How to add a ChartPoint that is customized data type?

[UMLer]

below is sample source code:

ChartSeries series = new ChartSeries("series", ChartSeriesType.Candle);

series.Points.Add(1, 10, 6, 7, 8);

so there is ChartPoint object add to chart. I defined a new class like below:

class MyChartPoint :  ChartPoint

{

   ...

}

then create a object of  MyChartPoint. let's say the object varaible is myObj. then add to chart like below:

int index = series.Points.Add(myObj);

it works but when i try to get ChartPoint object like below:

MyChartPoint p =  series.Points[index] as MyChartPoint;

but p is null.

so how to add a chart point that is my data 

 

[Devakumar Dhanapoosanam]

Hi UMLer, 

 

Query: How to add a chart point that is my data 

 

We can add a chart datapoint with customized model using the CharDataBindModel class and set it to the SeriesModel property of series as per the below code example. 

 

public class MyChartPoint 

{ 

    public int XValue { get; set; } 

    public double High { get; set; } 

    public double Low { get; set; } 

    public double Open { get; set; } 

    public double Close { get; set; }

 

    public MyChartPoint(int xValue, double high, double low, double open, double close) 

    { 

        XValue = xValue; 

        High = high; 

        Low = low; 

        Open = open; 

        Close = close; 

    } 

} 

 

private BindingList<MyChartPoint> dataSource;
… 

dataSource = new BindingList<MyChartPoint>(); 

 

dataSource.Add(new MyChartPoint(1, 10, 6, 7, 8)); 

dataSource.Add(new MyChartPoint(2, 10, 6, 8, 7)); 

dataSource.Add(new MyChartPoint(3, 8, 3, 7, 6)); 

dataSource.Add(new MyChartPoint(4, 16, 9, 11, 14)); 

dataSource.Add(new MyChartPoint(5, 18, 11, 13, 16)); 

dataSource.Add(new MyChartPoint(6, 10, 3, 7, 4)); 

dataSource.Add(new MyChartPoint(7, 19, 6, 12, 9)); 

 

ChartDataBindModel dataSeriesModel = new ChartDataBindModel(dataSource); 

dataSeriesModel.XName = "XValue"; 

dataSeriesModel.YNames = new string[] { "High", "Low", "Open", "Close" }; 

 

ChartSeries series = new ChartSeries("Candle"); 

series.Type = ChartSeriesType.Candle; 

series.SeriesModel = dataSeriesModel; 

this.chartControl1.Series.Add(series); 

 

Query: when i try to get ChartPoint object, it returns null. 

 

//now you can get the custom data object directly using the dataSource  

MyChartPoint p = dataSource[index]; 

 

Also, we have prepared a sample and you can download from below link. 

 

Sample: https://www.syncfusion.com/downloads/support/forum/173183/ze/173183834082675.zip  

 

Please refer the below link for more details and let us know if you need any further assistance on this. 

 

https://help.syncfusion.com/windowsforms/chart/chart-data#chart-data-binding-with-ienumerable 

https://help.syncfusion.com/windowsforms/chart/faq/how-to-customize-the-data-points-for-chart-series  

https://help.syncfusion.com/windowsforms/chart/getting-started#populate-chart-with-data  

 

Regards, 

Devakumar D