We decided to use StrataFrame components because they are very pleasant to use.

I will try this and I'll tell you what will happen.

I am afraid you gave Infragistics the excuse to ignore your problem by simply mentioning Strataframe. Their support is not as helpful as here and you are not even guaranteed a response. But mentioning SF has simply given them an opt-out which they have taken.

Why don't you create a separate test form and create a dataset that duplicates what you are trying to do with the SF BO? This way you would simply be binding the grid directly to a pure .NET dataset and Strataframe would be removed from the equation. If you still get 6 or 7 seconds to load the grid then at least you know your problem is in the grid configuration itself.

Aaron

My problem is that when I load 20 000 records on a windows datagrid, it takes 600 milliseconds
And when I do the same with the infragistics grid, the loading are slow, it takes about between 6 and 7 seconds.
I wonder why there is a such difference.

Regards,

David

They know who we are and that is just a post from someone who doesn't feel like dealing with your problem.  We actually have a relationship with them...so that is some low-level person posting on the thread....but let's back up.  I don't understand why you are having any issues here as the Infragistics grid is a highly used grid...including by us within our medical software.  Based on your last post and your screen shot...I did not know that you still had a problem...so what is your problem?

I had a response and they said that to me :

"Additionally, Infragistics has not tested the use of NetAdvantage for .NET with the StrataFrame framework.  We are unfamiliar with what it is or what it is supposed to do.  We may not be able to provide support for the use of NetAdvantage for .NET controls with this framework, unless the same problem can be duplicated without this third-party tool."

So what can I do now ?

David

I send you a screen copy of my grid. For me, it's a normal grid. I set no extra options, only the basic.

David

I think many of my grids will have to need to be sorted or have summary.

I was happy of my discovery this morning but I will go on my searchs.

Personally I don't use LoadOnDemand as I have grid sorts/filters already setup and I frequently use row summaries which means all rows have to be loaded. When that is the case the grid will override LoadOnDemand and will enforce the pre-loading of all rows - so you will need to be careful as your grid will switch back to preloading all rows if you enable any grid feature that requires all rows to be loaded.

If you notice a drop in grid performance in the future then it is likely a feature has been enabled that requires all rows and the grid will ignore your LoadOnDemand setting.

Aaron