Hi Lubos,
We regret very much for the delayed response. Currently we do not have any method that return after the Chart completes its rendering. However is it possible to create an custom event that could be fired after chartcontrol has completed its painting.
I have attached a simple sample that illustrates the same in this link below.
http://websamples.syncfusion.com/samples/Chart.Windows/F74917/Main.htmKindly let us know if this meets your requirement. Thanks for your patience.
Regards,
Manohari.R