Virtual grid - dropdown buttons aren''t always removed when current row changes

[Simon Spruzen]

I''m using syncfusion 2.1.0.9 essential grid with the following settings:

gridStyleInfo1.ShowButtons = Syncfusion.Windows.Forms.Grid.GridShowButtons.ShowCurrentRow;

This used to work fine with 2.0.5.1, but now from time to time, the combobox cells don''t get their dropdown buttons removed when the current row changes, unless I set:

this.gridControl.RefreshCurrentCellBehavior = Syncfusion.Windows.Forms.Grid.GridRefreshCurrentCellBehavior.RefreshRow;

which I don''t want to do as it slows down rendering. In version 2.0.5.1 I could do:

gridStyleInfo1.ShowButtons = Syncfusion.Windows.Forms.Grid.GridShowButtons.ShowCurrentRow;
this.gridControl.RefreshCurrentCellBehavior = Syncfusion.Windows.Forms.Grid.GridRefreshCurrentCellBehavior.None;

and all worked fine. Any ideas?

[Administrator]

You can handle the CurrentCellMoved event. In your handler, call grid.RefreshRange, passing in GridRangeInfo.Cell(grid.CurrentCell.MoveFromRowIndex, grid.CurrentCell.MoveFromColIndex). This should just redraw the single cell.

[Simon Spruzen]

Tried this - but unfortunately the last current cell wasn''t the combo box, so it never gets refreshed. My virtual grid has two columns:

col 1 - a combobox
col 2 - an edit control.

If I click line 1 col 2, followed by line 2 col 2, the combo button in line 1 col 1 isn''t removed.

[Administrator]

In your CurrentCellMoved handler, do not use grid.CurrentCell.MveFromColIndex to decide what cell to refresh. Instead, always refresh your combobox column (just relying on grid.CurrentCell.MoveFromRowIndex to retrieve the last row).

[Simon Spruzen]

Ok will try. Is this a bug with 2.1.0.9?

[Administrator]

2.1.0.9 has the correct behavior.

Before it was refreshing the row even when the user said not to. Now it will only refresh the row when the user indicates he wants it by setting GridRefreshCurrentCellBehavior.RefreshRow.

In my previous posts, I was thinking that the old row was the one not being refreshed (leaving the button displayed when it should not be). But I now realize it may be the new row that is not shwoingteh button. If that is teh case, you can do exactly what I described above, but use grid.CurrentCell.MoveToRowIndex instead of MoveFromRowIndex.

So, if you want to use this ShowButtons = CurrentRow setting, then you will either have set the GridRefreshCurrentCellBehavior.RefreshRow property or handle some event like CurrentCellMoved and refresh the cell yourself.