一个在PDF上添加CheckBox的例子

【IT168技术文档】


  有人需要就贴了出来了，这个系列的100多个demo去年已经翻译完毕，一直想不出有什么必要放出来，搁置半年了。

using System;
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;
public class form_checkbox
{
[STAThread]
public static void  Main(string[] args)
{
Document document = new Document(PageSize.A4, 50, 50, 50, 50);
try
{
// creation of the different writers
            PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(@"e:\java\form_checkbox.Pdf", FileMode.Create));
document.Open();
PdfContentByte cb = writer.DirectContent;
cb.MoveTo(0, 0);
PdfFormField field = PdfFormField.CreateCheckBox(writer);
PdfAppearance tpOff = cb.CreateAppearance(20, 20);
PdfAppearance tpOn = cb.CreateAppearance(20, 20);
tpOff.Rectangle(1, 1, 18, 18);
tpOff.Stroke();
tpOn.SetRGBColorFill(255, 128, 128);
tpOn.Rectangle(1, 1, 18, 18);
tpOn.FillStroke();
tpOn.MoveTo(1, 1);
tpOn.LineTo(19, 19);
tpOn.MoveTo(1, 19);
tpOn.LineTo(19, 1);
tpOn.Stroke();
field.SetWidget(new Rectangle(100, 700, 120, 720), PdfAnnotation.HIGHLIGHT_INVERT);
field.FieldName=("Urgent");
field.ValueAsName=("Off");
field.AppearanceState=("Off");
field.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", tpOff);
field.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "On", tpOn);
writer.AddAnnotation(field);
document.Close();
System.Console.Out.WriteLine("FIM.");
}
catch (System.Exception de)
{
System.Console.Error.WriteLine(de.Message);
}
}
}