Pie & Doughnut in ASP.NET CORE Accumulation Chart Component

27 May 202224 minutes to read

Pie Chart

To render a pie series, use the series type as Pie.

<ejs-accumulationchart id="container" title="Mobile Browser Statistics">
            <e-accumulationchart-legendsettings visible="false">
            </e-accumulationchart-legendsettings>
            <e-accumulation-series-collection>
                <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser">
                </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37 },
                new PieChartData { xValue = "UC Browser", yValue = 17 },
                new PieChartData { xValue = "iPhone", yValue = 19 },
                new PieChartData { xValue = "Others", yValue = 4  },
                new PieChartData { xValue = "Opera", yValue = 11 },
                new PieChartData { xValue = "Android", yValue = 12 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Radius Customization

By default, radius of the pie series will be 80% of the size (minimum of chart width and height). You can customize this using radius property of the series.

<ejs-accumulationchart id="container" title="Mobile Browser Statistics">
            <e-accumulationchart-legendsettings visible="false">
            </e-accumulationchart-legendsettings>
            <e-accumulation-series-collection>
                <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser"
                radius="100%">
                </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37 },
                new PieChartData { xValue = "UC Browser", yValue = 17 },
                new PieChartData { xValue = "iPhone", yValue = 19 },
                new PieChartData { xValue = "Others", yValue = 4  },
                new PieChartData { xValue = "Opera", yValue = 11 },
                new PieChartData { xValue = "Android", yValue = 12 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Pie Center

The center position of the pie can be changed by Center X and Center Y. By default, center value of the pie series x and y is 50%. You can customize this using center property of the series.

@{
        var piecenter = new
        {
            x = "60%",
            y = "60%"
        };

    

<ejs-accumulationchart id="container" title="Mobile Browser Statistics" enableAnimation="false" center="piecenter">
            <e-accumulationchart-tooltipsettings enable="true"></e-accumulationchart-tooltipsettings>
            <e-accumulationchart-legendsettings visible="false">
            </e-accumulationchart-legendsettings>
            <e-accumulation-series-collection>
                <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser" explodeIndex="0" explode="true" explodeOffset="10%">
                    <e-accumulationseries-datalabel name="text" visible="true">
                        <e-font fontWeight="600" color="white"></e-font>
                    </e-accumulationseries-datalabel>
                </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieData { xValue =  "Chrome", yValue = 37, text = "37%" },
                new PieData { xValue =  "UC Browser", yValue = 17, text = "17%" },
                new PieData { xValue =  "iPhone", yValue = 19, text = "19%" },
                new PieData { xValue =  "Others", yValue = 4, text = "4%" },
                new PieData { xValue =  "Opera", yValue = 11, text = "11%" },
                new PieData { xValue =  "Android", yValue = 12, text = "12%" },   

            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
            public string text;
            
        }

Various Radius Pie Chart

You can use radius mapping to render the slice with different radius pie and also use border , fill properties to customize the point. dataLabel is used to represent individual data and its value.

<ejs-accumulationchart id="container" enableAnimation="true" enableSmartLabels="true">
            <e-accumulationchart-tooltipsettings enable="true"></e-accumulationchart-tooltipsettings>
            <e-accumulationchart-legendsettings visible="true">
            </e-accumulationchart-legendsettings>
            <e-accumulation-series-collection>
                <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue"  innerRadius="20%" radius="r">
                    <e-accumulationseries-datalabel name="x" visible="true" position="Outside">
                    </e-accumulationseries-datalabel>
                </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieRadiusChartData { xValue = "Argentina", yValue = 505370, r = "100"},
                new PieRadiusChartData { xValue = "Belgium",    yValue = 551500, r = "118.7"},
                new PieRadiusChartData { xValue = "Cuba",  yValue = 312685 , r = "124.6"},
                new PieRadiusChartData { xValue = "Dominican Republic", yValue = 350000 , r = "137.5"},
                new PieRadiusChartData { xValue = "Egypt", yValue = 301000 , r = "150.8"},
                new PieRadiusChartData { xValue = "Kazakhstan", yValue = 300000, r = "155.5"},
                new PieRadiusChartData { xValue = "Somalia",  yValue = 357022, r = "160.6"}  

            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
            public string r;
            
        }

Doughnut Chart

To achieve a doughnut in pie series, customize the innerRadius property of the series. By setting value greater than 0%, a doughnut will appear. The innerRadius property takes value from 0% to 100% of the pie radius.

