How to: Display Underlying Records

  • 4 minutes to read

This example demonstrates how to obtain the records from the control's underlying data source for a particular cell. Double-click a cell to invoke a form that contains a grid to show the underlying data.

NOTE

The complete sample project How to: Display Underlying (Drill-Down) Records is available in the DevExpress Examples repository.

The primary data source is the Northwind database contained in the SQL Server data file NW.mdf. The application can use the BindingSource component or the LinqServerModeDataSource instance to retrieve the data from the database. A LinqServerModeDataSource data source is a queryable data source, and it forces the PivotGrid to operate in server mode. Click the Server Mode toggle switch control to switch from one data source to another.

When you double-click the PivotGrid cell, the PivotGridControl.CellDoubleClick event occurs. The following CreateDrillDownDataSource method overrides are called to obtain the list of records associated with the selected cell:

You can also click the Get Grand Total Data button to call the PivotGridControl.CreateDrillDownDataSource method and display all data records that the PivotGridControl uses to show the summarized data.

screenshot

using DevExpress.XtraEditors;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraPivotGrid;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace DrillDownDataSourceExample
{
    public partial class Form1 : DevExpress.XtraEditors.XtraForm
    {
        bool serverMode = false;
        public Form1()
        {
            InitializeComponent();
            pivotGridControl1.CellDoubleClick += PivotGridControl1_CellDoubleClick;
            // This line of code is generated by Data Source Configuration Wizard
            linqServerModeSource1.QueryableSource = new DrillDownDataSourceExample.DataClasses1DataContext().Invoices;
        }

        private void PivotGridControl1_CellDoubleClick(object sender, DevExpress.XtraPivotGrid.PivotCellEventArgs e)
        {
            PivotDrillDownDataSource drillDownDataSource;
            if (serverMode)
               drillDownDataSource = e.CreateDrillDownDataSource(25, new List<string> { "ShipName" });
            else
                drillDownDataSource = e.CreateDrillDownDataSource(25);
            XtraForm dataform = CreateDrillDownForm(drillDownDataSource);
            dataform.ShowDialog();
            dataform.Dispose();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'nWDataSet.Invoices' table. You can move, or remove it, as needed.
            this.invoicesTableAdapter.Fill(this.nWDataSet.Invoices);
            SetPivotGridDataSource();
        }

        private XtraForm CreateDrillDownForm(PivotDrillDownDataSource dataSource) {
            XtraForm form = new XtraForm();
            GridControl grid = new GridControl();
            grid.Parent = form;
            grid.Dock = DockStyle.Fill;
            grid.DataSource = dataSource;
            grid.DataSource =
            form.Bounds = new Rectangle(100, 100, 800, 400);
            GridView gridView1 = new GridView();
            grid.MainView = gridView1;
            gridView1.Columns["OrderDate"].DisplayFormat.FormatType = DevExpress.Utils.FormatType.DateTime;
            form.Text = string.Format("Underlying Data - {0} Records", dataSource.RowCount);
            return form;
        }

        private void toggleSwitch1_Toggled(object sender, EventArgs e)
        {
            serverMode = ((ToggleSwitch)sender).IsOn;
            SetPivotGridDataSource();
        }

        private void SetPivotGridDataSource()
        {
            if (serverMode)
                pivotGridControl1.DataSource = linqServerModeSource1;
            else
                pivotGridControl1.DataSource = invoicesBindingSource;
        }

        private void btnGrandTotal_Click(object sender, EventArgs e)
        {
            PivotDrillDownDataSource drillDownDataSource = pivotGridControl1.CreateDrillDownDataSource();
            Form dataform = CreateDrillDownForm(drillDownDataSource);
            dataform.ShowDialog();
            dataform.Dispose();
        }
    }
}