private void button1_Click(object sender, EventArgs e)
{
//Create a pdf document
PdfDocument doc = new PdfDocument();
//Load file from disk
doc.LoadFromFile(@"..\..\..\..\..\..\Data\LinkAnnotation.pdf");
//Get the first page
PdfPageBase page = doc.Pages[0];
//Get the annotation collection
PdfAnnotationCollection annotations = page.AnnotationsWidget;
//Create StringBuilder to save
StringBuilder content = new StringBuilder();
//Verify whether widgetCollection is not null or not
if (annotations.Count > 0)
{
//traverse the PdfAnnotationCollection
foreach (PdfAnnotation pdfAnnotation in annotations)
{
//if it is PdfTextWebLinkAnnotationWidget
if (pdfAnnotation is PdfTextWebLinkAnnotationWidget)
{
//Get the Url
PdfTextWebLinkAnnotationWidget WebLinkAnnotation = pdfAnnotation as PdfTextWebLinkAnnotationWidget;
string url = WebLinkAnnotation.Url;
//Add strings to StringBuilder
content.AppendLine("The url of link annotation is " + url);
content.AppendLine("The text of link annotation is " + WebLinkAnnotation.Text);
}
}
}
String result = "GetLinkAnnotation_out.txt";
//Save them to a txt file
File.WriteAllText(result, content.ToString());
//Launch the file
DocumentViewer(result);
}
private void button1_Click(object sender, EventArgs e)
{
//Create a pdf document
PdfDocument doc = new PdfDocument();
//Load file from disk
doc.LoadFromFile(@"..\..\..\..\..\..\Data\LinkAnnotation.pdf");
//Get the first page
PdfPageBase page = doc.Pages[0];
//Get the annotation collection
PdfAnnotationCollection annotations = page.AnnotationsWidget;
//Verify whether widgetCollection is not null or not
if (annotations.Count > 0)
{
//traverse the PdfAnnotationCollection
foreach (PdfAnnotation pdfAnnotation in annotations)
{
//if it is PdfTextWebLinkAnnotationWidget
if (pdfAnnotation is PdfTextWebLinkAnnotationWidget)
{
//Get the link annotation
PdfTextWebLinkAnnotationWidget annotation = pdfAnnotation as PdfTextWebLinkAnnotationWidget;
//Change the url
annotation.Url = "http://www.e-iceblue.com/Introduce/pdf-for-net-introduce.html";
}
}
}
String result = "ExtractAndUpdateLink_out.pdf";
//Save the document
doc.SaveToFile(result);
//Launch the Pdf file
PDFDocumentViewer(result);
}
private void button1_Click(object sender, EventArgs e)
{
//Load an existing PDF file
PdfDocument document = new PdfDocument();
document.LoadFromFile(@"..\..\..\..\..\..\Data\RemoveHyperlinks.pdf");
//Get the first page
PdfPageBase page = document.Pages[0];
//Get the annotation collection
PdfAnnotationCollection widgetCollection = page.AnnotationsWidget;
//Verify whether widgetCollection is null or not
if (widgetCollection.Count > 0)
{
for (int i = widgetCollection.Count - 1; i >= 0; i--)
{
PdfAnnotation annotation = widgetCollection[i];
//Get the TextWebLink Annotation
if (annotation is PdfTextWebLinkAnnotationWidget)
{
PdfTextWebLinkAnnotationWidget link = annotation as PdfTextWebLinkAnnotationWidget;
//Remove the TextWebLink annotation
widgetCollection.Remove(link);
}
}
}
string output = "RemoveHyperlinks-result.pdf";
document.SaveToFile(output);
//Launch the Pdf file
PDFDocumentViewer(output);
}