Spire.PDF 是一款功能强大的组件，支持给 PDF 文档添加动作。如打开文档执行的动作，前一个动作完成后执行的动作，关闭文档执行的动作。以下示例将介绍如何给 PDF 文档添加动作链。

添加在打开PDF 文档后执行的动作

//初始化一个PdfDocument实例
 PdfDocument document = new PdfDocument();

 //设置文本字体
 Font font = new Font(""微软雅黑"", 20f);
 PdfTrueTypeFont trueTypeFont = new PdfTrueTypeFont(font, true);

//添加两张页面并添加文本
PdfPageBase page1 = document.Pages.Add();
 page1.Canvas.DrawString(""第一张页面"", trueTypeFont, new PdfSolidBrush(Color.Black), 10, 10);

 PdfPageBase page2 = document.Pages.Add();
 page2.Canvas.DrawString(""第二张页面"", trueTypeFont, new PdfSolidBrush(Color.Black), 10, 10);

 //javascript代码
 String script
                 = ""app.alert({""
                 + ""    cMsg: \""您好，我是第一个动作！\"",""
                 + ""    nIcon: 3,""
                 + ""    cTitle: \""JavaScript Action\""""
                 + ""});"";

 // 创建PdfJavaScriptAction实例 action1
 PdfJavaScriptAction action1 = new PdfJavaScriptAction(script);

 //设置action1在打开PDF文档后执行
 document.AfterOpenAction = action1;

'初始化一个PdfDocument实例 Dim document As New PdfDocument() '设置文本字体
Dim font As New Font(""微软雅黑"", 20F)
Dim trueTypeFont As New PdfTrueTypeFont(font, True)

'添加两张页面并添加文本 Dim page1 As PdfPageBase = document.Pages.Add() page1.Canvas.DrawString(""第一张页面"",trueTypeFont,New PdfSolidBrush(Color.Black),10,10) Dim page2 As PdfPageBase = document.Pages.Add() page2.Canvas.DrawString(""第二张页面"",trueTypeFont,New PdfSolidBrush(Color.Black),10,10) 'javascript代码
Dim script As [String] = ""app.alert({"" + ""    cMsg: """"您好，我是第一个动作！"""","" + ""    nIcon: 3,"" + ""    cTitle: """"JavaScript Action"""""" + ""});""

' 创建PdfJavaScriptAction实例 action1 Dim action1 As New PdfJavaScriptAction(script) '设置action1在打开PDF文档后执行
document.AfterOpenAction = action1

添加在第一个动作完成后执行的动作

//创建一个PdfGoToAction定向到PDF文档的第2页
PdfDestination dest = new PdfDestination(page1);
PdfGoToAction action2 = new PdfGoToAction(dest);

//设置action2在action1完成后执行，即跳转到PDF的第2页
action1.NextAction = action2;

'创建一个PdfGoToAction定向到PDF文档的第2页 Dim dest As New PdfDestination(page1) Dim action2 As New PdfGoToAction(dest) '设置action2在action1完成后执行，即跳转到PDF的第2页
action1.NextAction = action2

添加在关闭PDF文档前执行的动作

script
                = "app.alert({"
                + "    cMsg: \"谢谢您的查看，再见！\","
                + "    nIcon: 3,"
                + "    cTitle: \"JavaScript Action\""
                + "});";
PdfJavaScriptAction action3 = new PdfJavaScriptAction(script);
document.BeforeCloseAction = action3;

//保存文档
document.SaveToFile("结果文档.pdf");

script = "app.alert({" + "    cMsg: ""谢谢您的查看，再见！""," + "    nIcon: 3," + "    cTitle: ""JavaScript Action""" + "});"
Dim action3 As New PdfJavaScriptAction(script)
document.BeforeCloseAction = action3

'保存文档 document.SaveToFile("结果文档.pdf")