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Tooltip

Tooltip for the accumulation chart can be enabled by using the enable property.

razor
default.cs
@using Syncfusion.EJ2;
@section ControlsSection{   
@(Html.EJS().AccumulationChart("container").Series(series =>
            {
                series.DataSource(ViewBag.dataSource)
                      .XName("xValue")
                      .YName("yValue")
                      .Name("Browser")
                      .Type(Syncfusion.EJ2.Charts.AccumulationType.Pie)
                      .ExplodeIndex(0).Add();
            })
            .EnableSmartLabels(true)
            .Title("Mobile Browser Statistics")
            .Tooltip(tp => tp.Enable(true))
            .LegendSettings(ls => ls.Visible(false)).Render()
)
}
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;
        }

We can specify header for the tooltip using header property.

razor
header.cs
@using Syncfusion.EJ2;
@section ControlsSection{   
@(Html.EJS().AccumulationChart("container").Series(series =>
            {
                series.DataSource(ViewBag.dataSource)
                      .XName("xValue")
                      .YName("yValue")
                      .Name("Browser")
                      .Type(Syncfusion.EJ2.Charts.AccumulationType.Pie)
                      .ExplodeIndex(0).Add();
            })
            .EnableSmartLabels(true)
            .Title("Mobile Browser Statistics")
            .Tooltip(tp => tp.Enable(true).Header("Pie Chart"))
            .LegendSettings(ls => ls.Visible(false)).Render()
)
}
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;
        }

Format

By default, tooltip shows information of x and y value in points. In addition to that, you can show more information in tooltip. For example the format ${series.name} ${point.x} shows series name and point x value.

razor
format.cs
@using Syncfusion.EJ2;
@section ControlsSection{   
@(Html.EJS().AccumulationChart("container").Series(series =>
            {
                series.DataSource(ViewBag.dataSource)
                      .XName("xValue")
                      .YName("yValue")
                      .Name("Browser")
                      .Type(Syncfusion.EJ2.Charts.AccumulationType.Pie)
                      .ExplodeIndex(0).Add();
            })
            .EnableSmartLabels(true)
            .Title("Mobile Browser Statistics")
            .Tooltip(tp => tp.Enable(true).Format("format: '${point.x} : <b>${point.y}</b>'"))
            .LegendSettings(ls => ls.Visible(false)).Render()
)
}
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;
        }

Tooltip Format

Any HTML element can be displayed in the tooltip by using the template property.

razor
tooltip-format.cs
@using Syncfusion.EJ2;
@section ControlsSection{   
@(Html.EJS().AccumulationChart("container").Series(series =>
            {
                series.DataSource(ViewBag.dataSource)
                      .XName("xValue")
                      .YName("yValue")
                      .Name("Browser")
                      .Type(Syncfusion.EJ2.Charts.AccumulationType.Pie)
                      .ExplodeIndex(0).Add();
            })
            .EnableSmartLabels(true)
            .Title("Mobile Browser Statistics")
            .Tooltip(tp => tp.Enable(true).Template("<div id='templateWrap' style='background-color:#bd18f9;border-radius: 3px; float: right;padding: 2px;line-height: 20px;text-align: center;'>"+
                 "<img src='sun_annotation.png' />" +
                 "<div style='color:white; font-family:Roboto; font-style: medium; fontp-size:14px;float: right;padding: 2px;line-height: 20px;text-align: center;padding-right:6px'><span>${y}</span></div></div>" ))
            .LegendSettings(ls => ls.Visible(false)).Render()
)
}
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;
        }

Customization

The fill and border properties are used to customize the background color and border of the tooltip respectively. The textStyle property in the tooltip is used to customize the font of the tooltip text.

razor
custom.cs
@using Syncfusion.EJ2;
@section ControlsSection{   
@(Html.EJS().AccumulationChart("container").Series(series =>
            {
                series.DataSource(ViewBag.dataSource)
                      .XName("xValue")
                      .YName("yValue")
                      .Name("Browser")
                      .Type(Syncfusion.EJ2.Charts.AccumulationType.Pie)
                      .ExplodeIndex(0).Add();
            })
            .EnableSmartLabels(true)
            .Title("Mobile Browser Statistics")
            .Tooltip(tp => tp.Enable(true).Format(format: "${series.name} ${point.x} : ${point.y}")
            .Fill('#7bb4eb')
        })
            .LegendSettings(ls => ls.Visible(false)).Render()
)
}
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;
        }

To customize individual tooltip

Using tooltipRender event, you can customize a tooltip for particular point. event, you can customize a tooltip for particular point.

razor
individual.cs
@using Syncfusion.EJ2;
@section ControlsSection{   
@(Html.EJS().AccumulationChart("container").Series(series =>
            {
                series.DataSource(ViewBag.dataSource)
                      .XName("xValue")
                      .YName("yValue")
                      .Name("Browser")
                      .Type(Syncfusion.EJ2.Charts.AccumulationType.Pie)
                      .ExplodeIndex(0).Add();
            })
            .EnableSmartLabels(true)
            .Title("Mobile Browser Statistics")
            .Tooltip(tp => tp.Enable(true))
            .PointRender("pointRender")
            .LegendSettings(ls => ls.Visible(false)).Render()
)
}
<script>
            var pointRender = function (args) {
                if (args.point.index === 3) {
              args.text = args.point.xValue + '' + ':' + args.point.yValue + '' + ' ' +'customtext';
              args.textStyle.color = '#f48042';
        }
            };
</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;
        }

Tooltip Mapping Name

By default, tooltip shows information of x and y value in points. You can show more information from datasource in tooltip by using the tooltipMappingName property of the tooltip. You can use the ${point.tooltip} as place holders to display the specified tooltip content.

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