ValueMap Class
Contains a measure that provides data to color a map in the ChoroplethMapDashboardItem.
Namespace: DevExpress.DashboardCommon
Assembly: DevExpress.Dashboard.v22.1.Core.dll
Declaration
Example
The following example demonstrates how to bind a Choropleth Map dashboard item to data in code.
using System.Windows.Forms;
using DevExpress.DashboardCommon;
using DevExpress.DataAccess.ConnectionParameters;
using DevExpress.DataAccess.Sql;
namespace Dashboard_CreateChoroplethMap {
public partial class Form1 : DevExpress.XtraEditors.XtraForm
{
public Form1() {
InitializeComponent();
Dashboard dashboard = new Dashboard();
DashboardSqlDataSource dataSource = new DashboardSqlDataSource();
CustomSqlQuery sqlQuery = new CustomSqlQuery("Countries", "select * from Countries");
dataSource.ConnectionParameters = new Access97ConnectionParameters(@"..\..\Data\countriesDB.mdb", "", "");
dataSource.Queries.Add(sqlQuery);
ChoroplethMapDashboardItem choroplethMap = new ChoroplethMapDashboardItem();
choroplethMap.DataSource = dataSource;
choroplethMap.DataMember = "Countries";
choroplethMap.Area = ShapefileArea.WorldCountries;
choroplethMap.AttributeName = "NAME";
choroplethMap.AttributeDimension = new Dimension("Country");
ValueMap populationMap = new ValueMap(new Measure("Population"));
choroplethMap.Maps.Add(populationMap);
dashboard.Items.Add(choroplethMap);
dashboardViewer1.Dashboard = dashboard;
}
}
}
Related GitHub Examples
The following code snippets (auto-collected from DevExpress Examples) contain references to the ValueMap class.
Note
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