Hi Thuric,
I am afraid. I was not able to reproduce the issue. The category Labels are set correctly. Here is the test sample that I used to test this issue
http://websamples.syncfusion.com/samples/XlsIO.Web/4.4.0.51/F58330/main.htm
Here is the code snippet that I used to set CategoryLabels
[VB .NET]
Dim serieOne As IChartSerie = chart.Series(0)
serieOne.Name = "Apple"
'Category Labels
serieOne.CategoryLabels = sheet.Range("A2:A12")
Here is the screenshot of the output:
CategoryLabel.pngCould you please take a look at the sample above and kindly let me know if you still find any problem, if not could you please modify this sample so that I can reproduce the issue. This would help me in investigating this issue further.
Thanks,
Melba