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Performance Issue for HTML to PDF Conversion using Apose PDF

Hi,


we are using a lincesed version Aspose PDF for HTML to PDF conversion. For this conversion it is taking, in most of the cases, more than 1 minute, which is not acceptable for day to day usage.

Following the source code we are using for HTML to PDF conversion.

Aspose.Pdf.License license = new Aspose.Pdf.License();
license.SetLicense("d:\\xxxxx\\Aspose.Pdf.lic");
// Instantiate an object PDF class
Aspose.Pdf.Generator.Pdf pdf = new Aspose.Pdf.Generator.Pdf();
// add the section to PDF document sections collection
Aspose.Pdf.Generator.Section section = pdf.Sections.Add();
// Create Header Section of the document
Aspose.Pdf.Generator.HeaderFooter header = new Aspose.Pdf.Generator.HeaderFooter(section);

//Create Footer Section of the document
Aspose.Pdf.Generator.HeaderFooter footer = new Aspose.Pdf.Generator.HeaderFooter(section);

Aspose.Pdf.Generator.MarginInfo marginInfo = new Aspose.Pdf.Generator.MarginInfo();
marginInfo.Left = 30;
section.PageInfo.Margin = marginInfo;
// set the Odd Footer for the PDF file
section.OddFooter = footer;
// Set the Even Footer for the PDF file
section.EvenFooter = footer;
// set the Odd header for the PDF file
section.OddHeader = header;
// Set the Even Header for the PDF file
section.EvenHeader = header;
Aspose.Pdf.Generator.Text txt = new Aspose.Pdf.Generator.Text(section, headerText.ToString());
Aspose.Pdf.Generator.Text txtFooter = new Aspose.Pdf.Generator.Text(section, FooterText.ToString());
//txt.IfHtmlTagSupportedOverwriteHtmlFontNames = true;
txt.UseTextInfoStyle = true;
txt.Margin.Bottom = 5;
txt.Margin.Top = 50;
txt.Margin.Left = 1;
txt.TextInfo.FontSize = 9;
txt.TextInfo.IsTrueTypeFontBold = true;
txt.TextInfo.FontName = "Arial";


txtFooter.Margin.Bottom = 5;
txtFooter.Margin.Top = 20;
txtFooter.Margin.Left = 30;
txtFooter.TextInfo.FontSize = 8;
txtFooter.TextInfo.IsTrueTypeFontBold = true;
txtFooter.TextInfo.FontName = "Arial";


// Add text to Header section of the Pdf file
header.Paragraphs.Add(txt);

// Add text to Footer section of the Pdf file
footer.Paragraphs.Add(txtFooter);

// Read the contents of HTML file into StreamReader object
StreamReader r = File.OpenText(strTemplateRead);
//Create text paragraphs containing HTML text
Aspose.Pdf.Generator.Text text2 = new Aspose.Pdf.Generator.Text(section, r.ReadToEnd());
// enable the property to display HTML contents within their own formatting
text2.IsHtmlTagSupported = true;
//Add the text paragraphs containing HTML text to the section
section.Paragraphs.Add(text2);

Context.Response.ClearHeaders();
Context.Response.ContentType = "application/pdf";
Context.Response.Clear();
Context.Response.AppendHeader("Content-Disposition", "attachment");
pdf.Save("NewDoc.pdf", Apdf.SaveType.OpenInBrowser, Context.Response);
r.Close();
Context.Response.Close();

Also attaching HTML for sample.

Saw lot of post on performance issues for HTML to PDF conversion.
Please suggest how it could be improved.

Thanks
Dinesh

Hi Dinesh,


Thanks for using our products.

I am afraid I cannot find any HTML with your earlier post.

I have tested the scenario using Aspose.Pdf for .NET 8.5.0 where I have used the attached HTML file and as per my observations, the process to convert HTML file to PDF format using VisualStudio 2010 application running over Windows 7(x64) is taking 3.4 seconds. Can you please again try sharing the HTML file so that we can test the scenario at our end. We are sorry for this inconvenience.


