This works perfectly when I use the Microsoft.Interop. But my slide disappears when I try to do the same thing with Spire.
I commented out the code more and more. It is down to a single line, and my slide is still disappearing. No exceptions, no errors.
Problem:
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I have a PPT document saved in PPTX 2007 format. The chart has already data in it. 200 rows of data, accross 6 time series. The first column is DateTime . The rest of the columns are numeric. I am not changing the data.
I execute this single line and after I save the PPTX, the slide comes back completely empty. The charts, tables, etc on the slide are all gone.
chart.Categories.CategoryLabels = chart.ChartData["A2", "A30"];