Spline in ASP.NET MVC Charts Component
30 Sep 202424 minutes to read
Spline
To render a spline series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:
-
Set the series type: Define the series
Type
as Spline in your chart configuration. This indicates that the series should be represented as a smooth curve, connecting data points with a spline rather than straight lines.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
Name("Gold").
Add();
}).PrimaryXAxis(px =>
px.Interval(1)
.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
.IsIndexed(true)
).Title("Olympic Medal Counts - RIO").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
}
Binding data with series
You can bind data to the chart using the DataSource
property within the series configuration. This allows you to connect a JSON dataset or remote data to your chart. To display the data correctly, map the fields from the data to the chart series XName
and YName
properties.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
Name("Gold").
Add();
}).PrimaryXAxis(px =>
px.Interval(1)
.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
.IsIndexed(true)
).Title("Olympic Medal Counts - RIO").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
}
Spline type
Use the SplineType
to define the type of the spline series. The default type is Natural, which creates a smooth curve through the data points.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
SplineType(Syncfusion.EJ2.Charts.SplineType.Cardinal).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
Add();
}).PrimaryXAxis(px => px.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)).Title("Olympic Medals").Width("60%").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
}
Series customization
The following properties can be used to customize the spline
series.
Fill
The Fill
property determines the color applied to the series.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
Fill("blue").
Add();
}).PrimaryXAxis(px => px.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)).Title("Olympic Medals").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
}
The Fill
property can be used to apply a gradient color to the spline series. By configuring this property with gradient values, you can create a visually appealing effect in which the color transitions smoothly from one shade to another.
<svg style="width:1px; height:1px">
<defs>
<linearGradient id="gradient">
<stop offset="0%" style="stop-color:#FF0000;stop-opacity:5" />
<stop offset="70%" style="stop-color:#00FF00;stop-opacity:5" />
</linearGradient>
</defs>
</svg>
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
Fill("url(#gradient)").
Add();
}).PrimaryXAxis(px => px.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)).Title("Olympic Medals").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
}
Opacity
The Opacity
property specifies the transparency level of the fill. Adjusting this property allows you to control how opaque or transparent the fill color of the series appears.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
Opacity(0.5).
Add();
}).PrimaryXAxis(px => px.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)).Title("Olympic Medals").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
public string color;
}
Dash array
The DashArray
property determines the pattern of dashes and gaps in the series.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
DashArray("5,5").
Add();
}).PrimaryXAxis(px => px.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)).Title("Olympic Medals").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
public string color;
}
Width
The Width
property specifies the stroke width applied to the series.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("x").
YName("y").
DataSource(ViewBag.dataSource).
Width(4).
Add();
}).PrimaryXAxis(px => px.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)).Title("Olympic Medals").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { x= "South Korea", y= 39.4 },
new AxisLabelData { x= "India", y= 61.3 },
new AxisLabelData { x= "Pakistan", y= 20.4 },
new AxisLabelData { x= "Germany", y= 65.1 },
new AxisLabelData { x= "Australia", y= 15.8 },
new AxisLabelData { x= "Italy", y= 29.2 },
new AxisLabelData { x= "United Kingdom", y= 44.6 },
new AxisLabelData { x= "Saudi Arabia", y= 9.7 },
new AxisLabelData { x= "Russia", y= 40.8 },
new AxisLabelData { x= "Mexico", y= 31 },
new AxisLabelData { x= "Brazil", y= 75.9 },
new AxisLabelData { x= "China", y= 51.4 }
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string x;
public double y;
public string color;
}
Empty points
Data points with null or undefined values are considered empty. Empty data points are ignored and not plotted on the chart.
Mode
Use the Mode
property to define how empty or missing data points are handled in the series. The default mode for empty points is Gap.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("month").
YName("sales").
DataSource(ViewBag.dataSource).
Name("Gold").EmptyPointSettings(ViewBag.emptyPoint).
