PDF文檔中的書簽允許用戶通過單擊指定的書簽標題跳轉到文檔的相應部分。使用Spire.PDF，程序員可以將書簽添加到PDF文檔或從現有PDF文檔中提取書簽。

關聯產品

• Spire.PDF

代碼段：

Step 1：定義自定義函數以獲取所有總書簽的標題以及子書簽，并在控制臺上打印結果。

static void GetBookmarkTitle(PdfBookmarkCollection bookmarks)
{
    if (bookmarks.Count > 0)
    {
        foreach (PdfBookmark parentBookmark in bookmarks)
        {
            Console.WriteLine(parentBookmark.Title);
            foreach (PdfBookmark childBookmark in parentBookmark)
            {
                Console.WriteLine(childBookmark.Title);
                GetBookmarkTitle(childBookmark);
            }
        }
    }
}

Step 2：初始化Pdf Document類的實例，并加載具有多級書簽的示例PDF文檔。

PdfDocument doc = new PdfDocument();
doc.LoadFromFile(@"C:\Users\Administrator\Desktop\Bookmark.pdf");

Step 3：調用GetBookmarkTitle方法獲取文檔中的所有書簽。

PdfBookmarkCollection bookmarks = doc.Bookmarks;
GetBookmarkTitle(bookmarks);

完整代碼：

[C#]

static void Main(string[] args)
{
    PdfDocument doc = new PdfDocument();
    doc.LoadFromFile(@"C:\Users\Administrator\Desktop\Bookmark.pdf");
    PdfBookmarkCollection bookmarks = doc.Bookmarks;
    GetBookmarkTitle(bookmarks);
    Console.ReadLine();
}
static void GetBookmarkTitle(PdfBookmarkCollection bookmarks)
{
    if (bookmarks.Count > 0)
    {
        foreach (PdfBookmark parentBookmark in bookmarks)
        {
            Console.WriteLine(parentBookmark.Title);
            foreach (PdfBookmark childBookmark in parentBookmark)
            {
               Console.WriteLine(childBookmark.Title);
                GetBookmarkTitle(childBookmark);
            }
        }
    }
}

[VB.NET]

Private Shared Sub Main(args As String())
    Dim doc As New PdfDocument()
    doc.LoadFromFile("C:\Users\Administrator\Desktop\Bookmark.pdf")
    Dim bookmarks As PdfBookmarkCollection = doc.Bookmarks
    GetBookmarkTitle(bookmarks)
    Console.ReadLine()
End Sub
Private Shared Sub GetBookmarkTitle(bookmarks As PdfBookmarkCollection)
    If bookmarks.Count > 0 Then
        For Each parentBookmark As PdfBookmark In bookmarks
            Console.WriteLine(parentBookmark.Title)
            For Each childBookmark As PdfBookmark In parentBookmark
                Console.WriteLine(childBookmark.Title)
                GetBookmarkTitle(childBookmark)
            Next
        Next
    End If
End Sub

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