private void xamDataGrid1_CellActivating(object sender, Infragistics.Windows.DataPresenter.Events.CellActivatingEventArgs e)
        {
            //Find the GridViewPanel
            DependencyObject gv = Infragistics.Windows.Utilities.GetDescendantFromType((DependencyObject)e.Cell.DataPresenter, typeof(GridViewPanel), false);
            //Find dataRecord in grid view that is the same as active row
            DataRecord d = (DataRecord)e.Cell.Record;

            //Get DataRecord Presenter that represents current active record
            DependencyObject depRecPrstr = Infragistics.Windows.Utilities.GetDescendantFromType(gv, false, new Infragistics.Windows.Utilities.DependencyObjectSearchCallback<DataRecordPresenter>(descendentCallbackDataRecordPresenter));
            
            //Find the xamCombo
            if (depRecPrstr != null)
            {
                DependencyObject depXamCombo = Infragistics.Windows.Utilities.GetDescendantFromType(depRecPrstr, typeof(XamComboEditor), false);
                if (depXamCombo != null)
                {
                    XamComboEditor ce = (XamComboEditor)depXamCombo;

                    if (ce.Tag == null || (ce.Tag is bool && (bool)ce.Tag))
                    {
                        ObservableCollection<Task> newCol = new ObservableCollection<Task>();

                        DataRowView dr = (DataRowView)d.DataItem;
                        DAL.DataSetPrjCustFields.vDCS_ProjectLineDCSCustomFieldsRow prjLine = (DAL.DataSetPrjCustFields.vDCS_ProjectLineDCSCustomFieldsRow)dr.Row;

                        foreach (Task task in TaskView)
                        {
                            switch (prjLine.ResourceType)
                            {
                                case "V":
                                    if (task.TaskNumber.EndsWith("C"))
                                        newCol.Add(task);
                                    break;
                                case "E":
                                    if (task.TaskNumber.EndsWith("E"))
                                        newCol.Add(task);
                                    break;
                                default:
                                    break;
                            }

                        }

                        ComboBoxItemsProvider newProvider = new ComboBoxItemsProvider();
                        newProvider.DisplayMemberPath = "TaskNumber";
                        newProvider.ValuePath = "intTaskKey";
                        newProvider.ItemsSource = newCol;

                        ce.ItemsProvider = newProvider;
                        ce.Tag = false;
                    }
                }
            }
        }

        public bool descendentCallbackDataRecordPresenter(DataRecordPresenter drp)
        {
            DataRecord d = (DataRecord)xamDataGrid1.ActiveRecord;

            return drp.DataRecord == d;
        }