Tooltip in ASP.NET CORE 3D Circular Chart component

18 Mar 202413 minutes to read

The 3D Circular Chart will display details about the points through a tooltip, when the mouse is moved over a specific point. By default, the tooltip is not visible. It can be enabled by using the Enable property in Tooltip to true.

CSHTML

<ejs-circularchart3d id="container" tilt="-45">
    <e-circularchart3d-legendsettings visible="false">
    </e-circularchart3d-legendsettings>
    <e-circularchart3d-tooltipsettings enable="true">
    </e-circularchart3d-tooltipsettings>
    <e-circularchart3d-series-collection>
        <e-circularchart3d-series dataSource="ViewBag.dataSource" xName="X" yName="Y">
        </e-circularchart3d-series>
    </e-circularchart3d-series-collection>
</ejs-circularchart3d>

Tooltip.cs

public IActionResult Index()
{
    List<CircularChartData> circularData = new List<CircularChartData>
    {
        new CircularChartData { X = "Jan",  Y = 13 },
        new CircularChartData { X = "Feb",  Y = 13 },
        new CircularChartData { X = "Mar",  Y = 17 },
        new CircularChartData { X = "Apr",  Y = 13.5 }
    };
    ViewBag.dataSource = circularData;
    return View();
}
public class CircularChartData
{
    public string X;
    public double Y;
}

Header

You can specify a header for the tooltip by using the Header property in Tooltip.

CSHTML

<ejs-circularchart3d id="container" tilt="-45">
    <e-circularchart3d-legendsettings visible="false">
    </e-circularchart3d-legendsettings>
    <e-circularchart3d-tooltipsettings enable="true" header="Pie Chart">
    </e-circularchart3d-tooltipsettings>
    <e-circularchart3d-series-collection>
        <e-circularchart3d-series dataSource="ViewBag.dataSource" xName="X" yName="Y">
        </e-circularchart3d-series>
    </e-circularchart3d-series-collection>
</ejs-circularchart3d>

Header.cs

public IActionResult Index()
{
    List<CircularChartData> circularData = new List<CircularChartData>
    {
        new CircularChartData { X = "Jan",  Y = 13 },
        new CircularChartData { X = "Feb",  Y = 13 },
        new CircularChartData { X = "Mar",  Y = 17 },
        new CircularChartData { X = "Apr",  Y = 13.5 }
    };
    ViewBag.dataSource = circularData;
    return View();
}
public class CircularChartData
{
    public string X;
    public double Y;
}

Format

By default, the tooltip shows information about the x and y values in points. Additionally, more information can be displayed in the tooltip by using the Format property. For example, the format ${series.name} : ${point.x} shows the series name and the point’s x value.

CSHTML

<ejs-circularchart3d id="container" tilt="-45">
    <e-circularchart3d-legendsettings visible="false">
    </e-circularchart3d-legendsettings>
    <e-circularchart3d-tooltipsettings enable="true" format="${point.x} : <b>${point.y}%</b>">
    </e-circularchart3d-tooltipsettings>
    <e-circularchart3d-series-collection>
        <e-circularchart3d-series dataSource="ViewBag.dataSource" xName="X" yName="Y">
        </e-circularchart3d-series>
    </e-circularchart3d-series-collection>
</ejs-circularchart3d>

Tooltip-format.cs

public IActionResult Index()
{
    List<CircularChartData> circularData = new List<CircularChartData>
    {
        new CircularChartData { X = "Jan",  Y = 13 },
        new CircularChartData { X = "Feb",  Y = 13 },
        new CircularChartData { X = "Mar",  Y = 17 },
        new CircularChartData { X = "Apr",  Y = 13.5 }
    };
    ViewBag.dataSource = circularData;
    return View();
}
public class CircularChartData
{
    public string X;
    public double Y;
}

Tooltip template

Any HTML elements can be displayed in the tooltip by using the Template property in the tooltip.

CSHTML

<ejs-circularchart3d id="container" tilt="-45">
    <e-circularchart3d-legendsettings visible="false">
    </e-circularchart3d-legendsettings>
    <e-circularchart3d-tooltipsettings 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='https://ej2.syncfusion.com/demos/src/chart/images/sunny.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>">
    </e-circularchart3d-tooltipsettings>
    <e-circularchart3d-series-collection>
        <e-circularchart3d-series dataSource="ViewBag.dataSource" xName="X" yName="Y">
        </e-circularchart3d-series>
    </e-circularchart3d-series-collection>
</ejs-circularchart3d>

Template.cs

public IActionResult Index()
{
    List<CircularChartData> circularData = new List<CircularChartData>
    {
        new CircularChartData { X = "Jan",  Y = 13 },
        new CircularChartData { X = "Feb",  Y = 13 },
        new CircularChartData { X = "Mar",  Y = 17 },
        new CircularChartData { X = "Apr",  Y = 13.5 }
    };
    ViewBag.dataSource = circularData;
    return View();
}
public class CircularChartData
{
    public string X;
    public double Y;
}

Fixed tooltip

By default, the tooltip tracks the mouse movement, but it can be set to a fixed position using the Location property in Tooltip.

