Selection in ASP.NET CORE Chart Component
19 Dec 202224 minutes to read
Chart provides selection support for the series and its data points on mouse click.
NOTE
When Mouse is clicked on the data points, the corresponding series legend will also be selected.
There are different types of selection mode for selecting the data. They are,
- None
- Point
- Series
- Cluster
- DragXY
- DragX
- DragY
Point
You can select a point, by setting selectionMode to point.
<ejs-chart id="container" title="Olympic Medals" selectionMode="Point">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Gold" xName="country" width="2" opacity="1" yName="gold" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="Silver" xName="country" width="2" opacity="1" yName="silver" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="bronze" xName="country" width="2" opacity="1" yName="bronze" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
</e-series-collection>
</ejs-chart>public IActionResult Column()
{
List<ColumnChartData> chartData = new List<ColumnChartData>
{
new ColumnChartData{ country= "USA", gold=50, silver=70, bronze=45 },
new ColumnChartData{ country="China", gold=40, silver= 60, bronze=55 },
new ColumnChartData{ country= "Japan", gold=70, silver= 60, bronze=50 },
new ColumnChartData{ country= "Australia", gold=60, silver= 56, bronze=40 },
new ColumnChartData{ country= "France", gold=50, silver= 45, bronze=35 },
new ColumnChartData{ country= "Germany", gold=40, silver=30, bronze=22 },
new ColumnChartData{ country= "Italy", gold=40, silver=35, bronze=37 },
new ColumnChartData{ country= "Sweden", gold=30, silver=25, bronze=27 }
};
ViewBag.dataSource = chartData;
return View();
}
public class ColumnChartData
{
public string country;
public double gold;
public double silver;
public double bronze;
}Series
You can select a series, by setting selectionMode to series.
<ejs-chart id="container" title="Olympic Medals" selectionMode="Series">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Gold" xName="country" width="2" opacity="1" yName="gold" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="Silver" xName="country" width="2" opacity="1" yName="silver" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="bronze" xName="country" width="2" opacity="1" yName="bronze" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
</e-series-collection>
</ejs-chart>public IActionResult Index()
{
List<ColumnChartData> chartData = new List<ColumnChartData>
{
new ColumnChartData{ country= "USA", gold=50, silver=70, bronze=45 },
new ColumnChartData{ country="China", gold=40, silver= 60, bronze=55 },
new ColumnChartData{ country= "Japan", gold=70, silver= 60, bronze=50 },
new ColumnChartData{ country= "Australia", gold=60, silver= 56, bronze=40 },
new ColumnChartData{ country= "France", gold=50, silver= 45, bronze=35 },
new ColumnChartData{ country= "Germany", gold=40, silver=30, bronze=22 },
new ColumnChartData{ country= "Italy", gold=40, silver=35, bronze=37 },
new ColumnChartData{ country= "Sweden", gold=30, silver=25, bronze=27 }
};
ViewBag.dataSource = chartData;
return View();
}
public class ColumnChartData
{
public string country;
public double gold;
public double silver;
public double bronze;
}Cluster
You can select the points that corresponds to the same index in all the series, by setting selectionMode to cluster.
<ejs-chart id="container" title="Olympic Medals" selectionMode="Cluster">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Gold" xName="country" width="2" opacity="1" yName="gold" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="Silver" xName="country" width="2" opacity="1" yName="silver" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="bronze" xName="country" width="2" opacity="1" yName="bronze" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
</e-series-collection>
</ejs-chart>public IActionResult Column()
{
List<ColumnChartData> chartData = new List<ColumnChartData>
{
new ColumnChartData{ country= "USA", gold=50, silver=70, bronze=45 },
new ColumnChartData{ country="China", gold=40, silver= 60, bronze=55 },
new ColumnChartData{ country= "Japan", gold=70, silver= 60, bronze=50 },
new ColumnChartData{ country= "Australia", gold=60, silver= 56, bronze=40 },
new ColumnChartData{ country= "France", gold=50, silver= 45, bronze=35 },
new ColumnChartData{ country= "Germany", gold=40, silver=30, bronze=22 },
new ColumnChartData{ country= "Italy", gold=40, silver=35, bronze=37 },
new ColumnChartData{ country= "Sweden", gold=30, silver=25, bronze=27 }
};
ViewBag.dataSource = chartData;
return View();
}
public class ColumnChartData
{
public string country;
public double gold;
public double silver;
public double bronze;
}Rectangular selection
DragXY, DragX and DragY
To fetch the collection of data under a particular region, you have to set selectionMode as DragXY.
