choosing a hi-perf tree

[hemant]

hi,
i have the following requirements:

- to display a hierachical data structure (4 levels deep) with upto 25000 records.
- the data will be recalculated (or repainted) every 1 second.
- new records may be added every 30 seconds.

given these requirements, which control should i use? grouping, hierchical, virt tree (a lot of work), or tree adv data bound?

regards

[Administrator]

I think your reasonable choices are between a GridDataBoundGrid and a GridGroupingControl. The GridDataBoundGrid is lighter weight and for this reason would perform a little better than a GridGroupingCOntrol, but the mention of the requirement of adding rows is a plus for using the GridGroupingControl. The GridGroupingControl will automatically reflect the new rows. This is not the case with the GridDataBoundGrid. There you will have expand/collapse (can be done ''silently'') to display the new data, and this is extra work.

I would set up a test program that has a dataset with the datacase that you want to measure performance. Then you can easily swap in/out either grid to see what basic performance you get out of the box before you start trying to optimize things for a particular grid.

[Administrator]

hi,
i''m finding that the performance in grouping control is poor. i haven''t tried the grid control yet.

i may have to reducethe paints, as the updates are too many right now.

1) is there any way to prevent to grid from painting?

2) is there a virtual hierachical control ?

regards

[Administrator]

does suspendlayout work if you wish to selectively block painting on data changes?