Add();
}).PrimaryXAxis(px =>
px.Interval(1)
.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
.IsIndexed(true)
).Title("Olympic Medal Counts - RIO").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { month = "Jan", sales = 35 },
new AxisLabelData { month = "Feb", sales = 28 },
new AxisLabelData { month = "Mar", sales = 34 },
new AxisLabelData { month = "Apr", sales = null },
new AxisLabelData { month = "May", sales = 40 },
new AxisLabelData { month = "Jun", sales = 32 },
new AxisLabelData { month = "Jul", sales = 35 },
new AxisLabelData { month = "Aug" },
new AxisLabelData { month = "Sep", sales = 38 },
new AxisLabelData { month = "Oct", sales = 30 },
new AxisLabelData { month = "Nov", sales = 25 },
new AxisLabelData { month = "Dec", sales = 32 },
};
ViewBag.dataSource = chartData;
ChartEmptyPointSettings chartEmptyPointSettings = new ChartEmptyPointSettings();
chartEmptyPointSettings.Mode = EmptyPointMode.Zero;
ViewBag.emptyPoint = chartEmptyPointSettings;
return View();
}
public class AxisLabelData
{
public string month;
public double? sales;
}
Fill
Use the Fill
property to customize the fill color of empty points in the series.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("month").
YName("sales").
DataSource(ViewBag.dataSource).
Name("Gold").EmptyPointSettings(ViewBag.emptyPoint).
Marker(ViewBag.marker).
Add();
}).PrimaryXAxis(px =>
px.Interval(1)
.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
.IsIndexed(true)
).Title("Olympic Medal Counts - RIO").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { month = "Jan", sales = 35 },
new AxisLabelData { month = "Feb", sales = 28 },
new AxisLabelData { month = "Mar", sales = 34 },
new AxisLabelData { month = "Apr", sales = null },
new AxisLabelData { month = "May", sales = 40 },
new AxisLabelData { month = "Jun", sales = 32 },
new AxisLabelData { month = "Jul", sales = 35 },
new AxisLabelData { month = "Aug" },
new AxisLabelData { month = "Sep", sales = 38 },
new AxisLabelData { month = "Oct", sales = 30 },
new AxisLabelData { month = "Nov", sales = 25 },
new AxisLabelData { month = "Dec", sales = 32 },
};
ViewBag.dataSource = chartData;
ChartEmptyPointSettings chartEmptyPointSettings = new ChartEmptyPointSettings();
chartEmptyPointSettings.Mode = EmptyPointMode.Zero;
chartEmptyPointSettings.Fill = "red";
ViewBag.emptyPoint = chartEmptyPointSettings;
ChartMarkerSettings marker = new ChartMarkerSettings();
marker.Visible = true;
marker.Width = 7;
marker.Height = 7;
marker.IsFilled = true;
ViewBag.marker = marker;
return View();
}
public class AxisLabelData
{
public string month;
public double? sales;
}
Border
Use the Border
property to customize the width and color of the border for empty points.
@Html.EJS().Chart("container").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("month").
YName("sales").
DataSource(ViewBag.dataSource).
Name("Gold").EmptyPointSettings(ViewBag.emptyPoint).
Marker(ViewBag.marker).
Add();
}).PrimaryXAxis(px =>
px.Interval(1)
.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
.IsIndexed(true)
).Title("Olympic Medal Counts - RIO").Render()
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { month = "Jan", sales = 35 },
new AxisLabelData { month = "Feb", sales = 28 },
new AxisLabelData { month = "Mar", sales = 34 },
new AxisLabelData { month = "Apr", sales = null },
new AxisLabelData { month = "May", sales = 40 },
new AxisLabelData { month = "Jun", sales = 32 },
new AxisLabelData { month = "Jul", sales = 35 },
new AxisLabelData { month = "Aug" },
new AxisLabelData { month = "Sep", sales = 38 },
new AxisLabelData { month = "Oct", sales = 30 },
new AxisLabelData { month = "Nov", sales = 25 },
new AxisLabelData { month = "Dec", sales = 32 },
};
ViewBag.dataSource = chartData;
ChartEmptyPointSettings chartEmptyPointSettings = new ChartEmptyPointSettings();
chartEmptyPointSettings.Mode = EmptyPointMode.Zero;
chartEmptyPointSettings.Fill = "red";
chartEmptyPointSettings.Border.Width = 2;
chartEmptyPointSettings.Border.Color = "green";
ViewBag.emptyPoint = chartEmptyPointSettings;
ChartMarkerSettings marker = new ChartMarkerSettings();
marker.Visible = true;
marker.Width = 7;
marker.Height = 7;
marker.IsFilled = true;
ViewBag.marker = marker;
return View();
}
public class AxisLabelData
{
public string month;
public double? sales;
}
Events
Series render
The SeriesRender
event allows you to customize series properties, such as data, fill, and name, before they are rendered on the chart.
