SalesMasterDetailInfoModel salesMasterDetailInfo = new SalesMasterDetailInfoModel();
                SalesEntryCollection.Clear();
                SalesEntryCollection.Add(salesMasterDetailInfo);

DataGridRow currentRow = dvSalesEntryDataGrid.ItemContainerGenerator.ContainerFromItem(dvSalesEntryDataGrid.CurrentItem) as DataGridRow;

DataGridCell cell = Helper.Helper.GetCell(dvSalesEntryDataGrid, currentRow, 1);
                            if (cell != null)
                            {
                                dvSalesEntryDataGrid.CurrentCell = new DataGridCellInfo(cell);
                            }