<ejs-accumulationchart id="container" title="Mobile Browser Statistics">
            <e-accumulationchart-legendsettings visible="false">
            </e-accumulationchart-legendsettings>
            <e-accumulation-series-collection>
                <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser" innerRadius="40%">
                </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37 },
                new PieChartData { xValue = "UC Browser", yValue = 17 },
                new PieChartData { xValue = "iPhone", yValue = 19 },
                new PieChartData { xValue = "Others", yValue = 4  },
                new PieChartData { xValue = "Opera", yValue = 11 },
                new PieChartData { xValue = "Android", yValue = 12 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Start and End angles

You can customize the start and end angle of the pie series using the startAngle and endAngle properties. The default value of startAngle is 0 degree, and endAngle is 360 degrees. By customizing this, you can achieve a semi pie series.

<ejs-accumulationchart id="container" title="Mobile Browser Statistics">
            <e-accumulationchart-legendsettings visible="false">
            </e-accumulationchart-legendsettings>
            <e-accumulation-series-collection>
                <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser"
                startAngle="270" endAngle="90">
                </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37 },
                new PieChartData { xValue = "UC Browser", yValue = 17 },
                new PieChartData { xValue = "iPhone", yValue = 19 },
                new PieChartData { xValue = "Others", yValue = 4  },
                new PieChartData { xValue = "Opera", yValue = 11 },
                new PieChartData { xValue = "Android", yValue = 12 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Color & Text Mapping

The fill color and the text in the data source can be mapped to the chart using pointColorMapping in series and name in datalabel respectively.

<ejs-accumulationchart id="container" title="Mobile Browser Statistics">
                    <e-accumulationchart-legendsettings visible="false">
                    </e-accumulationchart-legendsettings>
                    <e-accumulation-series-collection>
                        <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser"
                                               pointColorMapping="fill">
                            <e-accumulationseries-datalabel name="text" visible="true">
                            </e-accumulationseries-datalabel>
                        </e-accumulation-series>
                    </e-accumulation-series-collection>
                </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37, text = "37%", fill="#498fff"},
                new PieChartData { xValue = "UC Browser", yValue = 17, text = "17%", fill="#ffa060"},
                new PieChartData { xValue = "iPhone", yValue = 19, text = "19%", fill="#ff68b6"},
                new PieChartData { xValue = "Others", yValue = 4 , text = "4%", fill="#81e2a1"},
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Customization

Individual points can be customized using the pointRender event.

<ejs-accumulationchart id="container" title="Mobile Browser Statistics" pointRender="pointRender">
                    <e-accumulationchart-legendsettings visible="false">
                    </e-accumulationchart-legendsettings>
                    <e-accumulation-series-collection>
                        <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser">
                        </e-accumulation-series>
                    </e-accumulation-series-collection>
                </ejs-accumulationchart>

       <script>
            var pointRender = function (args) {
                if ((args.point.x).indexOf("iPhone") > -1) {
                    args.fill = '#f4bc42';
                }
                else {
                    args.fill = '#597cf9';
                }
            };
        </script>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37 },
                new PieChartData { xValue = "UC Browser", yValue = 17 },
                new PieChartData { xValue = "iPhone", yValue = 19 },
                new PieChartData { xValue = "Others", yValue = 4  },
                new PieChartData { xValue = "Opera", yValue = 11 },
                new PieChartData { xValue = "Android", yValue = 12 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Hide pie or doughnut border

By default, the border will appear in the pie or doughnut chart while mouse hover on the chart. You can disable the border by setting EnableBorderOnMouseMove property is false.

