Get information from a form

JAVA

/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
package com.itextpdf.samples.sandbox.acroforms;

import com.itextpdf.forms.PdfAcroForm;
import com.itextpdf.forms.fields.PdfFormCreator;
import com.itextpdf.forms.fields.PdfFormField;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;

import java.io.File;
import java.util.Map;

public class CheckBoxValues {
    public static final String DEST = "./target/sandbox/acroforms/check_box_values.pdf";

    public static final String SRC = "./src/main/resources/pdfs/checkboxExample.pdf";

    public static final String CHECKED_FIELD_NAME = "checked";
    public static final String UNCHECKED_FIELD_NAME = "unchecked";

    public static final String CHECKED_STATE_VALUE = "Yes";
    public static final String UNCHECKED_STATE_VALUE = "Off";


    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        file.getParentFile().mkdirs();

        new CheckBoxValues().manipulatePdf(DEST);
    }

    public void manipulatePdf(String dest) throws Exception {
        PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest));
        PdfAcroForm form = PdfFormCreator.getAcroForm(pdfDoc, true);
        Map<String, PdfFormField> fields = form.getAllFormFields();
        PdfFormField checkedField = fields.get(CHECKED_FIELD_NAME);
        PdfFormField uncheckedField = fields.get(UNCHECKED_FIELD_NAME);

        // Get array of possible values of the checkbox
        String[] states = checkedField.getAppearanceStates();

        // See all possible values in the console
        for (String state : states) {
            System.out.print(state + "; ");
        }

        // Search and set checked state to the previously unchecked checkbox and vice versa
        for (String state : states) {
            if (state.equals(CHECKED_STATE_VALUE)) {
                uncheckedField.setValue(state);
            } else if (state.equals(UNCHECKED_STATE_VALUE)) {
                checkedField.setValue(state);
            }
        }

        pdfDoc.close();
    }
}

C#

using System;
using System.Collections.Generic;
using System.IO;
using iText.Forms;
using iText.Forms.Fields;
using iText.Kernel.Pdf;

namespace iText.Samples.Sandbox.Acroforms
{
    public class CheckBoxValues
    {
        public static readonly String DEST = "results/sandbox/acroforms/check_box_values.pdf";

        public static readonly String SRC = "../../../resources/pdfs/checkboxExample.pdf";

        public static readonly String CHECKED_FIELD_NAME = "checked";
        public static readonly String UNCHECKED_FIELD_NAME = "unchecked";

        public static readonly String CHECKED_STATE_VALUE = "Yes";
        public static readonly String UNCHECKED_STATE_VALUE = "Off";

        public static void Main(String[] args)
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();

            new CheckBoxValues().ManipulatePdf(DEST);
        }

        public void ManipulatePdf(String dest)
        {
            PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest));
            PdfAcroForm form = PdfFormCreator.GetAcroForm(pdfDoc, true);
            IDictionary<String, PdfFormField> fields = form.GetAllFormFields();
            PdfFormField checkedField = fields[CHECKED_FIELD_NAME];
            PdfFormField uncheckedField = fields[UNCHECKED_FIELD_NAME];

            // Get array of possible values of the checkbox
            String[] states = checkedField.GetAppearanceStates();

            // See all possible values in the console
            foreach (String state in states)
            {
                Console.Write(state + "; ");
            }

            // Search and set checked state to the previously unchecked checkbox and vice versa
            foreach (String state in states)
            {
                if (state.Equals(CHECKED_STATE_VALUE))
                {
                    uncheckedField.SetValue(state);
                }
                else if (state.Equals(UNCHECKED_STATE_VALUE))
                {
                    checkedField.SetValue(state);
                }
            }

            pdfDoc.Close();
        }
    }
}