ResetVolatileData and how can I know when its called

[Sue Harris]

Hi,

I want to hold an additional cache of data about my virtual grid in a override class of the GridControl, and whenever the volatile data is reset (via the ResetVolatileData method), I want to also reset my data cache. I noticed in the code that there was a NotifyResetVolatileData event, but it is internal not public or protected. Do you have any suggestions on how I can know when to reset my caches?

Thanks,
Sue

[Administrator]

Hi Sue,

if you look at the ResetVolatileData code you also see these lines:

			if (gridVolatileData != null)
				gridVolatileData.Clear();

This is where you can implement a hook. VolatileData is a object that you can replace.

What you should do is derive a class from GridVolatileData and override its Clear method.

You need to assign a instance of your derived volatile data object to the GridModel.VolatileData property.

Stefan