Candle in ASP.NET Core Charts Component
8 Oct 202424 minutes to read
To get started with the ASP.NET Core Candle charts, you can check on this video:
Candle
The Candle series, similar to the Hilo Open Close series, is used to represent the low, high, open, and closing prices over time. It is commonly used in financial charts to visualize stock price movements.
To render a candle 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
typeas Candle in your chart configuration. This indicates that the data should be represented as a candle chart, providing a detailed view of stock price fluctuations by displaying the high, low, open, and close values for each time period. -
Provide high, low, open, and close values: The Candle series requires five fields (x, high, low, open, and close) to accurately display the stock’s high, low, open, and close prices. Ensure that your data source includes these fields to create a detailed representation of stock price movements over time.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" high="high" low="low" open="open" close="close"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Candle">
</e-series>
</e-series-collection>
</ejs-chart>public ActionResult Index()
{
List<Data> chartData = new List<Data>
{
new Data{ x= "Jan", open= 120, high= 160, low= 100, close= 140 },
new Data{ x= "Feb", open= 150, high= 190, low= 130, close= 170 },
new Data{ x= "Mar", open= 130, high= 170, low= 110, close= 150 },
new Data{ x= "Apr", open= 160, high= 180, low= 120, close= 140 },
new Data{ x= "May", open= 150, high= 170, low= 110, close= 130 }
};
ViewBag.dataSource = chartData;
return View();
}
public class Data
{
public string x;
public double y;
public double high;
public double low;
public double open;
public double close;
}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, high, low, open and close properties.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" high="high" low="low" open="open" close="close"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Candle">
</e-series>
</e-series-collection>
</ejs-chart>public ActionResult Index()
{
List<Data> chartData = new List<Data>
{
new Data{ x= "Jan", open= 120, high= 160, low= 100, close= 140 },
new Data{ x= "Feb", open= 150, high= 190, low= 130, close= 170 },
new Data{ x= "Mar", open= 130, high= 170, low= 110, close= 150 },
new Data{ x= "Apr", open= 160, high= 180, low= 120, close= 140 },
new Data{ x= "May", open= 150, high= 170, low= 110, close= 130 }
};
ViewBag.dataSource = chartData;
return View();
}
public class Data
{
public string x;
public double y;
public double high;
public double low;
public double open;
public double close;
}Hollow Candles
Hollow candles in candle charts allow you to visually compare the current price with the previous price by coloring them differently. The candles are filled or left hollow based on the following criteria:
| States | Description |
| Filled | Candlesticks are filled when the close value is less than the open value. |
| Unfilled | Candlesticks are unfilled when the close value is greater than the open value. |
The color of the candle will be defined by comparing it with previous values. The bear color will be applied when the current closing value is greater than the previous closing value. The bull color will be applied when the current closing value is less than the previous closing value.
By default, the bullFillColor is set to red and the bearFillColor is set to green.
Solid Candles
The enableSolidCandles property is used to enable or disable solid candles. By default, it is set to false. The fill color of the candle will be determined by its opening and closing values.
