public QuoteLineItemEditorViewModel()
        {
            Lines = new EntityDataViewModel(10, typeof(QuoteDetail), false);

            Lines.OnSelectedRowsChanged += OnSelectedRowsChanged;
            Lines.FetchXml = @"<fetch version='1.0' output-format='xml-platform' mapping='logical' returntotalrecordcount='true' no-lock='true' distinct='false' count='{0}' paging-cookie='{1}' page='{2}'>
                              <entity name='quotedetail'>
                                <attribute name='productid' />
                                <attribute name='productdescription' />
                                <attribute name='priceperunit' />
                                <attribute name='quantity' />
                                <attribute name='extendedamount' />
                                <attribute name='quotedetailid' />
                                <attribute name='isproductoverridden' />
                                <attribute name='ispriceoverridden' />
                                <attribute name='manualdiscountamount' />
                                <attribute name='lineitemnumber' />
                                <attribute name='description' />
                                <attribute name='transactioncurrencyid' />
                                <attribute name='baseamount' />
                                <attribute name='requestdeliveryby' />
                                <attribute name='salesrepid' />
                                <attribute name='uomid' />
                                {3}
                                <link-entity name='quote' from='quoteid' to='quoteid' alias='ac'>
                                  <filter type='and'>
                                    <condition attribute='quoteid' operator='eq' uiname='tes' uitype='quote' value='" + GetQuoteId() + @"' />
                                  </filter>
                                </link-entity>
                              </entity>
                            </fetch>";

            Lines.SortBy(new SortCol("lineitemnumber", true));
            Lines.NewItemFactory = NewLineFactory;
            QuoteDetailValidation.Register(Lines.ValidationBinder);
            SelectedQuoteDetail.SetValue(new ObservableQuoteDetail());

        }