Hide the tooltip for unselected series

17 Mar 20225 minutes to read

By using the tooltipRender event, you can cancel the tooltip for unselected series in the chart.

To hide the tooltip value in unselected series, follow the given steps:

Step 1: By using the tooltipRender event, you can get the series elements in the arguments. By using this argument, it can be compared whether seriesElementclasslist is deselected container or not. If it is true then the tooltip can be cancelled by setting the value for args.cancel as true.

CSHTML

@Html.EJS().Chart("container").ChartArea(area => area.Border(br => br.Color("transparent"))).Series(series =>
             {
                 series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Line).Width(2).XName("xValue")
                 .Marker(mr => mr.Visible(true).Width(10).Height(10)).YName("yValue")
                 .DataSource(ViewBag.dataSource).Name("Germany").Add();
                 series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Line)
                 .Width(2).XName("xValue").YName("yValue1")
                 .Marker(mr => mr.Visible(true).Width(10).Height(10))
                 .DataSource(ViewBag.dataSource).Name("England").Add();
             }).PrimaryXAxis(px => px.ValueType(Syncfusion.EJ2.Charts.ValueType.DateTime)
             .MajorGridLines(mg => mg.Width(0))
             .IntervalType(Syncfusion.EJ2.Charts.IntervalType.Years)
             .EdgeLabelPlacement(Syncfusion.EJ2.Charts.EdgeLabelPlacement.Shift).LabelFormat("y")
           ).PrimaryYAxis(py => py.LabelFormat("{value}%")
           .RangePadding(Syncfusion.EJ2.Charts.ChartRangePadding.None)
           .MajorTickLines(mt => mt.Width(0))
           .MinorTickLines(mt => mt.Width(0))
           .LineStyle(ls => ls.Width(0)).Interval(20).Minimum(0).Maximum(100)
           ).Title("Inflation - Consumer Price").Tooltip(tt => tt.Enable(true)).TooltipRender("tooltipRender").SelectionMode(Syncfusion.EJ2.Charts.SelectionMode.Series).Render()
<script>
    var tooltipRender = function (args) {
        var series = (args.series);
        if (series.seriesElement.classList[0] === 'container_ej2_deselected') {
            args.cancel = true;
        }
    }
</script>

Hide-tooltip.cs

public IActionResult Index()
        {
            List<LineChartData> chartData = new List<LineChartData>
            {
                new LineChartData { xValue = new DateTime(2005, 01, 01), yValue = 21, yValue1 = 28 },
                new LineChartData { xValue = new DateTime(2006, 01, 01), yValue = 24, yValue1 = 44 },
                new LineChartData { xValue = new DateTime(2007, 01, 01), yValue = 36, yValue1 = 48 },
                new LineChartData { xValue = new DateTime(2008, 01, 01), yValue = 38, yValue1 = 50 },
                new LineChartData { xValue = new DateTime(2009, 01, 01), yValue = 54, yValue1 = 66 },
                new LineChartData { xValue = new DateTime(2010, 01, 01), yValue = 57, yValue1 = 78 },
                new LineChartData { xValue = new DateTime(2011, 01, 01), yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class LineChartData
        {
            public DateTime xValue;
            public double yValue;
            public double yValue1;
        }