PS, please rename the attached file from .txt to .html

Hi,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

We are still getting performance issues with following error when converting HTML to PDF:

***Logging started***

29/10/2013 2:49:50 PM ReportsPDF - ExportToPDF - : Template ReadE:/ARMS/HTMFiles/rptIndex_of_Organisation_And_Agency_Names_read.htm

System.NullReferenceException Object reference not set to an instance of an object. at


.š.[1](String , Pdf , Section , Text )

at


.š.[1](Pdf , Section , Cell , Text , HeaderFooter , [1] , ‹ )

at


.š.[1](Pdf , Section , Table , Cell , Text , HeaderFooter , [1] , ‹ )

at


.œ.[1](Pdf , Section , HeaderFooter , Table , Row , Cell , Text , [1] , ‹ , Boolean )

at


..[1](Pdf , Section , [1] )

at


..[1](Pdf )

at


..[1]( , Pdf )

at Aspose.Pdf.Generator.Pdf.Save(String fileName, SaveType saveType, HttpResponse response)

at ArmsRepository.ARMSReportHelper.ExportToPDF(String readTemplate, HttpResponse response, String[] sHeaderFooter, String sReportNumber) in E:\ArMS_Bh\ECS.ArMS.Repository\ARMSReportHelper.cs:line 3734

***Logging ended***

***Logging started***

29/10/2013 2:49:50 PM ReportsPDF - ReportGridView_RowCommand

System.NullReferenceException Object reference not set to an instance of an object. at


.š.[1](String , Pdf , Section , Text )

at


.š.[1](Pdf , Section , Cell , Text , HeaderFooter , [1] , ‹ )

at


.š.[1](Pdf , Section , Table , Cell , Text , HeaderFooter , [1] , ‹ )

at


.œ.[1](Pdf , Section , HeaderFooter , Table , Row , Cell , Text , [1] , ‹ , Boolean )

at


..[1](Pdf , Section , [1] )

at


..[1](Pdf )

at


..[1]( , Pdf )

at Aspose.Pdf.Generator.Pdf.Save(String fileName, SaveType saveType, HttpResponse response)

at ArmsRepository.ARMSReportHelper.ExportToPDF(String readTemplate, HttpResponse response, String[] sHeaderFooter, String sReportNumber) in E:\ArMS_Bh\ECS.ArMS.Repository\ARMSReportHelper.cs:line 3785

at ArmsRepository.ArMSRepository.ExportToPDF(String readTemplate, HttpResponse response, String[] sHeaderFooter, String sReportNumber) in E:\ArMS_Bh\ECS.ArMS.Repository\ArMSRepository.cs:line 409

at ECS.ArMS.ReportsPdf.ReportGridView_RowCommand(Object sender, GridViewCommandEventArgs e) in E:\ArMS_Bh\ECS.ArMS\ReportsPdf.aspx.cs:line 197

***Logging ended***

Code which we are using for HTML to PDF conversion is:

public static void ExportToPDF(string readTemplate, HttpResponse response, String[] sHeaderFooter, string sReportNumber)

{

StreamReader r = File.OpenText(readTemplate);

try

{

Aspose.Pdf.License license = new Aspose.Pdf.License();

license.SetLicense(System.Web.HttpContext.Current.Server.MapPath("bin/Aspose.Pdf.lic"));

// Instantiate an object PDF class

Aspose.Pdf.Generator.Pdf pdf = new Aspose.Pdf.Generator.Pdf();

// add the section to PDF document sections collection

Aspose.Pdf.Generator.Section section = pdf.Sections.Add();

// Create Header Section of the document

Aspose.Pdf.Generator.HeaderFooter header = new Aspose.Pdf.Generator.HeaderFooter(section);

// set the Odd header for the PDF file

section.OddHeader = header;

// Set the Even Header for the PDF file

section.EvenHeader = header;

// add the section to PDF document sections collection

Aspose.Pdf.Generator.Section section1 = pdf.Sections.Add();

// Create Footer Section of the document

Aspose.Pdf.Generator.HeaderFooter footer = new Aspose.Pdf.Generator.HeaderFooter(section1);

// set the Odd footer for the PDF file

section.OddFooter = footer;

// Set the Even footer for the PDF file

section.EvenFooter = footer;

// add the section to PDF document sections collection

Aspose.Pdf.Generator.Section section2 = pdf.Sections.Add();

Aspose.Pdf.Generator.Text txt = new Aspose.Pdf.Generator.Text(section, sHeaderFooter[0].ToString());

Aspose.Pdf.Generator.Text txtFooter = new Aspose.Pdf.Generator.Text(section1, sHeaderFooter[1].ToString());

txt.Margin.Top = 50;

txt.Margin.Left = 8;

txt.TextInfo.FontSize = 9;

txt.TextInfo.IsTrueTypeFontBold = true;

txt.TextInfo.FontName = "Arial";

txtFooter.Margin.Bottom = 5;

txtFooter.Margin.Top = 20;

txtFooter.Margin.Left = 30;

txtFooter.TextInfo.FontSize = 8;

txtFooter.TextInfo.IsTrueTypeFontBold = true;

txtFooter.TextInfo.FontName = "Arial";

