GeoPointMapDashboardItemBase.Longitude Property

Gets or sets the dimension that provides the longitude of geographical points.

Namespace: DevExpress.DashboardCommon

Assembly: DevExpress.Dashboard.v19.1.Core.dll

Declaration

C#

[DefaultValue(null)]
public Dimension Longitude { get; set; }

VB.NET

<DefaultValue(Nothing)>
Public Property Longitude As Dimension

Property Value

Type	Default	Description
Dimension	*null*	A Dimension object specifying a dimension that provides the longitude of geographical points.

Example

The following example demonstrates how to bind a Geo Point Map dashboard item to data in code.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-bind-a-geo-point-map-dashboard-item-to-data-in-code-e5036.

Form1.vb

Imports System.Windows.Forms
Imports DevExpress.DashboardCommon
Imports DevExpress.DataAccess.ConnectionParameters
Imports DevExpress.DataAccess.Sql

Namespace Dashboard_CreateGeoPointMap
    Partial Public Class Form1
        Inherits Form

        Public Sub New()
            InitializeComponent()

            ' Creates a new dashboard and a data source for this dashboard.
            Dim dashboard As New Dashboard()
            Dim dataSource As New DashboardSqlDataSource()
            Dim sqlQuery As New CustomSqlQuery("Cities", "select * from Cities")
            dataSource.ConnectionParameters =
                New Access97ConnectionParameters("..\..\Data\Cities.mdb", "", "")
            dataSource.Queries.Add(sqlQuery)

            ' Creates a Geo Point Map dashboard item and specifies its data source.
            Dim geopointMap As New GeoPointMapDashboardItem()
            geopointMap.DataSource = dataSource
            geopointMap.DataMember = "Cities"

            ' Loads the map of the world.
            geopointMap.Area = ShapefileArea.WorldCountries

            ' Provides city coordinates and corresponding populations.
            geopointMap.Latitude = New Dimension("Latitude")
            geopointMap.Longitude = New Dimension("Longitude")
            geopointMap.Value = New Measure("Population")

            ' Adds the Geo Point Map dashboard item to the dashboard and opens this
            ' dashboard in the Dashboard Viewer.
            dashboard.Items.Add(geopointMap)
            dashboardViewer1.Dashboard = dashboard
        End Sub
    End Class
End Namespace

Form1.cs

using System.Windows.Forms;
using DevExpress.DashboardCommon;
using DevExpress.DataAccess.ConnectionParameters;
using DevExpress.DataAccess.Sql;

namespace Dashboard_CreateGeoPointMap {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();

            // Creates a new dashboard and a data source for this dashboard.
            Dashboard dashboard = new Dashboard();
            DashboardSqlDataSource dataSource = new DashboardSqlDataSource();
            CustomSqlQuery sqlQuery = new CustomSqlQuery("Cities", "select * from Cities");
            dataSource.ConnectionParameters = 
                new Access97ConnectionParameters(@"..\..\Data\Cities.mdb", "", "");
            dataSource.Queries.Add(sqlQuery);

            // Creates a Geo Point Map dashboard item and specifies its data source.
            GeoPointMapDashboardItem geopointMap = new GeoPointMapDashboardItem();
            geopointMap.DataSource = dataSource;
            geopointMap.DataMember = "Cities";

            // Loads the map of the world.
            geopointMap.Area = ShapefileArea.WorldCountries;

            // Provides city coordinates and corresponding populations.
            geopointMap.Latitude = new Dimension("Latitude");
            geopointMap.Longitude = new Dimension("Longitude");
            geopointMap.Value = new Measure("Population");

            // Adds the Geo Point Map dashboard item to the dashboard and opens this
            // dashboard in the Dashboard Viewer.
            dashboard.Items.Add(geopointMap);
            dashboardViewer1.Dashboard = dashboard;
        }
    }
}

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Longitude property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

how-to-bind-a-pie-map-dashboard-item-to-data-in-code-t119627/CS/Dashboard_CreatePieMap/Form1.cs#L42

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

how-to-bind-a-geo-point-map-dashboard-item-to-data-in-code-e5036/CS/Dashboard_CreateGeoPointMap/Form1.cs#L25

geopointMap.Latitude = new Dimension("Latitude");
geopointMap.Longitude = new Dimension("Longitude");
geopointMap.Value = new Measure("Population");

VB.NET

how-to-bind-a-pie-map-dashboard-item-to-data-in-code-t119627/VB/Dashboard_CreatePieMap/Form1.vb#L38

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

how-to-bind-a-geo-point-map-dashboard-item-to-data-in-code-e5036/VB/Dashboard_CreateGeoPointMap/Form1.vb#L26

geopointMap.Latitude = New Dimension("Latitude")
geopointMap.Longitude = New Dimension("Longitude")
geopointMap.Value = New Measure("Population")