Right! Now that we ve established that you have version 6.3, I ve hopefully got a solution for you. I don t have 6.3 myself, but I ve got a slightly later one that I think didn t have Virtual Scrolling added as a feature yet.

So try this code:

webgrid.DisplayLayout.XmlLoadOnDemandType = XmlLoadOnDemandType.Virtual;

This should automatically put a tooltip on the grid as you scroll down. Have a look here for a running sample... (and remember to choose the virtual option)

Here s hoping!

Rob G

I don t know if there s a UltraWebGrid property to simply turn on the behavior you re looking for. I almost suspect you experienced this feature in another application, perhaps not even a web based one (sorry!). I do however, know exactly what you re talking about.

As a work-around, I would suggest allowing the user to input the destination row number, and to simply "jump" to it, using this technique.

If that doesn t satisfy you, it may be possible to achieve this behavior with JavaScript. You would need to use something like this technique to get the information you need, estimate (or actually detect, if possible) the row number, and the rest is up to the GUI. I would go with the work-around described above though :)

I m typing this from memory here as I don t have it installed on this machine and I haven t seen that setting before, but how about adding something like this to the InitializeRow event:

foreach (UltraGridCell cell in e.Row.Cells)
{
    if(cell.Column.Key == "Topic") //from your grid above
       cell.Title = cell.Row.Index;
}

The row object itself does not have a "Title" property from memory, but the cell does.

See if that works...

Regards,
Rob G

OK - I think I ve found your illusive setting:

You can set the TipStyleScroll on the Override to Show on the Grid (this may be version dependant).

You can determine which field is displayed as the tooltip by using the ScrollTipField property of the band.

I did it like so:

        myGrid.DisplayLayout.Override.TipStyleScroll = TipStyle.Show;
        myTopBand.ScrollTipField = "Id";

...and it works like a charm!

If it s a really long list, sometimes setting the ScrollStyle to Deferred helps:

        myGrid.DisplayLayout.ScrollStyle = ScrollStyle.Deferred;

Hope that helps...

Rob G

Once again - not sure which version you have, so to be safe here s somthing you can try from 2009 version:

myGrid.Behaviors.VirtualScrolling.Enabled = true;
myGrid.Behaviors.VirtualScrolling.TooltipVisibility = DefaultableBoolean.True;

If your scrolling mode is Deferred instead of Virtual, then the tooltip is normally enabled by default.

You can find full details about this feature here

Hope that helps,

Rob G