public void RestorePivotGridFromFile(
    string path
)

Public Sub RestorePivotGridFromFile(
    path As String
)

Imports Microsoft.VisualBasic
Imports System.Data
Imports System.Data.OleDb
Imports System.Windows
Imports DevExpress.Xpf.PivotGrid
Imports HowToBindToMDB.NwindDataSetTableAdapters
Imports System.IO
Imports DevExpress.Xpf.Core

Namespace HowToBindToMDB
    ''' <summary>
    ''' Interaction logic for MainWindow.xaml
    ''' </summary>
    Partial Public Class MainWindow
        Inherits Window
        Private salesPersonDataTable As New NwindDataSet.SalesPersonDataTable()
        Private salesPersonDataAdapter As New SalesPersonTableAdapter()

        Public Sub New()
            InitializeComponent()
            pivotGridControl1.DataSource = salesPersonDataTable
        End Sub

        Private Sub Window_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
            salesPersonDataAdapter.Fill(salesPersonDataTable)
        End Sub

        Private Sub button1_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
            pivotGridControl1.SavePivotGridToFile("pivot.dat", True)
            pivotGridControl1.DataSource = Nothing
            pivotGridControl1.Fields.Clear()
        End Sub

        Private Sub button2_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
            If (Not File.Exists("pivot.dat")) Then
                DXMessageBox.Show("You should save the PivotGrid into a file first")
                Return
            End If
            pivotGridControl1.RestorePivotGridFromFile("pivot.dat")
        End Sub
    End Class
End Namespace

<Window x:Class="HowToBindToMDB.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxpg="http://schemas.devexpress.com/winfx/2008/xaml/pivotgrid"
        Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <dxpg:PivotGridControl dxpg:PivotSerializationOptions.RemoveOldFields="False"
                               HorizontalAlignment="Left" Name="pivotGridControl1" 
                               VerticalAlignment="Top" Margin="0,0,0,8">
            <dxpg:PivotGridControl.Fields>
                <dxpg:PivotGridField Name="fieldCountry" FieldName="Country" Area="RowArea" />
                <dxpg:PivotGridField Name="fieldCustomer" FieldName="Sales Person" Area="RowArea" 
                                     Caption="Customer" />
                <dxpg:PivotGridField Name="fieldYear" FieldName="OrderDate" Area="ColumnArea" 
                                     Caption="Year" GroupInterval="DateYear" />
                <dxpg:PivotGridField Name="fieldCategoryName" FieldName="CategoryName" 
                                     Area="ColumnArea" Caption="Product Category" />
                <dxpg:PivotGridField Name="fieldProductName" FieldName="ProductName" 
                                     Area="FilterArea" Caption="Product Name" />
                <dxpg:PivotGridField Name="fieldExtendedPrice" FieldName="Extended Price" 
                                     Area="DataArea" CellFormat="c0" />
            </dxpg:PivotGridControl.Fields>
        </dxpg:PivotGridControl>
        <StackPanel Orientation="Horizontal" Grid.Row="1">
            <Button Content="Save and unbind" Height="23" Name="button1" 
                    Grid.Row="1" Click="button1_Click" 
                    Margin="0,0,8,0" Padding="8,0,8,0" />
            <Button Content="Restore" Height="23" Name="button2" 
                    Grid.Row="1" Grid.Column="1" 
                    Click="button2_Click" 
                    Padding="8,0,8,0" />
        </StackPanel>        
    </Grid>
</Window>

using System.Data;
using System.Data.OleDb;
using System.Windows;
using DevExpress.Xpf.PivotGrid;
using HowToBindToMDB.NwindDataSetTableAdapters;
using System.IO;
using DevExpress.Xpf.Core;

namespace HowToBindToMDB {
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window {
        NwindDataSet.SalesPersonDataTable salesPersonDataTable = new NwindDataSet.SalesPersonDataTable();
        SalesPersonTableAdapter salesPersonDataAdapter = new SalesPersonTableAdapter();

        public MainWindow() {
            InitializeComponent();
            pivotGridControl1.DataSource = salesPersonDataTable;
        }

        private void Window_Loaded(object sender, RoutedEventArgs e) {
            salesPersonDataAdapter.Fill(salesPersonDataTable);
        }

        private void button1_Click(object sender, RoutedEventArgs e) {
            pivotGridControl1.SavePivotGridToFile("pivot.dat", true);
            pivotGridControl1.DataSource = null;
            pivotGridControl1.Fields.Clear();
        }

        private void button2_Click(object sender, RoutedEventArgs e) {
            if(!File.Exists("pivot.dat")) {
                DXMessageBox.Show("You should save the PivotGrid into a file first");
                return;
            }
            pivotGridControl1.RestorePivotGridFromFile("pivot.dat");
        }
    }
}