Getting Started with Blazor Chart Component in Blazor Server App

29 Jan 20248 minutes to read

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

Prerequisites

System requirements for Blazor components

Create a new Blazor App in Visual Studio

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

Install Syncfusion Blazor Charts NuGet in the App

To add Blazor Chart 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.Charts. Alternatively, you can utilize the following package manager command to achieve the same.

Package Manager
Install-Package Syncfusion.Blazor.Charts -Version 27.2.2

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 namespace.

~/_Imports.razor

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

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

Blazor Server 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();
....

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.

<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 Chart Component

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

RAZOR

<SfChart>

</SfChart>

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

Populate Blazor chart with data

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

RAZOR

public class SalesInfo
{
    public string Month { get; set; }
    public double SalesValue { get; set; }
}

public List<SalesInfo> Sales = new List<SalesInfo>
{
    new SalesInfo { Month = "Jan", SalesValue = 35 },
    new SalesInfo { Month = "Feb", SalesValue = 28 },
    new SalesInfo { Month = "Mar", SalesValue = 34 },
    new SalesInfo { Month = "Apr", SalesValue = 32 },
    new SalesInfo { Month = "May", SalesValue = 40 },
    new SalesInfo { Month = "Jun", SalesValue = 32 },
    new SalesInfo { Month = "Jul", SalesValue = 35 }
};

Now, map the data fields Month and Sales to the series XName and YName properties, then set the data to the DataSource property, and the chart type to Column because we will be viewing the data in a column chart.

RAZOR
<SfChart>
    <ChartPrimaryXAxis ValueType="Syncfusion.Blazor.Charts.ValueType.Category"></ChartPrimaryXAxis>
    <ChartSeriesCollection>
        <ChartSeries DataSource="@Sales" XName="Month" YName="SalesValue" Type="ChartSeriesType.Column">
        </ChartSeries>
    </ChartSeriesCollection>
</SfChart>

@code {
    public class SalesInfo
    {
        public string Month { get; set;}
        public double SalesValue { get; set;}
    }

    public List<SalesInfo> Sales = new List<SalesInfo>
    {
        new SalesInfo { Month = "Jan", SalesValue = 35 },
        new SalesInfo { Month = "Feb", SalesValue = 28 },
        new SalesInfo { Month = "Mar", SalesValue = 34 },
        new SalesInfo { Month = "Apr", SalesValue = 32 },
        new SalesInfo { Month = "May", SalesValue = 40 },
        new SalesInfo { Month = "Jun", SalesValue = 32 },
        new SalesInfo { Month = "Jul", SalesValue = 35 }
    };
}

Add titles

Using the Title property, you can add a title to the chart and the axes to provide the user with quick information about the data plotted in the chart.

RAZOR
<SfChart Title="Sales Analysis">
    <ChartPrimaryXAxis Title="Month" ValueType="Syncfusion.Blazor.Charts.ValueType.Category"></ChartPrimaryXAxis>
    <ChartPrimaryYAxis Title="Sales in Dollar"></ChartPrimaryYAxis>
    <ChartSeriesCollection>
        <ChartSeries DataSource="@Sales" XName="Month" YName="SalesValue" Type="ChartSeriesType.Column">
        </ChartSeries>
    </ChartSeriesCollection>
</SfChart>

Add data label

You can add data labels to improve the readability of the chart. This can be achieved by setting the Visible property to true in the ChartDataLabel.

RAZOR
<SfChart Title="Sales Analysis">
    <ChartPrimaryXAxis Title="Month" ValueType="Syncfusion.Blazor.Charts.ValueType.Category"></ChartPrimaryXAxis>
    <ChartPrimaryYAxis Title="Sales in Dollar"></ChartPrimaryYAxis>
    <ChartSeriesCollection>
        <ChartSeries DataSource="@Sales" XName="Month" YName="SalesValue" Type="ChartSeriesType.Column">
            <ChartMarker>
                <ChartDataLabel Visible="true"></ChartDataLabel>
            </ChartMarker>
        </ChartSeries>
    </ChartSeriesCollection>
</SfChart>

When space constraints prevent you from displaying information using data labels, the tooltip comes in handy. The tooltip can be enabled by setting the Enable property in ChartTooltipSettings to true.

RAZOR
<SfChart Title="Sales Analysis">
    <ChartPrimaryXAxis Title="Month" ValueType="Syncfusion.Blazor.Charts.ValueType.Category"></ChartPrimaryXAxis>
    <ChartPrimaryYAxis Title="Sales in Dollar"></ChartPrimaryYAxis>
    <ChartTooltipSettings Enable="true"></ChartTooltipSettings>
    <ChartSeriesCollection>
        <ChartSeries DataSource="@Sales" XName="Month" YName="SalesValue" Type="ChartSeriesType.Column">
        </ChartSeries>
    </ChartSeriesCollection>
</SfChart>

Enable legend

You can use legend for the chart by setting the Visible property to true in ChartLegendSettings. The legend name can be changed by using the Name property in the series.

RAZOR
<SfChart Title="Sales Analysis">
    <ChartPrimaryXAxis Title="Month" ValueType="Syncfusion.Blazor.Charts.ValueType.Category"></ChartPrimaryXAxis>
    <ChartPrimaryYAxis Title="Sales in Dollar"></ChartPrimaryYAxis>
    <ChartLegendSettings Visible="true"></ChartLegendSettings>
    <ChartSeriesCollection>
        <ChartSeries DataSource="@Sales" Name="Sales" XName="Month" YName="SalesValue" Type="ChartSeriesType.Column">
        </ChartSeries>
    </ChartSeriesCollection>
</SfChart>

NOTE

View Sample in GitHub.