How to apply different colors for each data point in Blazor Charts?

This article explains how to apply different colors to each data point in Blazor Charts using an event.

Customizing the Color of Data Points Using an Event:

Blazor Charts provides an option to apply colors for each point in a chart series using the OnPointRender event.

This can be achieved by defining the required colors as an array of strings and assigning each color to the Fill argument by incrementing the count in the OnPointRender event for each point.

The code example below demonstrates how to apply different colors to each data point.

Index.razor:

@using Syncfusion.Blazor.Charts
<SfChart Title="Olympic Medals">
   <ChartEvents OnPointRender="PointRenderEvent"></ChartEvents>
   <ChartPrimaryXAxis ValueType="Syncfusion.Blazor.Charts.ValueType.Category"></ChartPrimaryXAxis>
   <ChartSeriesCollection>
       <ChartSeries DataSource="@MedalDetails" XName="X" YName="Y"  Type="Syncfusion.Blazor.Charts.ChartSeriesType.Column">
       </ChartSeries>
   </ChartSeriesCollection>
</SfChart>

@code {
   public string[] colors = new string[] {"red", "green", "#ff0097","crimson", "blue", "darkorange" };
   int i = 0;
   public class ChartData
   {
       public string X { get; set; }
       public double Y { get; set; }
   }
   public List<ChartData> MedalDetails = new List<ChartData>
   {
       new ChartData { X= "South Korea", Y= 39.4 },
       new ChartData { X= "India", Y= 61.3 },
       new ChartData { X= "Pakistan", Y= 20.4 },
       new ChartData { X= "Germany", Y= 65.1 },
       new ChartData { X= "Australia", Y= 15.8 },
       new ChartData { X= "Italy", Y= 29.2 },
   };
   public void PointRenderEvent(PointRenderEventArgs args)
   {
       if (i >= MedalDetails.Count)
           i = 0;
       args.Fill = colors[i];
       i++;
   }
}

The following screenshot illustrates the output of the code snippet.

Output:

Live Sample for Customizing Point Color

Conclusion:

We hope you enjoyed learning how to apply different colors to each data point using an event in the Blazor Chart component.

You can refer to our Blazor Chart feature tour page to learn about its other groundbreaking features, documentation, and how to quickly get started with configuration specifications. You can also explore our Blazor Chart example to understand how to create and manipulate data.

For current customers, our Blazor components are available on the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to evaluate our Blazor Charts and other Blazor components.

If you have any questions or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, support portal, or feedback portal. We are always happy to assist you!