Charts - Tooltips: HTML Markup Support

To set the tooltip's content, specify the contentTemplate. Inside the template, you can identify the chart series point for which the tooltip is displayed and thus display information related to that point.

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Backend API

@(Html.DevExtreme().PieChart() .ID("pie-chart") .Palette(VizPalette.Bright) .Title("Top 10 Most Populated States in US") .Series(s => s .Add() .ArgumentField("Name") .ValueField("Population") ) .Export(e => e.Enabled(true)) .Tooltip(t => t .Enabled(true) .ContentTemplate(@<text> <div class='state-tooltip'> <img src="<%- getImagePath(point) %>" /><h4 class='state'><%- argument %></h4> <div class='capital'> <span class='caption'>Capital</span>: <%- point.data.Capital %> </div> <div class='population'> <span class='caption'>Population</span>: <%- formatNumber(value) %> people </div> <div> <span class='caption'>Area</span>: <span class='area-km'><%- formatNumber(point.data.Area) %></span> km<sup>2</sup> (<span class='area-mi'><%- formatNumber(0.3861 * point.data.Area) %></span> mi<sup>2</sup>) </div> </div> </text>) ) .DataSource(new[] { new { Name = "California", Population = 38802500, Capital = "Sacramento", Area = 423967 }, new { Name = "Texas", Population = 26956958, Capital = "Austin", Area = 695662 }, new { Name = "Florida", Population = 19893297, Capital = "Tallahassee", Area = 170312 }, new { Name = "New York", Population = 19746227, Capital = "Albany", Area = 141297 }, new { Name = "Illinois", Population = 12880580, Capital = "Springfield", Area = 149995 }, new { Name = "Pennsylvania", Population = 12787209, Capital = "Harrisburg", Area = 119280 }, new { Name = "Ohio", Population = 11594163, Capital = "Columbus", Area = 116098 }, new { Name = "Georgia", Population = 10097343, Capital = "Atlanta", Area = 153910 }, new { Name = "North Carolina", Population = 9943964, Capital = "Raleigh", Area = 139391 }, new { Name = "Michigan", Population = 9909877, Capital = "Lansing", Area = 250487 } }) ) <script> var formatNumber = new Intl.NumberFormat("en-US", { maximumFractionDigits: 0 }).format; function getImagePath(point) { return '../../Content/Images/flags/' + point.data.Name.replace(/\s/, "") + ".svg" } </script>

using DevExtreme.AspNet.Data; using DevExtreme.AspNet.Mvc; using DevExtreme.MVC.Demos.Models.SampleData; using System; using System.Collections.Generic; using System.Linq; using System.Text.Json; using System.Web.Mvc; namespace DevExtreme.MVC.Demos.Controllers { public class ChartsController : Controller { public ActionResult TooltipHTMLSupport() { return View(); } } }

#pie-chart { height: 440px; } .state-tooltip { height: 90px; } .state-tooltip > img { width: 60px; height: 40px; display: block; margin: 0 5px 0 0; float: left; border: 1px solid rgba(191, 191, 191, 0.25); } .state-tooltip > h4 { line-height: 40px; font-size: 14px; margin-bottom: 5px; } .state-tooltip .caption { font-weight: 500; } .state-tooltip sup { font-size: 0.8em; vertical-align: super; line-height: 0; }