经过进一步审查,该领域的裁决被推翻.如果你将压模压平,那么结果文件中没有显示字段(因为它们缺少"外观"设置).顺便说一句,表单展平会阻止表单字段的进一步编辑.现在我们可以为表单添加外观,但是,更简单的方法是使用TextField类,而不必担心显式设置"外观"对象.
public void ABetterWayToAddFormFieldToExistingPDF( )
{
PdfReader reader = new PdfReader(@"c:\existing.pdf");
FileStream out = new FileStream(@"C:\existingPlusFields.pdf", FileMode.Create, FileAccess.Write);
PdfStamper stamp = new PdfStamper(reader, out);
TextField field = new TextField(stamp.Writer, new iTextSharp.text.Rectangle(40, 500, 360, 530), "some_text");
// add the field here, the second param is the page you want it on
stamp.AddAnnotation(field.GetTextField(), 1);
stamp.FormFlattening = true; // lock fields and prevent further edits.
stamp.Close();
}
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