文档半岛外围网上直营>>Spire.PDF教程-文档操作>>【教程】Spire.PDF教程:C# 如何在PDF中创建目录
【教程】Spire.PDF教程:C# 如何在PDF中创建目录
Spire.PDF是一个专业的PDF组件,能够独立地创建、编写、编辑、操作和阅读PDF文件,支持 .NET、Java、WPF和Silverlight。
对于大型PDF文件,使用目录可以让文档更容易访问。通常,在PDF文档中目录被放在第一个页面。使用Spire.PDF, 我们可以添加新的空白页到现有的PDF文档中,然后再创建目录。下面我们将通过详细的代码来实现。
//加载PDF示例文档
PdfDocument doc = new PdfDocument();
doc.LoadFromFile("Spire.pdf");
//获取PDF页数
int pageCount = doc.Pages.Count;
//在第一页插入空白页
PdfPageBase tocPage = doc.Pages.Insert(0);
//添加标题,并设置字体、样式和位置
string title = "目录";
PdfTrueTypeFont titleFont = new PdfTrueTypeFont(new Font("宋体", 16, FontStyle.Bold),true);
PdfStringFormat centerAlignment = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle);
PointF location = new PointF(tocPage.Canvas.ClientSize.Width / 2, titleFont.MeasureString(title).Height);
tocPage.Canvas.DrawString(title, titleFont, PdfBrushes.Black, location, centerAlignment);
//设置目录文本内容
PdfTrueTypeFont titlesFont = new PdfTrueTypeFont(new Font("宋体", 10),true);
String[] titles = new String[pageCount];
for (int i = 0; i < titles.Length; i++)
{
titles[i] = string.Format("文件第{0}页", i + 1);
}
float y = titleFont.MeasureString(title).Height + 10;
float x = 0;
for (int i = 1; i <= pageCount; i++)
{
string text = titles[i - 1];
SizeF titleSize = titlesFont.MeasureString(text);
PdfPageBase navigatedPage = doc.Pages[i];
string pageNumText = (i + 1).ToString();
SizeF pageNumTextSize = titlesFont.MeasureString(pageNumText);
tocPage.Canvas.DrawString(text, titlesFont, PdfBrushes.Black, 0, y);
float dotLocation = titleSize.Width + 2 + x;
float pageNumlocation = tocPage.Canvas.ClientSize.Width - pageNumTextSize.Width;
for (float j = dotLocation; j < pageNumlocation; j++)
{
if (dotLocation >= pageNumlocation)
{
break;
}
tocPage.Canvas.DrawString(".", titlesFont, PdfBrushes.Black, dotLocation, y);
dotLocation += 2;
}
tocPage.Canvas.DrawString(pageNumText, titlesFont, PdfBrushes.Black, pageNumlocation, y);
//添加动作
location = new PointF(0, y);
RectangleF titleBounds = new RectangleF(location, new SizeF(tocPage.Canvas.ClientSize.Width, titleSize.Height));
PdfDestination Dest = new PdfDestination(navigatedPage, new PointF(-doc.PageSettings.Margins.Top, -doc.PageSettings.Margins.Left));
PdfActionAnnotation action = new PdfActionAnnotation(titleBounds, new PdfGoToAction(Dest));
action.Border = new PdfAnnotationBorder(0);
(tocPage as PdfNewPage).Annotations.Add(action);
y += titleSize.Height + 10;
//保存已添加目录文档
string output = "目录文档.pdf";
doc.SaveToFile(output, FileFormat.PDF);
System.Diagnostics.Process.Start("目录文档.pdf");
}截图:


QQ交谈
在线咨询

渝公网安备
50010702500608号

客服热线