How to: Add Unbound Fields

Aug 01, 2019
2 minutes to read

The following example shows how to add unbound fields to the ASPxPivotGrid.

The ‘DiscountAmount’ unbound field’s values are calculated using the PivotGridFieldBase.UnboundExpression property, while the ‘PriceWithDiscount’ unbound field is populated by handling the ASPxPivotGrid.CustomUnboundFieldData event.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-add-unbound-fields-e1892

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
       Inherits="AddUnboundField._Default" %>

<%@ Register Assembly="DevExpress.Web.ASPxPivotGrid.v13.1, Version=13.1.5.0,
       Culture=neutral, PublicKeyToken=b88d1754d700e49a"
       Namespace="DevExpress.Web.ASPxPivotGrid"
       TagPrefix="dx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <dx:ASPxPivotGrid ID="ASPxPivotGrid1" runat="server" DataSourceID="AccessDataSource1"
             OnCustomUnboundFieldData="CustomUnboundFieldData">
            <Fields>
                <dx:PivotGridField ID="fieldSalesperson" Area="RowArea"
                      AreaIndex="0" FieldName="Salesperson">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldCountry" Area="ColumnArea"
                      AreaIndex="0" FieldName="Country">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldExtendedPrice" Area="DataArea"
                      AreaIndex="0" FieldName="ExtendedPrice">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldDiscount" Area="DataArea"
                      AreaIndex="1" FieldName="Discount">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldDiscountAmount" Area="DataArea"
                      UnboundExpression="[ExtendedPrice]*[Discount]"
                      AreaIndex="2" UnboundType="Decimal"
                      Caption="Discount Amount">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldPriceWithDiscount" Area="DataArea"
                      AreaIndex="3" UnboundType="Decimal"
                      FieldName="PriceWithDiscount"
                      Caption="Price with Discount">
                </dx:PivotGridField>
            </Fields>
        </dx:ASPxPivotGrid>
        <asp:AccessDataSource ID="AccessDataSource1" runat="server"
                DataFile="~/App_Data/nwind.mdb"
                SelectCommand="SELECT [Salesperson], [Country],
                       [ExtendedPrice], [Discount]
                       FROM [Invoices]">
        </asp:AccessDataSource>
    </div>
    </form>
</body>
</html>

using System;
using System.Web.UI;
using DevExpress.Web.ASPxPivotGrid;

namespace AddUnboundField {
    public partial class _Default : Page {
        protected void Page_Load(object sender, EventArgs e) {
        }
        protected void CustomUnboundFieldData(object sender, CustomFieldDataEventArgs e) {
            if (e.Field.FieldName != "PriceWithDiscount") return;
            decimal extPrice = Convert.ToDecimal(e.GetListSourceColumnValue("ExtendedPrice"));
            decimal discount = Convert.ToDecimal(e.GetListSourceColumnValue("Discount"));
            e.Value = extPrice * (1 - discount);
        }
    }
}

<%@ Page Language="vb" AutoEventWireup="true" CodeBehind="Default.aspx.vb"
       Inherits="AddUnboundField._Default" %>

<%@ Register Assembly="DevExpress.Web.ASPxPivotGrid.v13.1, Version=13.1.4.0,
       Culture=neutral, PublicKeyToken=b88d1754d700e49a"
       Namespace="DevExpress.Web.ASPxPivotGrid"
       TagPrefix="dx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <dx:ASPxPivotGrid ID="ASPxPivotGrid1" runat="server" DataSourceID="AccessDataSource1"
             OnCustomUnboundFieldData="CustomUnboundFieldData">
            <Fields>
                <dx:PivotGridField ID="fieldSalesperson" Area="RowArea"
                      AreaIndex="0" FieldName="Salesperson">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldCountry" Area="ColumnArea"
                      AreaIndex="0" FieldName="Country">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldExtendedPrice" Area="DataArea"
                      AreaIndex="0" FieldName="ExtendedPrice">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldDiscount" Area="DataArea"
                      AreaIndex="1" FieldName="Discount">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldDiscountAmount" Area="DataArea"
                      UnboundExpression="[ExtendedPrice]*[Discount]"
                      AreaIndex="2" UnboundType="Decimal"
                      Caption="Discount Amount">
                </dx:PivotGridField>
                <dx:PivotGridField ID="fieldPriceWithDiscount" Area="DataArea"
                      AreaIndex="3" UnboundType="Decimal"
                      FieldName="PriceWithDiscount"
                      Caption="Price with Discount">
                </dx:PivotGridField>
            </Fields>
        </dx:ASPxPivotGrid>
        <asp:AccessDataSource ID="AccessDataSource1" runat="server"
                DataFile="~/App_Data/nwind.mdb"
                SelectCommand="SELECT [Salesperson], [Country],
                       [ExtendedPrice], [Discount]
                       FROM [Invoices]">
        </asp:AccessDataSource>
    </div>
    </form>
</body>
</html>

Imports Microsoft.VisualBasic
Imports System
Imports System.Web.UI
Imports DevExpress.Web.ASPxPivotGrid

Namespace AddUnboundField
    Partial Public Class _Default
        Inherits Page
        Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        End Sub
        Protected Sub CustomUnboundFieldData(ByVal sender As Object, ByVal e As CustomFieldDataEventArgs)
            If e.Field.FieldName <> "PriceWithDiscount" Then
                Return
            End If
            Dim extPrice As Decimal = Convert.ToDecimal(e.GetListSourceColumnValue("ExtendedPrice"))
            Dim discount As Decimal = Convert.ToDecimal(e.GetListSourceColumnValue("Discount"))
            e.Value = extPrice * (1 - discount)
        End Sub
    End Class
End Namespace

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