- DragXY - Allows us to select data with respect to horizontal and vertical axis.
- DragX - Allows us to select data with respect to horizontal axis.
- DragY - Allows us to select data with respect to vertical axis.
The selected data are returned as an array collection in the dragComplete event.
<ejs-chart id="container" title="Olympic Medals" selectionMode="DragXY">
<e-chart-primaryxaxis></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Product A" xName="xValue" opacity="1" yName="yValue" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Scatter"></e-series>
</e-series-collection>
</ejs-chart>public ActionResult Index()
{
List<RangeSelectionChartData> chartData = new List<RangeSelectionChartData>
{
new RangeSelectionChartData { xValue = 1971, yValue = 50, yValue1 = 23 },
new RangeSelectionChartData { xValue = 1972, yValue = 20, yValue1 = 67 },
new RangeSelectionChartData { xValue = 1973, yValue = 63, yValue1 = 83 },
new RangeSelectionChartData { xValue = 1974, yValue = 81, yValue1 = 43 },
new RangeSelectionChartData { xValue = 1975, yValue = 64, yValue1 = 8 },
new RangeSelectionChartData { xValue = 1976, yValue = 36, yValue1 = 41 },
new RangeSelectionChartData { xValue = 1977, yValue = 22, yValue1 = 56 },
new RangeSelectionChartData { xValue = 1978, yValue = 78, yValue1 = 31 },
new RangeSelectionChartData { xValue = 1979, yValue = 60, yValue1 = 29 },
new RangeSelectionChartData { xValue = 1980, yValue = 41, yValue1 = 87 },
new RangeSelectionChartData { xValue = 1981, yValue = 62, yValue1 = 43 },
new RangeSelectionChartData { xValue = 1982, yValue = 56, yValue1 = 12 },
new RangeSelectionChartData { xValue = 1983, yValue = 96, yValue1 = 38 },
new RangeSelectionChartData { xValue = 1984, yValue = 48, yValue1 = 67 },
new RangeSelectionChartData { xValue = 1985, yValue = 23, yValue1 = 49 },
new RangeSelectionChartData { xValue = 1986, yValue = 54, yValue1 = 67 },
new RangeSelectionChartData { xValue = 1987, yValue = 73, yValue1 = 83 },
new RangeSelectionChartData { xValue = 1988, yValue = 56, yValue1 = 16 },
new RangeSelectionChartData { xValue = 1989, yValue = 67, yValue1 = 89 },
new RangeSelectionChartData { xValue = 1990, yValue = 79, yValue1 = 18 },
new RangeSelectionChartData { xValue = 1991, yValue = 18, yValue1 = 46 },
new RangeSelectionChartData { xValue = 1992, yValue = 78, yValue1 = 39 },
new RangeSelectionChartData { xValue = 1993, yValue = 92, yValue1 = 68 },
new RangeSelectionChartData { xValue = 1994, yValue = 43, yValue1 = 87 },
new RangeSelectionChartData { xValue = 1995, yValue = 29, yValue1 = 45 },
new RangeSelectionChartData { xValue = 1996, yValue = 14, yValue1 = 42 },
new RangeSelectionChartData { xValue = 1997, yValue = 85, yValue1 = 28 },
new RangeSelectionChartData { xValue = 1998, yValue = 24, yValue1 = 82 },
new RangeSelectionChartData { xValue = 1999, yValue = 61, yValue1 = 13 },
new RangeSelectionChartData { xValue = 2000, yValue = 80, yValue1 = 83 },
new RangeSelectionChartData { xValue = 2001, yValue = 14, yValue1 = 26 },
new RangeSelectionChartData { xValue = 2002, yValue = 34, yValue1 = 57 },
new RangeSelectionChartData { xValue = 2003, yValue = 81, yValue1 = 48 },
new RangeSelectionChartData { xValue = 2004, yValue = 70, yValue1 = 84 },
new RangeSelectionChartData { xValue = 2005, yValue = 21, yValue1 = 64 },
new RangeSelectionChartData { xValue = 2006, yValue = 70, yValue1 = 24 },
new RangeSelectionChartData { xValue = 2007, yValue = 32, yValue1 = 82 },
new RangeSelectionChartData { xValue = 2008, yValue = 43, yValue1 = 37 },
new RangeSelectionChartData { xValue = 2009, yValue = 21, yValue1 = 68 },
new RangeSelectionChartData { xValue = 2010, yValue = 63, yValue1 = 37 },
new RangeSelectionChartData { xValue = 2011, yValue = 9 , yValue1 = 35},
new RangeSelectionChartData { xValue = 2012, yValue = 51, yValue1 = 81 },
new RangeSelectionChartData { xValue = 2013, yValue = 25, yValue1 = 38 },
new RangeSelectionChartData { xValue = 2014, yValue = 96, yValue1 = 51 },
