Thank you for reporting the said problem. We are able to observe the problem of combo boxes when rendering the worksheet to image. We have noticed that the SheetRender is ignoring the selected value of combo boxes while using the latest version of Aspose.Cells for .NET 7.7.1. A ticket (CELLSNET-42294) has been logged to further investigate the said issue, and to provide a fix at earliest. Please spare us little time to isolate the problem cause on our end. In the meanwhile, we will keep you posted with updates in this regard.
Thanks for using Aspose.Cells.
We have fixed this issue.
Please download and try the latest version: Aspose.Cells
for .NET v188.8.131.52 and let us know your feedback.