Customising ChartTypes class

[oleksiizapara]

I found a great extension for chartJS which allows to create candlestick chart. https://github.com/chartjs/chartjs-chart-financial

I tired to implement Blazor extension version based on ChartJs.Blazor, However, I found that I cannot add additional ChartTypes. I used reflection to create valid objects.

public static class ChartTypeFactory
 {
     public static ChartTypes CreateCandlestick() =>
      Construct<ChartTypes>(
          new Type[] { typeof(string) },
          new object[] { "candlestick" }
      );

     public static ChartTypes CreateOhlc() =>
     Construct<ChartTypes>(
         new Type[] { typeof(string) },
         new object[] { "ohlc" }
     );

     public static T Construct<T>(Type[] paramTypes, object[] paramValues)
     {
         Type t = typeof(T);

         ConstructorInfo ci = t.GetConstructor(
             BindingFlags.Instance | BindingFlags.NonPublic,
             null, paramTypes, null);

         return (T)ci.Invoke(paramValues);
     }
 }

The sample project with candlestick chart can be access via link https://github.com/oleksiizapara/ChartJsBlazorFinancialSample

I hope that in future release the library will be able to do it straightforward.

May be it can be done via base class that can be inherited?

[SeppPenner]

If I was you, I would take a look at https://github.com/Joelius300/ChartJSBlazor. This project is maintained at least.

[Joelius300]

We should add a ChartType.Custom(string chartType) method to the ChartType-'enum' with a summary along the lines of

This method constructs a <see cref="ChartType" /> which represents the given value. Only use this method if you're implementing your own chart e.g. for a chart.js extension, otherwise use the given values.

I'm adding this to the backlog so it can be added in a feature release.