new RangeSelectionChartData { xValue = 2015, yValue = 32, yValue1 = 58 }
};
ViewBag.dataSource = chartData;
return View();
}
public class RangeSelectionChartData
{
public double xValue;
public double yValue;
public double yValue1;
}
}
}Selection type
You can select multiple points or series, by enabling the isMultiSelect property.
<ejs-chart id="container" title="Olympic Medals" selectionMode="Series" isMultiSelect="true">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Gold" xName="country" width="2" opacity="1" yName="gold" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="Silver" xName="country" width="2" opacity="1" yName="silver" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
<e-series dataSource="ViewBag.dataSource" name="bronze" xName="country" width="2" opacity="1" yName="bronze" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column"></e-series>
</e-series-collection>
</ejs-chart>public IActionResult Index()
{
List<ColumnChartData> chartData = new List<ColumnChartData>
{
new ColumnChartData{ country= "USA", gold=50, silver=70, bronze=45 },
new ColumnChartData{ country="China", gold=40, silver= 60, bronze=55 },
new ColumnChartData{ country= "Japan", gold=70, silver= 60, bronze=50 },
new ColumnChartData{ country= "Australia", gold=60, silver= 56, bronze=40 },
new ColumnChartData{ country= "France", gold=50, silver= 45, bronze=35 },
new ColumnChartData{ country= "Germany", gold=40, silver=30, bronze=22 },
new ColumnChartData{ country= "Italy", gold=40, silver=35, bronze=37 },
new ColumnChartData{ country= "Sweden", gold=30, silver=25, bronze=27 }
};
ViewBag.dataSource = chartData;
return View();
}
public class ColumnChartData
{
public string country;
public double gold;
public double silver;
public double bronze;
}Selection on load
You can select a point or series programmatically on a chart using selectedDataIndexes property.
<ejs-chart id="container" title="Olympic Medals" selectionMode="Point" isMultiSelect="true">
<e-chart-selecteddataindexes>
<e-chart-selecteddataindex series="0" point="1"></e-chart-selecteddataindex>
<e-chart-selecteddataindex series="1" point="3"></e-chart-selecteddataindex>
</e-chart-selecteddataindexes>
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Gold" xName="country" width="2" opacity="1" yName="gold" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection1"></e-series>
<e-series dataSource="ViewBag.dataSource" name="Silver" xName="country" width="2" opacity="1" yName="silver" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection2"></e-series>
<e-series dataSource="ViewBag.dataSource" name="bronze" xName="country" width="2" opacity="1" yName="bronze" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection3"></e-series>
</e-series-collection>
</ejs-chart>
<style>
.chartSelection1 {
fill: red
}
.chartSelection2 {
fill: green
}
.chartSelection3 {
fill: blue
}
</style>public IActionResult Index()
{
List<ColumnChartData> chartData = new List<ColumnChartData>
{
new ColumnChartData{ country= "USA", gold=50, silver=70, bronze=45 },
new ColumnChartData{ country="China", gold=40, silver= 60, bronze=55 },
new ColumnChartData{ country= "Japan", gold=70, silver= 60, bronze=50 },
new ColumnChartData{ country= "Australia", gold=60, silver= 56, bronze=40 },
new ColumnChartData{ country= "France", gold=50, silver= 45, bronze=35 },
new ColumnChartData{ country= "Germany", gold=40, silver=30, bronze=22 },
new ColumnChartData{ country= "Italy", gold=40, silver=35, bronze=37 },
new ColumnChartData{ country= "Sweden", gold=30, silver=25, bronze=27 }
};
ViewBag.dataSource = chartData;
return View();
}
public class ColumnChartData
{
public string country;
public double gold;
public double silver;
public double bronze;
}Selection through on legend
You can able to select a point or series through on legend using toggleVisibility property. Also, use enableHighlight property for highlighting the series through legend.
