I have some problems with DataGrid. When the DataGrid is set to CanUserAddRows a new black row is placed at the bottom of the DataGrid but these row have an unexpected behavior because if I just clik the new row and pass the focus to another cell the row is created even when it is empty. I would like to change the behavior by veryfing if the row is empty avoid the creation of new item but if in the event RowEditEnding I set e.Cancel=true, then the NewItemPlaceHolder desapears and I can not add any row since then. Any body has found the answer for these problem?

protected override void OnRowEditEnding(DataGridRowEditEndingEventArgs e)
{
    if ((e.Row.Item as DataRowView).Row.ItemArray[0] == null || (e.Row.Item as DataRowView).Row.ItemArray[0].ToString() == String.Empty)
    {
        e.Cancel = true;

        IEditableCollectionView collection = Items as IEditableCollectionView;

        if (collection.IsAddingNew)
        {
            collection.CancelNew();
        }
    }            
    base.OnRowEditEnding(e);
}