Initializing PdfHTMLTextElement with a long string crashes .NET Core API

Question

Here is what I'm doing: for (var i = 0; i < someVariable.Count; i++){ htmlText = $"{htmlText} {i + 1}. {someVariable[i]}
";}PdfHTMLTextElement richTextElement = new PdfHTMLTextElement(htmlText, font, PdfBrushes.Black);Initalizing the PdfHTMLTextElement crashes the app without any warning. I tried a string that was less than 100 words and it worked fine but causes an error after a certain amount of characters.Any solutions?

Gowthamraj Kumar · Accepted Answer

Hi Daniel, 
 
Thank you for sharing the details. 
 
We have checked the reported crashing issue with provided details on our end, but it generates the PDF document without any error. We have modified the sample with provided input texts for your reference. We have attached the sample and output document for your reference. Kindly please try the below sample on your end and let us know the result.    
  
Sample: https://www.syncfusion.com/downloads/support/forum/165747/ze/NetCoreSample-650545891 
Document: https://www.syncfusion.com/downloads/support/forum/165747/ze/Document-277222379 
    
If still, you are facing the same issue, we can have a web meeting to directly look into the issue in your machine and reproduce the issue and provided solution at the earliest. Please let us know your availability for a web meeting, we will make every effort to have this scheduled at a time of your convenience. 
 
Note: We work in IST hours. 
 
Regards, 
Gowthamraj K

Daniel Xu · Answer

I tried this and crashes as well. htmlText += "fdasfsadfasdagfgd
"; htmlText += "gdfgsfdf
"; htmlText += "fdasfdfsdafd
"; htmlText += "fadfsdfasdhfdgd
"; htmlText += "123123adfadsf
"; htmlText += "dfasfdfadfsad
"; htmlText += "TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST
"; htmlText += "124123
"; htmlText += "123
"; htmlText += "123
"; htmlText += "1234
";

Daniel Xu · Answer

I'm sorry its not crashing while initalizing PdfHtmlTextElement, its actually crashes when calling the Draw method.

richTextElement.Draw(page, new Syncfusion.Drawing.RectangleF(0, 20, page.GetClientSize().Width, page.GetClientSize().Height), format);

Thanks

Gowthamraj Kumar · Answer

Hi Daniel, 
 
Thank you for contacting Syncfusion support. 
 
We have tried to reproduce the reported crashing issue with provided details on our end, but it generates the PDF document with provided HTML text properly. We have attached the sample with the latest Volume version (19.1.0.63) and output document for your reference. Kindly please try the below sample on your end and let us know the result.   
 
Sample: https://www.syncfusion.com/downloads/support/forum/165747/ze/NetCoreSample976090607    
Document: https://www.syncfusion.com/downloads/support/forum/165747/pd/Sample-1846034254    
   
Please refer to the below links for more information,   
UG: https://help.syncfusion.com/file-formats/pdf/working-with-text#adding-a-html-styled-text    
   
If still, you are facing the same issue, kindly share with us the complete code snippet, product version, Environment details such as (OS, RAM, processor, culture settings, etc.) to check the issue on our end. So that, it will be helpful for us to analyze and assist you further on this.   
 
Regards, 
Gowthamraj K

Daniel Xu · Answer

The example doesn't work if I change the htmlText variable to:

string htmlText = string.Empty;

htmlText += "fdasfsadfasdagfgd
";

htmlText += "gdfgsfdf
";

htmlText += "fdasfdfsdafd
";

htmlText += "fadfsdfasdhfdgd
";

htmlText += "123123adfadsf
";

htmlText += "dfasfdfadfsad
";

htmlText += "TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST
";

htmlText += "124123
";

htmlText += "123
";

htmlText += "1234
";

This creates a stackoverflow error which definately doesn't exceed the number of characters in a single pdf page. Also PdfLayoutType.Paginate should of paginated any overflowing text to the next page.

I'm running on Windows 10 64 bit PRO, Syncfusion Essential Studio 19.1.10.54, Intel i7-8700, 32GB RAM, English

Daniel Xu · Answer

This is basically what I'm doing:private void GenerateAdditionalBusinessNamePages(ref MemoryStream stream, List processedBusinessNameIndexes){ var fbnFilingData = ["TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST , TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST", "TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST, TEST"] var document = new PdfDocument(); document.PageSettings.Size = PdfPageSize.Legal; var page = document.Pages.Add(); var font = new PdfStandardFont(PdfFontFamily.TimesRoman, 12); var htmlText = ""; foreach (var item in fbnFilingData) { htmlText = $"{htmlText} ${item}
" } var richTextElement = new PdfHTMLTextElement(htmlText, font, PdfBrushes.Black); var format = new PdfLayoutFormat(); format.Layout = PdfLayoutType.Paginate; format.Break = PdfLayoutBreakType.FitElement; richTextElement.Draw(page, new Syncfusion.Drawing.RectangleF(0, 5, page.GetClientSize().Width, page.GetClientSize().Height), format); var attachedFormStream = new MemoryStream(); document.Save(attachedFormStream); attachedFormStream.Position = 0; document.Close(true); stream = attachedFormStream;}