<ejs-chart id="container" title="Olympic Medals" selectionMode="Point">
<e-chart-legendsettings visible="true" toggleVisibility="false" enableHighlight= "true"></e-chart-legendsettings>
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Gold" xName="country" width="2" opacity="1" yName="gold" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection1"></e-series>
<e-series dataSource="ViewBag.dataSource" name="Silver" xName="country" width="2" opacity="1" yName="silver" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection2"></e-series>
<e-series dataSource="ViewBag.dataSource" name="bronze" xName="country" width="2" opacity="1" yName="bronze" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection3"></e-series>
</e-series-collection>
</ejs-chart>public IActionResult Index()
{
List<ColumnChartData> chartData = new List<ColumnChartData>
{
new ColumnChartData{ country= "USA", gold=50, silver=70, bronze=45 },
new ColumnChartData{ country="China", gold=40, silver= 60, bronze=55 },
new ColumnChartData{ country= "Japan", gold=70, silver= 60, bronze=50 },
new ColumnChartData{ country= "Australia", gold=60, silver= 56, bronze=40 },
new ColumnChartData{ country= "France", gold=50, silver= 45, bronze=35 },
new ColumnChartData{ country= "Germany", gold=40, silver=30, bronze=22 },
new ColumnChartData{ country= "Italy", gold=40, silver=35, bronze=37 },
new ColumnChartData{ country= "Sweden", gold=30, silver=25, bronze=27 }
};
ViewBag.dataSource = chartData;
return View();
}
public class ColumnChartData
{
public string country;
public double gold;
public double silver;
public double bronze;
}Customization for selection
You can apply custom style to selected points or series with selectionStyle property.
<ejs-chart id="container" title="Olympic Medals" selectionMode="Point" isMultiSelect="true">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Gold" xName="country" width="2" opacity="1" yName="gold" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection1"></e-series>
<e-series dataSource="ViewBag.dataSource" name="Silver" xName="country" width="2" opacity="1" yName="silver" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection2"></e-series>
<e-series dataSource="ViewBag.dataSource" name="bronze" xName="country" width="2" opacity="1" yName="bronze" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Column" selectionStyle="chartSelection3"></e-series>
</e-series-collection>
</ejs-chart>
<style>
.chartSelection1 {
fill: red
}
.chartSelection2 {
fill: green
}
.chartSelection3 {
fill: blue
}
</style>public IActionResult Index()
{
List<ColumnChartData> chartData = new List<ColumnChartData>
{
new ColumnChartData{ country= "USA", gold=50, silver=70, bronze=45 },
new ColumnChartData{ country="China", gold=40, silver= 60, bronze=55 },
new ColumnChartData{ country= "Japan", gold=70, silver= 60, bronze=50 },
new ColumnChartData{ country= "Australia", gold=60, silver= 56, bronze=40 },
new ColumnChartData{ country= "France", gold=50, silver= 45, bronze=35 },
new ColumnChartData{ country= "Germany", gold=40, silver=30, bronze=22 },
new ColumnChartData{ country= "Italy", gold=40, silver=35, bronze=37 },
new ColumnChartData{ country= "Sweden", gold=30, silver=25, bronze=27 }
};
ViewBag.dataSource = chartData;
return View();
}
public class ColumnChartData
{
public string country;
public double gold;
public double silver;
public double bronze;
}