我有些麻烦在现有的PDF上画圆,我找到了一段代码可以在现有的PDF上添加文本,我试图将其改编成画圆的代码,但结果只是一个空白页面。有人有想法如何解决这个问题吗?
我的代码:
我的代码:
string oldFile = @"C:\...6166-21.pdf";
string newFile = @"C:\...NEW.pdf";
// open the reader
PdfReader reader = new PdfReader(oldFile);
Rectangle size = reader.GetPageSizeWithRotation(1);
Document document = new Document(size);
FileStream fs = new FileStream(newFile, FileMode.Create, FileAccess.Write);
PdfWriter writer = PdfWriter.GetInstance(document, fs);
document.Open();
// the pdf content
PdfContentByte cb = writer.DirectContent;
cb.Circle(150f, 150f, 50f);
cb.SetColorStroke(iTextSharp.text.BaseColor.GREEN);
// create the new page and add it to the pdf
PdfImportedPage page = writer.GetImportedPage(reader, 1);
cb.AddTemplate(page, 0, 0);
// close the streams and voilá the file should be changed :)
document.Close();
fs.Close();
writer.Close();
reader.Close();