How to Display Total value on a Stacked Column in Blazor Charts?

Overview

This article explains how to display the total value on top of a stacked column chart and inside the tooltip using Syncfusion Blazor Charts.

To achieve this:

• Use the SharedTooltipRender event to access the stacked values and append the total to the tooltip content.
• Set the Position property of the ChartDataLabel to Outer to render the total value on top of the stacked columns.
• Adjust the vertical position of the label using the OnDataLabelRender event for improved visibility.

Code Example

@using Syncfusion.Blazor.Charts

<SfChart>
   <ChartPrimaryXAxis ValueType="Syncfusion.Blazor.Charts.ValueType.Category"></ChartPrimaryXAxis>
   <ChartEvents OnDataLabelRender="DatalabelRender" SharedTooltipRender="TooltipRenderEvent"></ChartEvents>
   <ChartTooltipSettings EnableMarker=false Enable="true" Shared="true"></ChartTooltipSettings>
   <ChartSeriesCollection>
       <ChartSeries Name="YValue" DataSource="@DataSource" XName="X" DashArray="5,5" Fill="blue" Opacity="0.7" YName="YValue" Type="Syncfusion.Blazor.Charts.ChartSeriesType.StackingColumn">
       </ChartSeries>
       <ChartSeries Name="YValue1" DataSource="@DataSource" XName="X" DashArray="5,5" Fill="green" Opacity="0.7" YName="YValue1" Type="Syncfusion.Blazor.Charts.ChartSeriesType.StackingColumn">
           <ChartMarker>
               <ChartDataLabel Visible="true" Name="Total" Position="Syncfusion.Blazor.Charts.LabelPosition.Outer">
                   <ChartDataLabelFont Color="black"></ChartDataLabelFont>
               </ChartDataLabel>
           </ChartMarker>
       </ChartSeries>
   </ChartSeriesCollection>
   <ChartLegendSettings Visible="false"></ChartLegendSettings>
</SfChart>

@code {
   public void TooltipRenderEvent(SharedTooltipRenderEventArgs args)
   {
       args.Text.Add("Total : " + args.Data[1].PointText);
   }
   public class ChartData
   {
       public string X { get; set; }
       public double YValue { get; set; }
       public double YValue1 { get; set; }
       public double Total { get; set; }
   }

   public List<ChartData> DataSource = new List<ChartData>
   {
       new ChartData { X= "USA", YValue= 46, YValue1=56, Total = 102 },
       new ChartData { X= "GBR", YValue= 27, YValue1=17, Total = 44 },
       new ChartData { X= "CHN", YValue= 26, YValue1=36, Total = 62 },
       new ChartData { X= "UK", YValue= 56,  YValue1=16, Total = 72 },
       new ChartData { X= "AUS", YValue= 12, YValue1=46 , Total = 58},
       new ChartData { X= "IND", YValue= 26, YValue1=16 , Total = 42},
       new ChartData { X= "DEN", YValue= 26, YValue1=12 , Total = 38},
       new ChartData { X= "MEX", YValue= 34, YValue1=32, Total = 66},
   };

   void DatalabelRender(Syncfusion.Blazor.Charts.TextRenderEventArgs args)
   {
       args.Location.Y -= 20;
   }
} 

Screenshot

The following screenshot illustrates the output of the above code:

Live Sample

Live Sample – Display total value on top of a stacked column chart and inside the tooltip

Conclusion:

We hope you found this guide helpful in learning How to Display Total value on a Stacked Column in Blazor Charts. For more features, visit our [Blazor Charts feature tour page to learn about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our [Blazor Charts example to understand how to create and manipulate data.

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