    ' print information abount field count
                    System.Console.WriteLine("Interactive Form Field Count: {0}", formFields.Length)

                    ' for each interactive field
                    For Each field As Vintasoft.Imaging.Pdf.Tree.InteractiveForms.PdfInteractiveFormField In formFields
                        ' output information about interactive field
                        System.Console.WriteLine(vbTab & "Name={0,-18} TypeName={1,-33} TextQuadding={2,-14} IsReadOnly={3,-5}", field.FullyQualifiedName, field.[GetType]().Name, field.TextQuadding, field.IsReadOnly)
                    Next
                End If
            End Using
        End Sub

        ' This code example produces the following output:
'        Interactive Form Field Count: 13
'            Name=TextField1         TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=False
'            Name=TextField2         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
'            Name=TextField3         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
'            Name=TextField4         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
'            Name=TextField5         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
'            Name=TextField6         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
'            Name=NumericField       TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
'            Name=FileSelect         TypeName=PdfInteractiveFormTextField       TextQuadding=LeftJustified  IsReadOnly=False
'            Name=browseButton       TypeName=PdfInteractiveFormPushButtonField TextQuadding=LeftJustified  IsReadOnly=False
'            Name=Calculator.Left    TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=False
'            Name=Calculator.Right   TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=False
'            Name=Calculator.Result  TypeName=PdfInteractiveFormTextField       TextQuadding=Centered       IsReadOnly=True
'            Name=ResetButton        TypeName=PdfInteractiveFormPushButtonField TextQuadding=LeftJustified  IsReadOnly=False
'

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