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Error "Unreadable Content" while opening excel file

Thread ID:





129247 Mar 7,2017 03:42 AM Mar 8,2017 10:10 AM ASP.NET Web Forms 2
Tags: XlsIO
gaurav singh
Asked On March 7, 2017 03:42 AM


I am creating excel file from datatable using  worksheet.ImportDataTable(dtExport, True, 1, 1, True) method. But we have some non printable character (ASCII value is 6,10,20,21,22,23,24,25 and 26 etc) in our database. Excel file is created successfully but when trying to open it giving error "Unreadable content" and after clicking yes giving illegal xml character.  But when we are directly  copy content to excel file and save then open ms excel not giving any error. 

I am attaching demo project having excel file in temp folder.  We are using 6.402.0.15 version of syncfusion dll.

So is there any way to fix this issue.

Please help me out 

Thanks in advance.

Attachment: ExcelDemo_cfa93051.zip

Sridhar Sukumar [Syncfusion]
Replied On March 8, 2017 06:58 AM

Hi Gaurav, 
Thank you for contacting Syncfusion support. 
We are able to reproduce the issue and it has been fixed in our latest version 15.1. We strongly recommend you to upgrade to our latest version ( of Essential Studio which has more improvements and enhancements which is available for download under the following link. 
Please let us know if you have any concern. 
Sridhar S. 

gaurav singh
Replied On March 8, 2017 10:10 AM

Hi Sridhar,

Thanks for your response. 

I just want to ask  Is there another way to handle this issue without upgrading syncfusion dlls?



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