- The
bearFillColorwill be applied when the opening value is less than the closing value. - The
bullFillColorwill be applied when the opening value is greater than the closing value.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" bearFillColor="#e56590" bullFillColor="#f8b883" xName="x" high="high" low="low" open="open" close="close"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Candle">
</e-series>
</e-series-collection>
</ejs-chart>public ActionResult Index()
{
List<Data> chartData = new List<Data>
{
new Data{ x= "Jan", open= 120, high= 160, low= 100, close= 140 },
new Data{ x= "Feb", open= 150, high= 190, low= 130, close= 170 },
new Data{ x= "Mar", open= 130, high= 170, low= 110, close= 150 },
new Data{ x= "Apr", open= 160, high= 180, low= 120, close= 140 },
new Data{ x= "May", open= 150, high= 170, low= 110, close= 130 }
};
ViewBag.dataSource = chartData;
return View();
}
public class Data
{
public string x;
public double y;
public double high;
public double low;
public double open;
public double close;
}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.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" high="high" low="low" open="open" close="close"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Candle">
<e-series-emptypointSettings mode="Average"></e-series-emptypointSettings>
</e-series>
</e-series-collection>
</ejs-chart>public ActionResult Index()
{
List<Data> chartData = new List<Data>
{
new Data{ x= "Jan", open= 120, high= 160, low= 100, close= 140 },
new Data{ x= "Feb", open= null, high= 190, low= 130, close= 170 },
new Data{ x= "Mar", open= 130, high= 170, low= 110, close= 150 },
new Data{ x= "Apr", open= 160, high= 180, low= null, close= 140 },
new Data{ x= "May", open= 150, high= 170, low= 110, close= 130 }
};
ViewBag.dataSource = chartData;
return View();
}
public class Data
{
public string x;
public double y;
public double high;
public double low;
public double open;
public double close;
}Fill
Use the fill property to customize the fill color of empty points in the series.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" high="high" low="low" open="open" close="close"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Candle">
<e-series-emptypointSettings mode="Average" fill="red"></e-series-emptypointSettings>
</e-series>
</e-series-collection>
</ejs-chart>public ActionResult Index()
{
List<Data> chartData = new List<Data>
{
new Data{ x= "Jan", open= 120, high= 160, low= 100, close= 140 },
new Data{ x= "Feb", open= null, high= 190, low= 130, close= 170 },
new Data{ x= "Mar", open= 130, high= 170, low= 110, close= 150 },
new Data{ x= "Apr", open= 160, high= 180, low= null, close= 140 },
new Data{ x= "May", open= 150, high= 170, low= 110, close= 130 }
};
ViewBag.dataSource = chartData;
return View();
}
public class Data
{
public string x;
public double y;
public double high;
public double low;
public double open;
public double close;
}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.
<ejs-chart id="container" seriesRender="changeColor">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" high="high" low="low" open="open" close="close"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Candle">
</e-series>
</e-series-collection>
</ejs-chart>
<script>
function changeColor(args) {
args.series.bearFillColor = '#ff6347';
args.series.bullFillColor = '#009cb8';
}
</script>public ActionResult Index()
{
List<Data> chartData = new List<Data>
{
new Data{ x= "Jan", open= 120, high= 160, low= 100, close= 140 },
new Data{ x= "Feb", open= 150, high= 190, low= 130, close= 170 },
new Data{ x= "Mar", open= 130, high= 170, low= 110, close= 150 },
new Data{ x= "Apr", open= 160, high= 180, low= 120, close= 140 },
new Data{ x= "May", open= 150, high= 170, low= 110, close= 130 }
};
ViewBag.dataSource = chartData;
return View();
}
public class Data
{
public string x;
public double y;
public double high;
public double low;
public double open;
public double close;
}Point render
The pointRender event allows you to customize each data point before it is rendered on the chart.
<ejs-chart id="container" pointRender="changeColor">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" high="high" low="low" open="open" close="close"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Candle">
</e-series>
</e-series-collection>
</ejs-chart>
<script>
function changeColor(args) {
if (args.point.index % 2 !== 0) {
args.fill = '#ff6347';
}
else {
args.fill = '#009cb8';
}
}
</script>public ActionResult Index()
{
List<Data> chartData = new List<Data>
{
new Data{ x= "Jan", open= 120, high= 160, low= 100, close= 140 },
new Data{ x= "Feb", open= 150, high= 190, low= 130, close= 170 },
new Data{ x= "Mar", open= 130, high= 170, low= 110, close= 150 },
new Data{ x= "Apr", open= 160, high= 180, low= 120, close= 140 },
new Data{ x= "May", open= 150, high= 170, low= 110, close= 130 }
};
ViewBag.dataSource = chartData;
return View();
}
public class Data
{
public string x;
public double y;
public double high;
public double low;
public double open;
public double close;
}