Why not just fire the MeasureRow and the MeasurePreviewItem events if you only need to measure the rows? I cannot understand why you need to fire the BeforeDrawRaw event to measure the height of the rows if the user won't return any information about that (the height of the row).

 

    On the other hand, if you need to fire it also for measuring the rows, could you include any parameter (or another resource, like a property we can read) to inform us that the event is being fired just for measuring purposes? Think that this event (BeforeDrawRow) is often used to perform some heavy operations (searching data to draw text, etc.) that we can ignore if we could know that the row won't really be drawn after the event. This is the main reason, at least for me, why the performance is bad :-)

 

    Kind regards,

 

F.José Sen

 

    Also, I would like to know if someone from Codejock Support Team will answer to this topic any time.

 

    Kind regards,

 

F.José Sen

    Can you say me anything about this? It would be enought for me now just to know if the row is going to be really drawn during the BeforeDrawRow event handler or not (just called to meaure it).

 

    Kind regards,

 

F.José Sen

 

    Exactly. Perhaps you could fire only the MeasureRow and the MeasurePreviewItem events if you just need to calculate the heights of the rows.

 

    Meanwhile, is there any way to know (inside the BeforeDrawRow event handler) if the row is going to be drawn or if it is called just to perform the measurement of the row? I've been playing with "TopRowIndex" control property but it always returns 0 (inside BeforeDrawRow handler). This could help to determine if the row will be drawn or not (to avoid data searches, etc.).