Getting Started with Blazor Sparkline Component

1 Sep 20239 minutes to read

This section briefly explains about how to include Blazor Sparkline component in your Blazor Server App and Blazor WebAssembly App using Visual Studio.

Prerequisites

Create a new Blazor App in Visual Studio

You can create a Blazor Server App or Blazor WebAssembly App using Visual Studio via Microsoft Templates or the Syncfusion Blazor Extension.

Install Syncfusion Blazor Sparkline NuGet in the App

To add Blazor Sparkline component in the app, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search and install Syncfusion.Blazor.Sparkline. Alternatively, you can utilize the following package manager command to achieve the same.

Install-Package Syncfusion.Blazor.Sparkline -Version 23.1.36

NOTE

Syncfusion Blazor components are available in nuget.org. Refer to NuGet packages topic for available NuGet packages list with component details.

Register Syncfusion Blazor Service

Open ~/_Imports.razor file and import the Syncfusion.Blazor and Syncfusion.Blazor.Charts namespace.

@using Syncfusion.Blazor
@using Syncfusion.Blazor.Charts

Now, register the Syncfusion Blazor Service in the ~/Program.cs file of your Blazor Server App or Blazor WebAssembly App.

using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;
using Syncfusion.Blazor;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddServerSideBlazor();
builder.Services.AddSyncfusionBlazor();

var app = builder.Build();
....
using Microsoft.AspNetCore.Components.Web;
using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
using Syncfusion.Blazor;

var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.RootComponents.Add<App>("#app");
builder.RootComponents.Add<HeadOutlet>("head::after");

builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });

builder.Services.AddSyncfusionBlazor();
await builder.Build().RunAsync();
....

Add script resources

The script can be accessed from NuGet through Static Web Assets. Reference the script in the <head> of the main page as follows:

  • For .NET 6 Blazor Server app, include it in ~/Pages/_Layout.cshtml file.

  • For .NET 7 Blazor Server app, include it in the ~/Pages/_Host.cshtml file.

  • For Blazor WebAssembly app, include it in the ~/index.html file.

<head>
    ....
    <script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>
</head>

NOTE

Check out the Adding Script Reference topic to learn different approaches for adding script references in your Blazor application.

Add Blazor Sparkline Component

Add the Syncfusion Blazor Sparkline component in the ~/Pages/Index.razor file.

<SfSparkline>

</SfSparkline>

Populate Blazor Sparkline with Data

To bind data for the Sparkline component, assign a IEnumerable object to the DataSource property. It can also be provided as an instance of the DataManager.

@code {
    public class WeatherReport
    {
        public string Month { get; set; }
        public double Celsius { get; set; }
    };
    public List<WeatherReport> ClimateData = new List<WeatherReport> {
        new  WeatherReport { Month= "Jan", Celsius= 34 },
        new  WeatherReport { Month= "Feb", Celsius= 36 },
        new  WeatherReport { Month= "Mar", Celsius= 32 },
        new  WeatherReport { Month= "Apr", Celsius= 35 },
        new  WeatherReport { Month= "May", Celsius= 40 },
        new  WeatherReport { Month= "Jun", Celsius= 38 },
        new  WeatherReport { Month= "Jul", Celsius= 33 },
        new  WeatherReport { Month= "Aug", Celsius= 37 },
        new  WeatherReport { Month= "Sep", Celsius= 34 },
        new  WeatherReport { Month= "Oct", Celsius= 31 },
        new  WeatherReport { Month= "Nov", Celsius= 30 },
        new  WeatherReport { Month= "Dec", Celsius= 29}
    };
}

Now map the Month and the Celsius fields from the datasource to XName and YName properties for x-axis and y-axis in the Sparkline and then set the ClimateData to DataSource property. Because the Month field is a value-based category, the ValueType property is used to specify it.

<SfSparkline XName="Month"
             YName="Celsius"
             ValueType="SparklineValueType.Category"
             TValue="WeatherReport"
             DataSource="ClimateData"
             Height="80px"
             Width="150px">
</SfSparkline>

Press Ctrl+F5 (Windows) or ⌘+F5 (macOS) to launch the application. This will render the Syncfusion Blazor Sparkline component in your default web browser.

Blazor Sparkline Chart

Blazor Sparkline chart types

Change the Sparkline type using the Type property set to Line, Column, WinLoss, Pie or Area. Here, the Sparkline type is set to Area.

<SfSparkline XName="Month"
             YName="Celsius"
             ValueType="SparklineValueType.Category"
             Type="SparklineType.Area"
             TValue="WeatherReport"
             DataSource="ClimateData"
             Height="80px"
             Width="150px">
</SfSparkline>

Blazor Sparkline Area Chart

NOTE

Refer to code block to know about the property value of ClimateData.

Adding Data Label

Add the Data Labels to improve the readability of the Sparkline component. This can be achieved by setting the Visible property to true in the SparklineDataLabelSettings.

Available types are:

  • Start
  • End
  • All
  • High
  • Low
  • Negative
<SfSparkline DataSource="ClimateData"
              TValue="WeatherReport"
              XName="Month"
              YName="Celsius"
              ValueType="SparklineValueType.Category"
              Height="80px"
              Width="150px">
    <SparklineDataLabelSettings Visible="new List<VisibleType> { VisibleType.Start, VisibleType.End }"></SparklineDataLabelSettings>
    <SparklinePadding Left="10" Right="10"></SparklinePadding>
</SfSparkline>

NOTE

Refer to the code block to know about the property value of ClimateData.

Blazor Sparkline Chart with Data Label

Enable tooltip

When space constraints prevent from displaying information using Data Labels, the tooltip comes in handy. The tooltip can be enabled by setting the Visible property to true in the SparklineTooltipSettings.

<SfSparkline DataSource="ClimateData"
             TValue="WeatherReport"
             XName="Month"
             YName="Celsius"
             ValueType="SparklineValueType.Category"
             Height="80px"
             Width="150px">
    <SparklineDataLabelSettings Visible="new List<VisibleType> { VisibleType.Start, VisibleType.End }"></SparklineDataLabelSettings>
    <SparklinePadding Left="10" Right="10"></SparklinePadding>
    <SparklineTooltipSettings TValue="WeatherReport" Visible="true"></SparklineTooltipSettings>
</SfSparkline>

NOTE

Refer to the code block to know about the property value of the ClimateData.

Blazor Sparkline Chart with Tooltip

NOTE

View Sample in GitHub.

See also

NOTE

You can also explore our Blazor Sparkline Chart example that shows you how to render and configure the sparkline chart.