GGC, multiselect rows with mouse only

[John H]

Hi,
Which event should I use to detect when the user has multi selected rows in a GGC without using the keyboard? E.g. the user clicks a row and drags down which selects 2 or more rows, and then releases the left mouse button.

Thanks
John

[Administrator]

Are you using the record selection support specific to GridGroupingControl? (ie,

this.gridGroupingControl1.TableOptions.AllowSelection = GridSelectionFlags.None;
            this.gridGroupingControl1.TableOptions.ListBoxSelectionMode = SelectionMode.MultiExtended;

)

If so, you can use the SelectedRecordsChanging and SelectedRecordsChanged events.

[John H]

Thanks Clay,
Another question for you though, why does SelectedRecordsChanged event get called multiple times? Even selecting a single row calls the event 5 times, 4 times with e.Table.SelectedRecords containing 0 records, and once with an add for the selected record.
When selecting multiple rows an add event is triggered for each row, I just want to know the rows that are selected and act upon it. How do I do this?

Thanks
John

[Administrator]

The RecordChanged event is called when the collection is modified. To see what is going on, you check the e.Action member of the event args. Normally, when you click on a row and start to drag, you see the event hit twice, once with e.Action = Reset and once with e.Action = Add. Then as you select more rows with your drag, you see more events with e.Action = Add.

I do not know of a simple way just to get all the selections at once. To do this this, I think you will have to replace the default selection mouse controller with your own. This will take some coding.