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Rank: Advanced Member
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I've tracked down what appears to be the issue with load times.
I'm generating a pdf using html to pdf. I'm rendering the document twice. The first time I build the table of contents, then outputting it a second time.
The pdf is roughly 70-90 pages long.
Rendering the pdf with {page_number} takes 32-35 seconds. By just removing that tag, the same takes 11-14 seconds
Including the page number is important. Is there another way to do this or how can we speed this up?
thanks!
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Rank: Administration
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Hi,
Yes. Using page footer will delay the process significantly because it calls the HTML to PDF converter again on each page. To speed up the process, you can use the ACM interface (PDF Creator) to generate the page footer. ACM interface is much less powerful than the HTML to PDF interface but is much faster. You can take a look of the corresponding help and sample to find more information about how to use it. If you still have any questions, please feel free to ask.
Thanks!
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Thanks for the quick reply. Would I do this in On_AfterRenderPage ? Do you happen to have an example?
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Rank: Advanced Member
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Rank: Advanced Member
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That worked great - thanks.
Any other ideas for speeding up rendering?
The other biggie seems to be rendering the html twice to get the table of contents:
EO.Pdf.HtmlToPdf.ConvertHtml(html, response.OutputStream, options); gets called twice.
Thanks again.
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Rank: Administration
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Hi,
I am not exactly sure what you meant. You will need to call ConvertHtml twice if you want to fill in page numbers for your table of contents and there is no way to avoid calling it twice. However on the second call you do not have to convert the main contents. You can only convert the table of contents. If you do not need page number, then you can simply use HTML links in your table of contents and only call ConvertHtml once.
Thanks!
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Rank: Advanced Member
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Nice - good suggestion. I had been rendering the full report twice. I found some details on what you meant here: (to help the next guy who comes across this post) http://www.essentialobjects.com/forum/postst7713_Manually-Adding-TOC--Paging-Issue.aspx
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Great. Thank you very much for posting the link!
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Rank: Advanced Member
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small problem - when I merge my ToC with the main report, the clickable page numbers on the toc don't work. I assume this is because of merging two different documents.
How would I fix this?
thanks!
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Ah...you are right. You will have to reconvert the whole document again together in this case. Sorry for disappointing you. :(
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ahh, that's too bad. There's definitely no other way to make those anchor links work when merging a document?
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Hi, There is a more complicated way to do it but it would require some code. The key is to use this method: http://www.essentialobjects.com/doc/4/eo.pdf.pdfdocument.merge_overload_2.aspxWhen using this method to merge the documents, it will update the corresponding HtmlDocument objects. That makes it possible for you to recreate all the links based on the merged HtmlDocument objects. In order to do so, you would get the corresponding source and target HtmlElement objects from the HtmlDocument objects, then use this method to manually create the link between them: http://www.essentialobjects.com/doc/4/eo.pdf.htmlelement.createlink_overload_2.aspxHope this helps. Thanks!
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I think I follow what you're saying part of the way. After rendering the main body of the report, I then render the TOC pdf. While doing that I produce one of these for each item in the list: HtmlElement elmCustomReportNotesPage = contentResult.HtmlDocument.GetElementById("CustomReportNotesPage"); toc.CustomReportNotesPageNumber = "<a href='#CustomReportNotesPage'>" + elmCustomReportNotesPage.Location.Page.ToString() + "</a>"; That's what I use to write out the number. From what I understand, I would need to somehow write out an HtmlElement at this point? Then, within each of the reports where I currently have: <h1 id="CustomReportNotesPage" name="CustomReportNotesPage" style="page-break-before: always;width:600px;" class="report">Custom Report Notes</h1> I'd need to include something here? As far as using the correct Merge function, I understand which one you want me to use.
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Hi,
You would get the HtmlElement object from the HtmlDocument object. For example:
HtmlElement e = result.HtmlDocument.GetElementById("CustomReportNotesPage");
Thanks!
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Rank: Advanced Member
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I dont suppose you have a code sample with some more details?
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Rank: Administration
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Hi, It will be something like this:
Code: C#
//Convert both documents
PdfDocument doc1 = new PdfDocument();
PdfDocument doc2 = new PdfDocument();
HtmlToPdfResult result1 = HtmlToPdf.ConvertHtml(htmlTableString1, doc1);
HtmlToPdfResult result2 = HtmlToPdf.ConvertHtml(htmlTableString2, doc2);
//Merge them
PdfDocument docMerged = PdfDocument.Merge(result1, result2);
//Get the source and the target
HtmlElement source = result1.HtmlDocument.GetElementById("id1");
PdfPageLocation target = result2.HtmlDocument.GetElementById("id2").Location;
//Create the link
PdfLink link = source.CreateLink(target);
link.Render();
Thanks!
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Rank: Advanced Member
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ah, i see. perfect, thx.
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