LightningChart Support Forums

When using LightningGraph in Windows Applications, it works. When using it in a class library with WinForm, it works. When using it in a class library with WPF, I am seeing all black with a red message "No valid license available".

This is even though I am correctly calling LightningChart.SetDeploymentKey before using the graphs, and all graphs shown outside of the class library (directly in the main application) work fine. Any clue?

This particular message may be shown, if LightningChart skipped license check for some reason. For example, it may happen if Chart is never attached to a loaded element tree and chart is not in Headless Mode.

Hello ArcctionKestutis

Thank you for sharing this , but if it is the case that LightningChart skips the license check for unknown reasons , what is the best solution ?

The best solution - contact Support by email and share your case.