<ejs-accumulationchart id="container" enableBorderOnMouseMove="false">
                    <e-accumulationchart-legendsettings visible="false">
                    </e-accumulationchart-legendsettings>
                    <e-accumulation-series-collection>
                        <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser">
                        </e-accumulation-series>
                    </e-accumulation-series-collection>
                </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37 },
                new PieChartData { xValue = "UC Browser", yValue = 17 },
                new PieChartData { xValue = "iPhone", yValue = 19 },
                new PieChartData { xValue = "Others", yValue = 4  },
                new PieChartData { xValue = "Opera", yValue = 11 },
                new PieChartData { xValue = "Android", yValue = 12 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Color Palette

You can customize the color of the point using the palettes property.

<ejs-accumulationchart id="container" enableBorderOnMouseMove="false">
                    <e-accumulationchart-legendsettings visible="false">
                    </e-accumulationchart-legendsettings>
                    <e-accumulation-series-collection>
                        <e-accumulation-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="Browser" palettes="['teal', 'skyblue', 'green', 'red']">
                        </e-accumulation-series>
                    </e-accumulation-series-collection>
                </ejs-accumulationchart>
public ActionResult Index()
        {
            List<PieChartData> chartData = new List<PieChartData>
            {

                new PieChartData { xValue = "Chrome", yValue = 37 },
                new PieChartData { xValue = "UC Browser", yValue = 17 },
                new PieChartData { xValue = "iPhone", yValue = 19 },
                new PieChartData { xValue = "Others", yValue = 4  },
                new PieChartData { xValue = "Opera", yValue = 11 },
                new PieChartData { xValue = "Android", yValue = 12 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PieChartData
        {
            public string xValue;
            public double yValue;
        }

Multi-level pie chart

You can achieve a multi-level drill down in pie and doughnut charts using pointClick event. If user clicks any point in the chart, that corresponding data will be shown in the next level and so on based on point clicked.

You can also achieve drill-up (back to the initial state) by using chartMouseClick event. In below sample, you can drill-up by clicking back button in the center of the chart.

<div>
    <ejs-accumulationchart id="chart" textRender="textRender" PointClick="pointClick" chartMouseClick="chartMouseClick" title="Automobile Sales by Category">
        <e-accumulationchart-legendsettings visible="false">
        </e-accumulationchart-legendsettings>
        <e-accumulation-series-collection>
            <e-accumulation-series explode="false" type="Pie" xName="x" yName="y" dataSource="ViewBag.dataSource" name="Project">
                <e-accumulationseries-datalabel visible="true" name="text">
                    <e-font fontWeight="600"></e-font>
                </e-accumulationseries-datalabel>
            </e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>

    <ejs-grid id="grid" dataSource="ViewBag.dataSource">
        <e-grid-columns>
            <e-grid-column field="x" headerText="Vehicle" type="string"></e-grid-column>
            <e-grid-column field="y" headerText="Sales" type="string"></e-grid-column>
        </e-grid-columns>
    </ejs-grid>
</div>
<script>
    var pointIndex = -1;
    var data = [
        {
            x: 'SUV',
            y: 25,
            z: [
                {
                    title: 'Automobile Sales in the SUV Segment',
                    x: 'Toyota',
                    y: 8,
                    z: [
                        { x: '2000', y: 20 },
                        { x: '2001', y: 30 },
                        { x: '2002', y: 40 },
                    ],
                },
                { x: 'Ford', y: 12 },
                { x: 'GM', y: 17 },
                { x: 'Renault', y: 6 },
            ],
        },
        {
            x: 'Car',
            y: 37,
            z: [
                { title: 'Automobile Sales in the Car Segment', x: 'Toyota', y: 7 },
                { x: 'Chrysler', y: 12 },
                { x: 'Nissan', y: 9 },
                { x: 'Ford', y: 15 },
            ],
        },
        {
            x: 'Pickup',
            y: 15,
            z: [
                { title: 'Automobile Sales in the Pickup Segment', x: 'Nissan', y: 9 },
                { x: 'Chrysler', y: 4 },
                { x: 'Ford', y: 7 },
                { x: 'Toyota', y: 20 },
            ],
        },
        {
            x: 'Minivan',
            y: 23,
            z: [
                { title: 'Automobile Sales in the Minivan Segment', x: 'Hummer', y: 11 },
                { x: 'Ford', y: 5 },
                { x: 'GM', y: 12 },
                { x: 'Chrysler', y: 3 },
            ],
        },
    ];

