使用 iTextSharp 添加一个复选框

Question

我正在尝试使用适用于 C# 的 iTextSharp 库仅添加一个复选框。我遵循了一些示例并尝试修改它们，因为它们展示了如何创建一组复选框。如何只创建一个？

private static void WriteFooter(Document doc, int page, int maxPages, bool lastPage, PdfWriter writer, PdfAppearance[] checkBoxAppearance)
    {
        if(!lastPage)
        {
            doc.Add(new Paragraph("\nMA-2028.1-F2(Portrait) Page " + page + " of " + maxPages, Fonts.ExtraSmall));
            doc.NewPage();
        } else
        {
            PdfContentByte cb = writer.DirectContent;
            PdfFormField _checkGroup = PdfFormField.CreateRadioButton(writer, true);
            RadioCheckField _radioG;
            PdfFormField _radioField1;
            _radioG = new RadioCheckField(writer, new Rectangle(20, 20), null, "Yes");
            _radioG.CheckType = RadioCheckField.TYPE_CHECK;
            _radioField1 = _radioG.RadioField;
            _checkGroup.AddKid(_radioField1);
            ColumnText.ShowTextAligned(cb, Element.ALIGN_RIGHT, new Phrase("No Users Require Deletion"), 20, 20, 0);
            writer.AddAnnotation(_checkGroup);
            cb = writer.DirectContent;
            doc.Add(
                new Paragraph(
                    "Operations Management:\n\n", Fonts.Small) { Alignment = Element.ALIGN_CENTER });
            doc.Add(
                new Paragraph(
                    "Automation Manager or Designee: \n\n", Fonts.Small) { Alignment = Element.ALIGN_CENTER });
        }
    }

writer 和 checkBoxAppearance 是从另一个函数传入的。以前在我的代码中，我正在创建一个带有复选框的表，但我需要在该表之外添加一个。我遵循http://simpledotnetsolutions.wordpress.com/2012/11/01/itextsharp-creating-form-fields/的代码

checkBoxAppearance 是一个定义复选框行为的数组。

并尝试将其修改为只有一个复选框。我也在尝试让文本显示在它旁边。

编辑： 我也在尝试这个：

private static void WriteFooter(Document doc, int page, int maxPages, bool lastPage, PdfWriter writer, PdfFormField checkboxField, PdfAppearance[] checkbox, PdfContentByte cb)
    {
        if(!lastPage)
        {
            doc.Add(new Paragraph("\nMA-2028.1-F2(Portrait) Page " + page + " of " + maxPages, Fonts.ExtraSmall));
            doc.NewPage();
        } else
        {
            PdfFormField field;
            RadioCheckField checkBox;

            for (int i = 0; i < 1; i++ )
            {
                checkBox = new RadioCheckField(writer, new Rectangle(20, 20), "noDelete", "Yes");
                field = checkBox.CheckField;
                field.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", checkbox[0]);
                field.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Yes", checkbox[1]);
                writer.AddAnnotation(field);
                //ColumnText.ShowTextAligned(cb, Element.ALIGN_RIGHT, new Phrase("No Users Need Deletion"), 210, 790, 0);
            }
            doc.Add(
                new Paragraph(
                    "Operations Management:\n\n", Fonts.Small) { Alignment = Element.ALIGN_CENTER });
            doc.Add(
                new Paragraph(
                    "Automation Manager or Designee:\n\n", Fonts.Small) { Alignment = Element.ALIGN_CENTER });
        }
    }

Answer 1

没关系，我找到了更好的方法。我的解决方案是将复选框放在表格中，然后以这种方式将其添加到 PDF 中。它看起来比我老板最初想要的方式干净得多。

private static void WriteFooter(Document doc, int page, int maxPages, bool lastPage, PdfWriter writer, PdfFormField checkboxField, PdfAppearance[] checkbox, PdfContentByte cb)
    {
        if(!lastPage)
        {
            doc.Add(new Paragraph("\nMA-2028.1-F2(Portrait) Page " + page + " of " + maxPages, Fonts.ExtraSmall));
            doc.NewPage();
        } else
        {
            PdfFormField footerField = PdfFormField.CreateEmpty(writer);
            PdfPTable footerTbl = new PdfPTable(2);
            float[] footerWidths = new float[] { 1f, 4f };
            PdfPCell noDeleteCell = new PdfPCell();
            PdfPCell noDeleteText = new PdfPCell(new Paragraph("No Users Require Deletion", Fonts.Small));
            RadioCheckField fCell = new RadioCheckField(writer, new Rectangle(20, 20), "NoDeletion", "Yes");
            fCell.CheckType = RadioCheckField.TYPE_CROSS;
            PdfFormField footerCheck = null;
            footerCheck = fCell.CheckField;
            footerCheck.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", checkbox[0]);
            footerCheck.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Yes", checkbox[1]);
            noDeleteCell.CellEvent = new ChildFieldEvent(footerField, footerCheck, 1, 20, 20);
            footerField.FieldName = "no_delete_table";
            footerTbl.SetWidths(footerWidths);
            footerTbl.AddCell(noDeleteCell);
            footerTbl.AddCell(noDeleteText);
            doc.Add(footerTbl);
            writer.AddAnnotation(footerField);
            doc.Add(
                new Paragraph(
                    "\n\nOperations Management: _______________________________________________   Date: ___________\n\n", Fonts.Small) { Alignment = Element.ALIGN_CENTER });
            doc.Add(
                new Paragraph(
                    "Automation Manager or Designee: _______________________________________________   Date: ___________\n\n", Fonts.Small) { Alignment = Element.ALIGN_CENTER });
            doc.Add(new Paragraph("\nMA-2028.1-F2(Portrait) Page " + page + " of " + maxPages, Fonts.ExtraSmall));
        }
    }