Aspose.Pdf使用教程：從PDF文件中獲取注釋

PDF每頁的注釋都可以在該頁的注釋集合中找到，如果要找到某一個特定的注釋，就必須先為該注釋制定一個索引。

》》》下載Aspose.Pdf試用版

下面的代碼片段顯示了你如何獲得一個特定的注釋和它的屬性：

C#

//open document
Document pdfDocument = new Document("input.pdf");

//get particular annotation
TextAnnotation textAnnotation = (TextAnnotation)pdfDocument.Pages[1].Annotations[1];
//get annotation properties
Console.WriteLine("Title : {0} ", textAnnotation.Title);
Console.WriteLine("Subject : {0} ", textAnnotation.Subject);
Console.WriteLine("Contents : {0} ", textAnnotation.Contents);

VB.NET

'open document
Dim pdfDocument As New Document("input.pdf")

'get particular annotation
Dim textAnnotation As TextAnnotation = CType(pdfDocument.Pages(1).Annotations(1), TextAnnotation)
'get annotation properties
Console.WriteLine("Title : {0} ", textAnnotation.Title)
Console.WriteLine("Subject : {0} ", textAnnotation.Subject)
Console.WriteLine("Contents : {0} ", textAnnotation.Contents)