I am using Aspose Slides version 16.1.0.0 to create a pie chart on the fly. Is there anyway to set custom value for data labels? I couldnt find a way to do it in the library. Within PPT, you can do this by selecting “Value from Cells” and select a range and it will be displayed in the chart. Attaching a screenshot of how to achieve that in PPT. Please let me know.
I have observed your requirements and like to share that you can set the chart data labels from chart workbook and can also set labels with custom text as well. I suggest you to please visit following documentation links.