How to: Create Total Summaries
The following example calculates the average price and displays it in the ASPxCardView’s summary panel:
ASPxCardViewSummaryItem totalSummary = new ASPxCardViewSummaryItem();
totalSummary.FieldName = "UnitPrice";
totalSummary.SummaryType = DevExpress.Data.SummaryItemType.Average;
ASPxCardView1.TotalSummary.Add(totalSummary);