@Html.EJS().Chart("container").SeriesRender("changeColor").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("month").
YName("sales").
DataSource(ViewBag.dataSource).
Name("Gold").Width(2).
Add();
}).PrimaryXAxis(px =>
px.Interval(1)
.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
.IsIndexed(true)
).Title("Olympic Medal Counts - RIO").Render()
<script>
function changeColor(args) {
args.fill = '#ff6347';
}
</script>
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { month = "Jan", sales = 35 },
new AxisLabelData { month = "Feb", sales = 28 },
new AxisLabelData { month = "Mar", sales = 34 },
new AxisLabelData { month = "Apr", sales = 30 },
new AxisLabelData { month = "May", sales = 40 },
new AxisLabelData { month = "Jun", sales = 32 },
new AxisLabelData { month = "Jul", sales = 35 },
new AxisLabelData { month = "Aug", sales = 43 },
new AxisLabelData { month = "Sep", sales = 38 },
new AxisLabelData { month = "Oct", sales = 30 },
new AxisLabelData { month = "Nov", sales = 25 },
new AxisLabelData { month = "Dec", sales = 32 },
};
ViewBag.dataSource = chartData;
return View();
}
public class AxisLabelData
{
public string month;
public double? sales;
}
Point render
The PointRender
event allows you to customize each data point before it is rendered on the chart.
@Html.EJS().Chart("container").PointRender("changeColor").Series(series =>
{
series.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Spline).
XName("month").
YName("sales").
DataSource(ViewBag.dataSource).
Name("Gold").Width(2).
Marker(ViewBag.marker).
Add();
}).PrimaryXAxis(px =>
px.Interval(1)
.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
.IsIndexed(true)
).Title("Olympic Medal Counts - RIO").Render()
<script>
function changeColor(args) {
if (args.point.index % 2 !== 0) {
args.fill = '#ff6347';
}
else {
args.fill = '#009cb8';
}
}
</script>
public ActionResult Index()
{
List<AxisLabelData> chartData = new List<AxisLabelData>
{
new AxisLabelData { month = "Jan", sales = 35 },
new AxisLabelData { month = "Feb", sales = 28 },
new AxisLabelData { month = "Mar", sales = 34 },
new AxisLabelData { month = "Apr", sales = 30 },
new AxisLabelData { month = "May", sales = 40 },
new AxisLabelData { month = "Jun", sales = 32 },
new AxisLabelData { month = "Jul", sales = 35 },
new AxisLabelData { month = "Aug", sales = 43 },
new AxisLabelData { month = "Sep", sales = 38 },
new AxisLabelData { month = "Oct", sales = 30 },
new AxisLabelData { month = "Nov", sales = 25 },
new AxisLabelData { month = "Dec", sales = 32 },
};
ViewBag.dataSource = chartData;
ChartMarkerSettings chartMarkerSettings = new ChartMarkerSettings();
chartMarkerSettings.Visible = true;
chartMarkerSettings.IsFilled = true;
chartMarkerSettings.Height = 7;
chartMarkerSettings.Width = 7;
ViewBag.marker = chartMarkerSettings;
return View();
}
public class AxisLabelData
{
public string month;
public double? sales;
}