Hi,

i have the same problem as nranga shown in the msg before.

I implemented a class based on iCustomSummaryCalculator. In the 'AggregateCustomSummary' i add only when row.selected is true. It doesn't work.

The SummaryCalculator will only reached one-times after filling the grid (I set a stop at BeginCustomSummary), but not when i select a row ore also more rows.

I assumed that the SummaryCalculator will start to recalculate after changing selection. But it isn't. 

How can I initialize the recalculating, maybe from after selectchanged event or similiar.

Any help is welcomed.

Wolfgang

Hi Wolfgang,

There's no way for the grid to know what your ICustomSummaryCalculator is doing. It does not know that you are basing the summary on selection. So it does not automatically recalculate the summaries when the selection changes.

So you just have to tell it when the summaries need to be recaculated. Like so:

        private void ultraGrid1_AfterSelectChange(object sender, AfterSelectChangeEventArgs e)
        {
            UltraGrid grid = (UltraGrid)sender;
            grid.DisplayLayout.RefreshSummaries();
        }

Hi Mike,

thanks for your answer.

I tried it, but after  .RefreshSummaries nothing happens.

I see following behaviour: When i have a table with many lines (more as on screen has space)  and the summary lines on the bottom are not visible, then can i mark some lines. I scroll now down that the summaries are come visible and the right value is in the summary field. The summarycalculator will be reached (i had a stop on BeginCustomSummary in debug)  when the summaryfields are coming visible on screen. When i now change the selection one more, then event afterselectchange will be fired, but the RefreshSummaries  don't reach the BeginCustomSummary. 

What could i do wrong?

By the way another question: Is it possible show the Summarylines everytimes on the visible part from the grid (on the first page) like the addnew-line?

I hope, you have some tips for me.

Best Regard from Munich

Wolfgang

PS: I use VB.net VS2010 and tried it with Infragistics 10.1 and also 10.2

Hi,

Sorry, this was my mistake. The RefreshSummaries method only applies to summaries that were added or removed.

To force a recalculation of a summary, you would do this:

            UltraGrid grid = (UltraGrid)sender;
            grid.DisplayLayout.Bands[0].Summaries[0].Refresh();     

I used index 0 here, but obviously you will want to use the index, or more likely the Key, of the summary you need to refresh.

ewg said:

By the way another question: Is it possible show the Summarylines everytimes on the visible part from the grid (on the first page) like the addnew-line?

Yes, you can do this using the SummaryDisplayArea property on the Override object. This is a flagged enumeration, so you can specify mutliple areas.

In your case, you will want to use TopFixed or BottomFixed in addition to any other areas you want to the summaries to appear in.

Hi Mike,

thank you for your fast answer. Now work all fine and the customer is satisfied.

Wolfgang