I also have this issue. I agree there is no way to prevent the currentManager from activating a particular row, but in this case it's the user that is activating the row not the CurrencyManager. There should be a way to cancel the user event of the row being activated. One thing I've thought of but haven't tried is to handle the BeforeSelectChange event(which is also called during activation) and if you want to cancel the row activation simple re-active the old row. Would this work?

You can prevent row activation by responding to the AfterRowActivate event.

I am using a binding source and this seems to work for me (I get no flicker):

private UltraGridRow _activeRow = null;
public UltraGridRow ActiveRow {
 get { return _activeRow; }
 set { _activeRow = value; }
}

private bool _cancelActivate = false;
private bool CancelActivate {
 get { return _cancelActivate; }
 set { _cancelActivate = value; }
}

private void gridInvestors_AfterRowActivate(object sender, EventArgs e) {
 if (ActiveRow != null && CancelActivate) {
  gridInvestors.ActiveRow = ActiveRow;
 }
 ActiveRow = gridInvestors.ActiveRow;
}

Okay, but just to be clear, this does not actually prevent the activation of the row, it just activates some other row after the row has already been activated.

If you do not want a particular row in the grid to be activated, you should use the Activation property on the row to disable it.  

My scenario is the following:

I am using the Grid to select rows, and then displaying their contents on a details panel. The user can then make changes to the data at which point it switches into an Edit state. In this state the user can then try to select a different row. If they do this I display a message that they are currently editing the active row and that they can cancel the changes or continue editing the current row. If they cancel the new row is selected and if they continue editing the old row remains selected. Of course I could just disable the entire grid in this scenario, but they still need to be able to sort, group etc.

So what is the best solution for this scenario? Is it to set the Activation property for every row to false if my screen switches to edit mode? If so can I still recieve a notification that a new row is trying to be activated to prompt a dialog? If they choose 'Cancel' in this dialog can the selected row be re-enabled and selected within the notification?

Even if this is possible it does seem a little easier to simply have a Cancel property in the BeforeRowActivate event handler. This would signify that you want to cancel(but still handle) the user event of clicking on a new row(just as BeforeSelectChange currently does). I got the BeforeSelectChange solution I mentioned earlier to work. It also re-activates the previously active row, but this seems to do the trick.

ksedlazek,

I had this requirement as well, and solved it the same way.

Thanks from me too!

Thanks ksedlazek

I was able to solve my problem using your suggestion. It avoided keeping track of previously activated rows.

You can trap the BeforeRowDeactivate event and cancel it leaving the same active row.  This will happen prior to BeforeRowActivate on the row that was attempted to be activated.