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

關(guān)聯(lián)產(chǎn)品

• Spire.PDF

代碼段：

Step 1：定義自定義函數(shù)以獲取所有總書簽的標(biāo)題以及子書簽，并在控制臺(tái)上打印結(jié)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(shí)例，并加載具有多級(jí)書簽的示例PDF文檔。

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

Step 3：調(diào)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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