// Add text to footer section of the Pdf file

footer.Paragraphs.Add(txtFooter);

// Add text to Header section of the Pdf file

header.Paragraphs.Add(txt);

//Create text paragraphs containing HTML text

Aspose.Pdf.Generator.Text text2 = new Aspose.Pdf.Generator.Text(section, r.ReadToEnd());

// enable the property to display HTML contents within their own formatting

//Start : Added the property to bind the Fontsize & Name (Rajesh.L)

text2.IsHtmlTagSupported = true;

text2.TextInfo.FontSize = 8;

text2.TextInfo.FontName = "Arial";

text2.TextInfo.IsTrueTypeFontBold = true;

text2.IfHtmlTagSupportedOverwriteHtmlFontNames = true;

text2.IfHtmlTagSupportedOverwriteHtmlFontSizes = true;

if (string.Compare(sReportNumber, "07") == 0)

{

text2.TextInfo.IsTrueTypeFontBold = false;

}

if (string.Compare(sReportNumber, "05") == 0)

{

txt.TextInfo.FontSize = 7;

txt.TextInfo.IsTrueTypeFontBold = false;

header.Margin.Right = 2;

}

else if (string.Compare(sReportNumber, "01") == 0

|| string.Compare(sReportNumber, "02") == 0

|| string.Compare(sReportNumber, "03") == 0

|| string.Compare(sReportNumber, "04") == 0

|| string.Compare(sReportNumber, "06") == 0

|| string.Compare(sReportNumber, "08") == 0

|| string.Compare(sReportNumber, "10") == 0

|| string.Compare(sReportNumber, "11") == 0

|| string.Compare(sReportNumber, "13") == 0

|| string.Compare(sReportNumber, "14") == 0

|| string.Compare(sReportNumber, "15") == 0

|| string.Compare(sReportNumber, "16") == 0

|| string.Compare(sReportNumber, "17") == 0

|| string.Compare(sReportNumber, "19") == 0

|| string.Compare(sReportNumber, "20") == 0

)

{

text2.TextInfo.FontSize = 9;

}

//End : Added the property to bind the Fontsize & Name (Rajesh.L)

//Add the text paragraphs containing HTML text to the section

section.Paragraphs.Add(text2);

response.ClearHeaders();

response.ContentType = "application/pdf";

response.Clear();

response.AppendHeader("Content-Disposition", "attachment");

r.Close();

pdf.Save("NewDoc.pdf", Apdf.SaveType.OpenInBrowser, response);

response.Close();

HttpContext.Current.ApplicationInstance.CompleteRequest();

}

#region Exceptions

catch (NotSupportedException notsupex)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template : Not Supported Exception :", notsupex).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (UnauthorizedAccessException unauthex)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template :Unauthorized access Exception :", unauthex).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (DirectoryNotFoundException direx)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template : Directory not found Exception :", direx).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (ArgumentNullException argnull)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template : Arguments Null Exception :", argnull).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (ArgumentOutOfRangeException argsoorex)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template : Arguments Out of range Exception :", argsoorex).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (ArgumentException argex)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template : Arguments Exception :", argex).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (PathTooLongException pathex)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template : IO Path Too long Exception :", pathex).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (HttpException httpex)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - Template : Http Exception :", httpex).WriteLog(HttpContext.Current.User.Identity.Name);

}

catch (Exception ex)

{

new CustomExceptionHandler("ReportsPDF - ExportToPDF - : Template Read" + readTemplate, ex).WriteLog(HttpContext.Current.User.Identity.Name);

throw;

}

finally

{

wordHeaderText.Remove(0, wordHeaderText.Length);

excelHeaderText.Remove(0, wordHeaderText.Length);

headerText.Remove(0, wordHeaderText.Length);

}

#endregion

}

Hi Luke,


Thanks for sharing the details.

I
have tested the scenario and have observed that conversion process suddenly terminates and resultant PDF is 0KB. I am afraid I am unable to notice any exception message in output console. For the
sake of correction, I have separately logged it in our issue tracking system as PDFNEWNET-35980. We
will investigate this issue in details and will keep you updated on the status
of a correction. <o:p></o:p>

We apologize for your inconvenience.

The issues you have found earlier (filed as PDFNEWNET-35979;PDFNEWNET-35980) have been fixed in Aspose.Pdf for .NET 9.5.0.


This message was posted using Notification2Forum from Downloads module by Aspose Notifier.

Hi Luke,


Thanks for your patience. Your reported issue has been fixed in new DOM approach of HTML to PDF conversion. Please check following documentation link for details and code snippet.


Please feel free to contact us for any further assistance.

Best Regards,