Providing Data

• Oct 28, 2021
• 3 minutes to read

The Dashboard Designer allows you to bind dashboard items to data in a uniform and similar manner. See the Bind Dashboard Items to Data topic for common information.

The difference is in the data sections that the specific dashboard item has. This topic describes how to bind the Pie Map dashboard item to data in the Designer or in code.

• Binding to Data in the Designer
• Example

Binding to Data in the Designer

The image below shows a sample Pie Map dashboard item that is bound to data.

Note that the Pie Map provides two data item groups for data binding: DATA ITEMS and TOOLTIP DATA ITEMS. Tables below list the available data sections.

Data Items

Section	Processed as	Description	API
Latitude	Dimension	Accepts a dimension used to provide geographic latitude.	GeoPointMapDashboardItemBase.Latitude
Longitude	Dimension	Accepts a dimension used to provide geographic longitude.	GeoPointMapDashboardItemBase.Longitude
Values	Measure Note In case of negative measure values, Pie Map uses their absolute values.	Accepts measures used to calculate pie values. If you added a data item to the Argument section and several data items to the Values section, you can use the Values drop-down menu to switch between the provided values. To invoke the Values menu, click the icon in the map’s caption or use the map’s context menu.	PieMapDashboardItem.Values
Argument	Dimension	Allows you to provide data for pie arguments.	PieMapDashboardItem.Argument

Tooltip Data Items

Section	Processed as	Description	API
Dimensions	Dimension	Accepts dimensions allowing you to add supplementary content to the tooltips.	GeoPointMapDashboardItemBase.TooltipDimensions
Measures	Measure	Accepts measures allowing you to add summaries to the tooltips.	MapDashboardItem.TooltipMeasures

Example

The following code snippets show how to bind a Pie Map dashboard item to data in code.

Form1.cs

using System;
using DevExpress.DashboardCommon;
using DevExpress.DataAccess.ConnectionParameters;
using DevExpress.DataAccess.Sql;
using DevExpress.XtraEditors;

namespace Dashboard_CreatePieMap {
    public partial class Form1 : XtraForm {
        public Form1() {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Dashboard dashboard = new Dashboard();

            DashboardSqlDataSource xmlDataSource = new DashboardSqlDataSource();
            xmlDataSource.ConnectionParameters =
                new XmlFileConnectionParameters(@"..\..\Data\DashboardEnergyStatictics.xml");
            SelectQuery sqlQuery = SelectQueryFluentBuilder
                .AddTable("Countries")
                .SelectColumns("Latitude", "Longitude", "Production", "EnergyType", "Country")
                .Build("Query 1");
            xmlDataSource.Queries.Add(sqlQuery);
            dashboard.DataSources.Add(xmlDataSource);

            PieMapDashboardItem pieMap = CreatePieMap(xmlDataSource);

            dashboard.Items.Add(pieMap);
            dashboardViewer1.Dashboard = dashboard;
        }

        private static PieMapDashboardItem CreatePieMap(DashboardSqlDataSource xmlDataSource)
        {
            PieMapDashboardItem pieMap = new PieMapDashboardItem();
            pieMap.DataSource = xmlDataSource;
            pieMap.DataMember = "Query 1";

            pieMap.Area = ShapefileArea.Europe;

            pieMap.Latitude = new Dimension("Latitude");
            pieMap.Longitude = new Dimension("Longitude");

            pieMap.Values.Add(new Measure("Production"));
            pieMap.Argument = new Dimension("EnergyType");

            pieMap.TooltipDimensions.Add(new Dimension("Country"));
            pieMap.Legend.Visible = true;
            return pieMap;
        }
    }
}

Form1.vb

Imports System
Imports DevExpress.DashboardCommon
Imports DevExpress.DataAccess.ConnectionParameters
Imports DevExpress.DataAccess.Sql
Imports DevExpress.XtraEditors

Namespace Dashboard_CreatePieMap
    Partial Public Class Form1
        Inherits XtraForm

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
            Dim dashboard As New Dashboard()

            Dim xmlDataSource As New DashboardSqlDataSource()
            xmlDataSource.ConnectionParameters = New XmlFileConnectionParameters("..\..\Data\DashboardEnergyStatictics.xml")
            Dim sqlQuery As SelectQuery = SelectQueryFluentBuilder.AddTable("Countries").SelectColumns("Latitude", "Longitude", "Production", "EnergyType", "Country").Build("Query 1")
            xmlDataSource.Queries.Add(sqlQuery)
            dashboard.DataSources.Add(xmlDataSource)

            Dim pieMap As PieMapDashboardItem = CreatePieMap(xmlDataSource)

            dashboard.Items.Add(pieMap)
            dashboardViewer1.Dashboard = dashboard
        End Sub

        Private Shared Function CreatePieMap(ByVal xmlDataSource As DashboardSqlDataSource) As PieMapDashboardItem
            Dim pieMap As New PieMapDashboardItem()
            pieMap.DataSource = xmlDataSource
            pieMap.DataMember = "Query 1"

            pieMap.Area = ShapefileArea.Europe

            pieMap.Latitude = New Dimension("Latitude")
            pieMap.Longitude = New Dimension("Longitude")

            pieMap.Values.Add(New Measure("Production"))
            pieMap.Argument = New Dimension("EnergyType")

            pieMap.TooltipDimensions.Add(New Dimension("Country"))
            pieMap.Legend.Visible = True
            Return pieMap
        End Function
    End Class
End Namespace