How to dynamically change the x-axis interval type in Blazor Charts?

This article explains how to dynamically change the x-axis interval type in Blazor Charts.

Dynamically Change the X-Axis Interval Type

Blazor Charts provides an option to dynamically change the x-axis interval type.

This can be achieved by using the OnZoomEnd event. This event allows you to modify the x-axis IntervalType, based on conditions that check the ZoomFactor and the IsDay boolean.

The below code example demonstrates how to dynamically change the x-axis interval type

Index.razor

@using Syncfusion.Blazor.Charts

<SfChart>
   <ChartPrimaryXAxis LabelFormat="@LabelFormat" Interval="2" IntervalType="@Type" ValueType="Syncfusion.Blazor.Charts.ValueType.DateTime">
   </ChartPrimaryXAxis>
   <ChartEvents OnZoomEnd="OnZoomingEvent"></ChartEvents>
   <ChartPrimaryYAxis Minimum="0" Maximum="25000" Interval="5000" ValueType="Syncfusion.Blazor.Charts.ValueType.Double">
   </ChartPrimaryYAxis>
   <ChartZoomSettings EnableMouseWheelZooming="true" EnablePinchZooming="true" EnableSelectionZooming="true"></ChartZoomSettings>
   <ChartSeriesCollection>
       <ChartSeries DataSource="@DataSource" XName="XValue" YName="YValue" Type="Syncfusion.Blazor.Charts.ChartSeriesType.Column">
       </ChartSeries>
   </ChartSeriesCollection>
</SfChart>

@code {
   public class ChartData
   {
       public DateTime XValue { get; set; }
       public double YValue { get; set; }
   }

   public string LabelFormat { get; set; } = "yyyy-MM";

   public IntervalType Type { get; set; } = IntervalType.Months;

   public bool IsDay { get; set; } = true;

   public List<ChartData> DataSource = new List<ChartData>
   {
       new ChartData { XValue = new DateTime(2023, 01, 01), YValue = 15243 },
       new ChartData { XValue = new DateTime(2023, 02, 16), YValue = 24324 },
       new ChartData { XValue = new DateTime(2023, 03, 23), YValue = 3422 },
       new ChartData { XValue = new DateTime(2023, 04, 14), YValue = 5232 },
       new ChartData { XValue = new DateTime(2023, 05, 06), YValue = 12535 },
       new ChartData { XValue = new DateTime(2023, 06, 26), YValue = 22343 },
       new ChartData { XValue = new DateTime(2023, 07, 30), YValue = 19082 },
       new ChartData { XValue = new DateTime(2023, 08, 21), YValue = 12343 },
       new ChartData { XValue = new DateTime(2023, 09, 15), YValue = 7002 },
       new ChartData { XValue = new DateTime(2023, 10, 19), YValue = 8023 },
       new ChartData { XValue = new DateTime(2023, 11, 21), YValue = 15643 },
       new ChartData { XValue = new DateTime(2023, 12, 12), YValue = 3123 },
   };

   public void OnZoomingEvent(Syncfusion.Blazor.Charts.ZoomingEventArgs args)
   {

       if (args.AxisCollection[0].ZoomFactor < 0.7 && IsDay)
       {
           Type = IntervalType.Days;
           IsDay = false;
           LabelFormat = "dd-MM-yyyy";

           DataSource = new List<ChartData>
           {
               new ChartData { XValue = new DateTime(2023, 04, 01), YValue = 15243 },
               new ChartData { XValue = new DateTime(2023, 04, 16), YValue = 24324 },
               new ChartData { XValue = new DateTime(2023, 04, 23), YValue = 3422 },
               new ChartData { XValue = new DateTime(2023, 04, 14), YValue = 5232 },
               new ChartData { XValue = new DateTime(2023, 04, 06), YValue = 12535 },
               new ChartData { XValue = new DateTime(2023, 04, 26), YValue = 12323 },
               new ChartData { XValue = new DateTime(2023, 04, 03), YValue = 14325 },
               new ChartData { XValue = new DateTime(2023, 04, 12), YValue = 24213 },
               new ChartData { XValue = new DateTime(2023, 04, 23), YValue = 24343 },
               new ChartData { XValue = new DateTime(2023, 04, 30), YValue = 19082 },
            };

           StateHasChanged();
       }
       else if (!IsDay)
       {
           Type = IntervalType.Months;
           IsDay = true;
           LabelFormat = "yyyy-MM";
           DataSource = new List<ChartData>
           {
               new ChartData { XValue = new DateTime(2023, 01, 01), YValue = 15243 },
               new ChartData { XValue = new DateTime(2023, 02, 16), YValue = 24324 },
               new ChartData { XValue = new DateTime(2023, 03, 23), YValue = 3422 },
               new ChartData { XValue = new DateTime(2023, 04, 14), YValue = 5232 },
               new ChartData { XValue = new DateTime(2023, 05, 06), YValue = 12535 },
               new ChartData { XValue = new DateTime(2023, 06, 26), YValue = 22343 },
               new ChartData { XValue = new DateTime(2023, 07, 30), YValue = 19082 },
               new ChartData { XValue = new DateTime(2023, 08, 21), YValue = 12343 },
               new ChartData { XValue = new DateTime(2023, 09, 15), YValue = 7002 },
               new ChartData { XValue = new DateTime(2023, 10, 19), YValue = 8023 },
               new ChartData { XValue = new DateTime(2023, 11, 21), YValue = 15643 },
               new ChartData { XValue = new DateTime(2023, 12, 12), YValue = 3123 },
           };

           StateHasChanged();
       }
   }
}

The following screenshot illustrates the output of the code snippet.

Live sample for dynamically change the x-axis interval type

Conclusion

I hope you enjoyed learning how to dynamically change the x-axis interval type in Blazor Charts.

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

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