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Hello,
I have a dropdown grouping control in a gdbg.
Not all rows have such cell type, but even those that have, every cell have its own set of values. So, it would take too long to prepare all dropdowns at once. So far, I have implemented it in a virtual gridgroupingcontrol with an idea to fill in the data upon clicking the drop button on a parent grid cell, but have a problem when clicking it - it throws and exception on a null reference, so I am wandering at what point do I have to fill in the data
Could anyone suggest what whould be the best way to implement such dropdown control, epecially with respect to the data fill.
