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Backend API
@(Html.DevExtreme().PieChart()
.ID("pie")
.Size(s => s.Width(500))
.Palette(VizPalette.Bright)
.Series(s => s
.Add()
.ArgumentField("Country")
.ValueField("Area")
.Label(l => l
.Visible(true)
.Connector(c => c
.Visible(true)
.Width(1)
)
)
)
.Title("Area of Countries")
.Export(e => e.Enabled(true))
.OnPointClick(@<text>
function (e) {
var point = e.target;
toggleVisibility(point);
}
</text>)
.OnLegendClick(@<text>
function (e) {
var arg = e.target;
toggleVisibility(this.getAllSeries()[0].getPointsByArg(arg)[0]);
}
</text>)
.DataSource(new[] {
new { Country = "Russia", Area = 12 },
new { Country = "Canada", Area = 7 },
new { Country = "USA", Area = 7 },
new { Country = "China", Area = 7 },
new { Country = "Brazil", Area = 6 },
new { Country = "Australia", Area = 5 },
new { Country = "India", Area = 2 },
new { Country = "Others", Area = 55 }
})
)
<script>
function toggleVisibility(item) {
if(item.isVisible()) {
item.hide();
} else {
item.show();
}
}
</script>
using DevExtreme.AspNet.Data;
using DevExtreme.AspNet.Mvc;
using DevExtreme.NETCore.Demos.Models;
using DevExtreme.NETCore.Demos.Models.SampleData;
using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
namespace DevExtreme.NETCore.Demos.Controllers {
public class ChartsController : Controller {
public ActionResult Pie() {
return View();
}
}
}