static void a5()
{
string dataDir4 = @“D:\4.pdf”;
string dataDir5 = @“D:\5.pdf”;
File.Delete(dataDir5);
Font font = FontRepository.FindFont("SimSun");
Document doc = new Document(dataDir4);
int PageIndex = 1;
var page = doc.Pages[PageIndex];
TextFragmentAbsorber textFragmentAbsorber = new TextFragmentAbsorber("Short communication");
page.Accept(textFragmentAbsorber);
TextFragmentCollection textFragmentCollection = textFragmentAbsorber.TextFragments;
TextFragment text = new TextFragment("bbb[\r\n]bbbbbbbbbb[\n\r]bbbbb");
page.Paragraphs.Add(text);//这个可以
foreach (TextFragment tf in textFragmentCollection)
{
tf.Text = "bbb[\r\n]bbbbbbbbbb[\n\r]bbbbb";//这就不行
}
doc.Save(dataDir5);
}