CSHTML

<ejs-circularchart3d id="container" tilt="-45">
    <e-circularchart3d-legendsettings visible="false">
    </e-circularchart3d-legendsettings>
    <e-circularchart3d-tooltipsettings enable="true">
        <e-circularchart3dtooltipsettings-location x="200" y="20"></e-circularchart3dtooltipsettings-location>
    </e-circularchart3d-tooltipsettings>
    <e-circularchart3d-series-collection>
        <e-circularchart3d-series dataSource="ViewBag.dataSource" xName="X" yName="Y">
        </e-circularchart3d-series>
    </e-circularchart3d-series-collection>
</ejs-circularchart3d>

Fixed-tooltip.cs

public IActionResult Index()
{
    List<CircularChartData> circularData = new List<CircularChartData>
    {
        new CircularChartData { X = "Jan",  Y = 13 },
        new CircularChartData { X = "Feb",  Y = 13 },
        new CircularChartData { X = "Mar",  Y = 17 },
        new CircularChartData { X = "Apr",  Y = 13.5 }
    };
    ViewBag.dataSource = circularData;
    return View();
}
public class CircularChartData
{
    public string X;
    public double Y;
}

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. Additionally, the HighlightColor property can be used to change the color of the data point when hovering.

CSHTML

<ejs-circularchart3d id="container" tilt="-45" highlightColor="red" highlightMode="@Syncfusion.EJ2.Charts.CircularChart3DHighlightMode.Point">
    <e-circularchart3d-legendsettings visible="false">
    </e-circularchart3d-legendsettings>
    <e-circularchart3d-tooltipsettings enable="true" format="${series.name} ${point.x} : ${point.y}" fill="#7bb4eb">
        <e-circularchart3dtooltipsettings-border width="2" color="grey"/>
    </e-circularchart3d-tooltipsettings>
    <e-circularchart3d-series-collection>
        <e-circularchart3d-series dataSource="ViewBag.dataSource" xName="X" yName="Y">
        </e-circularchart3d-series>
    </e-circularchart3d-series-collection>
</ejs-circularchart3d>

Tooltip-custom.cs

public IActionResult Index()
{
    List<CircularChartData> circularData = new List<CircularChartData>
    {
        new CircularChartData { X = "Jan",  Y = 13 },
        new CircularChartData { X = "Feb",  Y = 13 },
        new CircularChartData { X = "Mar",  Y = 17 },
        new CircularChartData { X = "Apr",  Y = 13.5 }
    };
    ViewBag.dataSource = circularData;
    return View();
}
public class CircularChartData
{
    public string X;
    public double Y;
}

Customization of individual tooltip

Using the TooltipRender event, you can customize tooltip values for a particular point.

CSHTML

<ejs-circularchart3d id="container" tilt="-45" tooltipRender="tooltipRender">
    <e-circularchart3d-legendsettings visible="false">
    </e-circularchart3d-legendsettings>
    <e-circularchart3d-tooltipsettings enable="true">
    </e-circularchart3d-tooltipsettings>
    <e-circularchart3d-series-collection>
        <e-circularchart3d-series dataSource="ViewBag.dataSource" xName="X" yName="Y">
        </e-circularchart3d-series>
    </e-circularchart3d-series-collection>
</ejs-circularchart3d>

<script>
    var tooltipRender = function(args) {
        if (args.point.index === 3) {
            args.text = args.point.x + '' + ':' + args.point.y + '' + ' ' +'customtext';
            args.textStyle.color = '#f48042';
        }
    }
</script>

Tooltip-event.cs

public IActionResult Index()
{
    List<CircularChartData> circularData = new List<CircularChartData>
    {
        new CircularChartData { X = "Jan",  Y = 13 },
        new CircularChartData { X = "Feb",  Y = 13 },
        new CircularChartData { X = "Mar",  Y = 17 },
        new CircularChartData { X = "Apr",  Y = 13.5 }
    };
    ViewBag.dataSource = circularData;
    return View();
}
public class CircularChartData
{
    public string X;
    public double Y;
}