Thanks for that Mario.
I am actually using an embedded graph in a presentation and it isnt reflected correctly until in powerpoint i choose “Edit data”. Once i do that it works fine and i see the multi level labels. I am guessing i need to call some sort of calculate or something after this? I have the column graph in a “template” pptx, which i load, I then find the graph. I then update the data. then i do this code
var chart = get chart..
chart.CategoryLabelsReference = "Sheet1!A2:B9";
chart.Axes.HorizontalCategory.MultiLevelLabels = true;
chart.Title.Text = "Chart Title";
chart.Legend.IsVisible = true;
chart.Legend.Position = ChartLegendPosition.Bottom;
Any suggestions would be greatly appreciated.
If this doesn’t make sense i can put together an example.