    var textRender = function (args) {
        args.text = args.point.x + ' ' + args.point.y + ' %';
    };

    var chartMouseClick = function (args) {
        var pie = document.getElementById("chart").ej2_instances[0];
        var grid = document.getElementById("grid").ej2_instances[0];
        if (args.target.indexOf('back') > -1) {
            if (pie.series[0].name === 'Level 3') {
                pie.series[0].dataSource = data[window.pointIndex].z;
                pie.series[0].name = 'Level 2';
                pie.title = data[window.pointIndex].z[0].title;
                pie.series[0].innerRadius = '30%';
                grid.dataSource = pie.series[0].dataSource;
                grid.columns[0].headerText = data[window.pointIndex].x;
                grid.refresh();
                pie.refresh();
            } else if (pie.series[0].name === 'Level 2') {
                pie.series[0].dataSource = data;
                pie.series[0].name = 'Level 1';
                pie.series[0].innerRadius = '0%';
                pie.title = 'Automobile Sales by Category';
                pie.annotations = [{}];
                pie.pointClick = pointClick;
                grid.dataSource = pie.series[0].dataSource;
                grid.columns[0].headerText = 'Vehicle';
                grid.refresh();
                pie.refresh();
            }
        }
        grid.dataSource = pie.series[0].dataSource;
    };
    var pointClick = function (args) {
        var pie = document.getElementById("chart").ej2_instances[0];
        var grid = document.getElementById("grid").ej2_instances[0];
        if (
            ej.charts.getElement(
                pie.element.id +
                '_Series_' +
                args.seriesIndex +
                '_Point_' +
                args.pointIndex
            )
        ) {
            pie.series[0].dataSource = data[args.pointIndex].z;
            pie.title = data[args.pointIndex].z[0].title;
            window.pointIndex = args.pointIndex;

            pie.series[0].name = 'Level 2';
            pie.series[0].innerRadius = '30%';
            pie.annotations = [
                {
                    content:
                        '<div id="back" style="cursor:pointer;padding:3px;width:30px; height:30px;">' +
                        '<img src="https://ej2.syncfusion.com/javascript/demos/src/chart/images/back.png" id="back" />',
                    region: 'Series',
                    x: '50%',
                    y: '50%',
                },
            ];
            pie.pointClick = click;
        }
        grid.dataSource = pie.series[0].dataSource;
        grid.columns[0].headerText = data[args.pointIndex].x;
        grid.refresh();
        pie.refresh();
    }
    var click = function (args) {
        var pie = document.getElementById("chart").ej2_instances[0];
        var grid = document.getElementById("grid").ej2_instances[0];
        if (pie.series[0].name !== 'Level 3') {
            switch (args.pointIndex) {
                case 0:
                    pie.series[0].dataSource = data[0].z[0].z;
                    pie.title = 'SUV Sales by Years';
                    pie.series[0].name = 'Level 3';
                    grid.columns[0].headerText = 'Year';
                    grid.refresh();
                    pie.refresh();
                    break;
            }
            grid.dataSource = pie.series[0].dataSource;
        }
    };
</script>
public IActionResult Index()
    {
        List<CategoryData> chartData = new List<CategoryData>
        {
            new CategoryData { x = "SUV", y = 25 },
            new CategoryData { x = "Car", y = 37 },
            new CategoryData { x = "Pickup", y = 15 },
            new CategoryData { x = "Minivan", y = 23 },

            };
        ViewBag.datalabel = new
        {
            visible = true,
            position = "Inside",
            name = "text",
            font = new
            {
                fontWeight = "600"
            }
        };
        ViewBag.dataSource = chartData;

        return View();
    }
    public class CategoryData
    {
        public string x;
        public double y;
    }

ASP.NET Core AccumulationChart Drill-Down and Display Data in Grid

See Also