Hello,
Thank you for your feedback.
I tested your code again with the Free Spire.XLS version 11.8.6, but still did not reproduce your issue. For your situation, I still suggest that you use the commercial version (the latest version is
Spire.XLS Pack (Hotfix) Version: 11.12.2) to test again. If the issue still exists after the test, please provide the following information for our reference. You could attach them here or send them to us via email (
support@e-iceblue.com). Thanks in advance.
1)Your sample Excel file.
2) Your test environment, such as OS info (E.g. Windows 7, 64-bit) and region setting (E.g. China, Chinese).
3) Your application type, such as Console app (. Net Framework 4.5).
Sincerely,
Annika
E-iceblue support team