重复调用AddImageUrl(url)来组装pdf文档

Question

我正在使用 abcpdf，我很好奇我们是否可以递归调用 AddImageUrl() 函数来组装编译多个 url 的 pdf 文档？

类似于：

     int pageCount = 0;
     int theId = theDoc.AddImageUrl("http://stackoverflow.com/search?q=abcpdf+footer+page+x+out+of+", true, 0, true);
     //assemble document
     while (theDoc.Chainable(theId))
     {
        theDoc.Page = theDoc.AddPage();
        theId = theDoc.AddImageToChain(theId);
     }
     pageCount = theDoc.PageCount;
     Console.WriteLine("1 document page count:" + pageCount);
     //Flatten document
     for (int i = 1; i <= pageCount; i++)
     {
        theDoc.PageNumber = i;
        theDoc.Flatten();
     }

     //now try again
     theId = theDoc.AddImageUrl("http://stackoverflow.com/questions/1980890/pdf-report-generation", true, 0, true);
     //assemble document
     while (theDoc.Chainable(theId))
     {
        theDoc.Page = theDoc.AddPage();
        theId = theDoc.AddImageToChain(theId);
     }
     Console.WriteLine("2 document page count:" + theDoc.PageCount);
     //Flatten document
     for (int i = pageCount + 1; i <= theDoc.PageCount; i++)
     {
        theDoc.PageNumber = i;
        theDoc.Flatten();
     }
     pageCount = theDoc.PageCount;

编辑： 似乎基于“猎人”解决方案工作的代码：

      static void Main(string[] args)
  {
     Test2();
  }

  static void Test2()
  {

     Doc theDoc = new Doc();
     // Set minimum number of items a page of HTML should contain. 
     theDoc.HtmlOptions.ContentCount = 10;// Otherwise the page will be assumed to be invalid.
     theDoc.HtmlOptions.RetryCount = 10; // Try to obtain html page 10 times
     theDoc.HtmlOptions.Timeout = 180000;// The page must be obtained in less then 10 seconds

     theDoc.Rect.Inset(0, 10);  // set up document
     theDoc.Rect.Position(5, 15);
     theDoc.Rect.Width = 602;
     theDoc.Rect.Height = 767;
     theDoc.HtmlOptions.PageCacheEnabled = false;

     IList<string> urls = new List<string>();
     urls.Add("http://stackoverflow.com/search?q=abcpdf+footer+page+x+out+of+");
     urls.Add("http://stackoverflow.com/questions/1980890/pdf-report-generation");
     urls.Add("http://yahoo.com");
     urls.Add("http://stackoverflow.com/questions/4338364/recursively-call-addimageurlurl-to-assemble-pdf-document");

     foreach (string url in urls)
        AddImage(ref theDoc, url);

     //Flatten document
     for (int i = 1; i <= theDoc.PageCount; i++)
     {
        theDoc.PageNumber = i;
        theDoc.Flatten();
     }

     theDoc.Save("batchReport.pdf");
     theDoc.Clear();
     Console.Read();

  }


  static void AddImage(ref Doc theDoc, string url)
  {
     int theId = theDoc.AddImageUrl(url, true, 0, true);
     while (theDoc.Chainable(theId))
     {
        theDoc.Page = theDoc.AddPage();
        theId = theDoc.AddImageToChain(theId); // is this right?
     }
     Console.WriteLine(string.Format("document page count: {0}", theDoc.PageCount.ToString()));
  }

编辑2：不幸的是，在生成pdf文档时多次调用AddImageUrl似乎不起作用...

Answer 1

终于找到可靠的解决方案了。
我们不应该在同一个底层文档上执行 AddImageUrl() 函数，而应该在它自己的 Doc 文档上执行 AddImageUrl() 函数，并构建文档集合，最后我们将使用 Append() 方法将其组装成一个文档。
这是代码：

      static void Main(string[] args)
  {
     Test2();
  }

  static void Test2()
  {
     Doc theDoc = new Doc();
     var urls = new Dictionary<int, string>();
     urls.Add(1, "http://www.asp101.com/samples/server_execute_aspx.asp");
     urls.Add(2, "http://stackoverflow.com/questions/4338364/repeatedly-call-addimageurlurl-to-assemble-pdf-document");
     urls.Add(3, "http://www.google.ca/");
     urls.Add(4, "http://ca.yahoo.com/?p=us");
    var theDocs = new List<Doc>();

     foreach (int key in urls.Keys)
        theDocs.Add(GetReport(urls[key]));

     foreach (var doc in theDocs)
     {
        if (theDocs.IndexOf(doc) == 0)
           theDoc = doc;
        else
           theDoc.Append(doc);
     }

     theDoc.Save("batchReport.pdf");
     theDoc.Clear();
     Console.Read();

  }


  static Doc GetReport(string url)
  {

     Doc theDoc = new Doc();
     // Set minimum number of items a page of HTML should contain. 
     theDoc.HtmlOptions.ContentCount = 10;// Otherwise the page will be assumed to be invalid.
     theDoc.HtmlOptions.RetryCount = 10; // Try to obtain html page 10 times
     theDoc.HtmlOptions.Timeout = 180000;// The page must be obtained in less then 10 seconds

     theDoc.Rect.Inset(0, 10);  // set up document
     theDoc.Rect.Position(5, 15);
     theDoc.Rect.Width = 602;
     theDoc.Rect.Height = 767;
     theDoc.HtmlOptions.PageCacheEnabled = false;

     int theId = theDoc.AddImageUrl(url, true, 0, true);
     while (theDoc.Chainable(theId))
     {
        theDoc.Page = theDoc.AddPage();
        theId = theDoc.AddImageToChain(theId);
     }

     //Flatten document
     for (int i = 1; i <= theDoc.PageCount; i++)
     {
        theDoc.PageNumber = i;
        theDoc.Flatten();
     }

     return theDoc;
  }

  }