Add PDF form submission actions in C++

Add a submit button or configure an explicit SubmitFormAction in a PDF using Aspose.PDF for C++.

Add a submit button with FormEditor

The localhost URL is a sample submission target. Creating the PDF does not send the form; submission depends on activation in a supporting PDF viewer and an available endpoint.

1. Create FormEditor with the input and output paths.
2. Call AddSubmitBtn() with the button name, page 1, caption, target URL, and rectangle.
3. Save the edited PDF.

#include <Aspose.PDF.Cpp/Facades/FormEditor.h>

using namespace System;
using namespace Aspose::Pdf;
using Aspose::Pdf::Facades::FormEditor;
void FormExamples::AddSubmitButton(String inputFile, String outputFile)
{
    auto editor = MakeObject<FormEditor>(inputFile, outputFile);
    editor->AddSubmitBtn(String(u"submitbutton"), 1, String(u"Submit"),
        String(u"http://localhost/testing/show"), 100, 450, 150, 475);
    editor->Save();
}

Attach a submit action to a button

The example retains http://localhost:3000/submit as a local sample endpoint. Adapt it to the receiving application; the snippet does not start a server or perform a submission.

1. Open the input PDF as a Document.
2. Create a SubmitFormAction and set its URL through FileSpecification.
3. Set the ExportFormat and SubmitCoordinates flags.
4. Create a ButtonField on page 1, set its name and caption, and assign OnActivated.
5. Add the button to Aspose::Pdf::Forms::Form on page 1.
6. Save the PDF with Save().

#include <Aspose.PDF.Cpp/InteractiveFeatures/Forms/RadioButtonField.h>
#include <Aspose.PDF.Cpp/InteractiveFeatures/Forms/ButtonField.h>
#include <Aspose.PDF.Cpp/InteractiveFeatures/SubmitFormAction.h>
#include <Aspose.PDF.Cpp/Document.h>
#include <Aspose.PDF.Cpp/FileSpecification.h>

#include <Aspose.PDF.Cpp/Page.h>
#include <Aspose.PDF.Cpp/PageCollection.h>
#include <Aspose.PDF.Cpp/Rectangle.h>

using namespace System;
using namespace Aspose::Pdf;
using namespace Aspose::Pdf::Annotations;
using namespace Aspose::Pdf::Forms;


void FormExamples::AddSubmitAction(String inputFile, String outputFile)
{

    auto document = MakeObject<Document>(inputFile);
    auto submitAction = MakeObject<SubmitFormAction>();
    submitAction->set_Url(MakeObject<FileSpecification>(String(u"http://localhost:3000/submit")));
    submitAction->set_Flags(SubmitFormAction::ExportFormat | SubmitFormAction::SubmitCoordinates);

    auto submitButton = MakeObject<ButtonField>(document->get_Pages()->idx_get(1),
        MakeObject<Aspose::Pdf::Rectangle>(10, 10, 100, 40));
    submitButton->set_PartialName(String(u"SubmitButton"));
    submitButton->set_Value(String(u"Submit"));
    submitButton->set_OnActivated(submitAction);

    document->get_Form()->Add(submitButton, 1);
    document->Save(outputFile);
}