Getting started with Blazor LinearGauge in Blazor Web App
31 Jan 202511 minutes to read
The Blazor LinearGauge is an ideal component for visualizing numeric values in a linear scale with features like multiple axes, different orientations, and more.
This section briefly explains about how to include Blazor LinearGauge component in your Blazor Web App using Visual Studio.
Prerequisites
Create a new Blazor Web App in Visual Studio
You can create a Blazor Web App using Visual Studio 2022 via Microsoft Templates or the Syncfusion® Blazor Extension.
You need to configure the corresponding Interactive render mode and Interactivity location while creating a Blazor Web Application.
Install Syncfusion® Blazor LinearGauge NuGet in the App
To add Blazor LinearGauge 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.LinearGauge.
If you utilize WebAssembly or Auto
render modes in the Blazor Web App need to be install Syncfusion® Blazor components NuGet packages within the client project.
Alternatively, you can utilize the following package manager command to achieve the same.
Install-Package Syncfusion.Blazor.LinearGauge -Version 28.2.3
NOTE
Syncfusion® Blazor components are available in nuget.org. Refer to NuGet packages topic for available NuGet packages list with component details.
Create a new Blazor Web App in Visual Studio Code
You can create a Blazor Web App using Visual Studio Code via Microsoft Templates or the Syncfusion® Blazor Extension.
You need to configure the corresponding Interactive render mode and Interactivity location while creating a Blazor Web Application.
For example, in a Blazor Web App with the Auto
interactive render mode, use the following commands.
dotnet new blazor -o BlazorWebApp -int Auto
cd BlazorWebApp
cd BlazorWebApp.Client
NOTE
For more information on creating a Blazor Web App with various interactive modes and locations, refer to this link.
Install Syncfusion® Blazor LinearGauge NuGet in the App
If you utilize WebAssembly
or Auto
render modes in the Blazor Web App need to be install Syncfusion® Blazor components NuGet packages within the client project.
- Press Ctrl+` to open the integrated terminal in Visual Studio Code.
- Ensure you’re in the project root directory where your
.csproj
file is located. - Run the following command to install a Syncfusion.Blazor.LinearGauge NuGet package and ensure all dependencies are installed.
dotnet add package Syncfusion.Blazor.LinearGauge -v 28.2.3
dotnet restore
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
Interactive Render Mode | Description |
---|---|
WebAssembly or Auto | Open ~/_Imports.razor file from the client project. |
Server | Open ~/_import.razor file, which is located in the Components folder. |
Import the Syncfusion.Blazor
and Syncfusion.Blazor.LinearGauge
namespace .
@using Syncfusion.Blazor
@using Syncfusion.Blazor.LinearGauge
Now, register the Syncfusion® Blazor Service in the ~/Program.cs file of your Blazor Web App.
If the Interactive Render Mode is set to WebAssembly
or Auto
, you need to register the Syncfusion® Blazor service in both ~/Program.cs files of your Blazor Web App.
...
...
using Syncfusion.Blazor;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddRazorComponents()
.AddInteractiveServerComponents()
.AddInteractiveWebAssemblyComponents();
builder.Services.AddSyncfusionBlazor();
var app = builder.Build();
....
...
using Syncfusion.Blazor;
var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.Services.AddSyncfusionBlazor();
await builder.Build().RunAsync();
If the Interactive Render Mode is set to Server
, your project will contain a single ~/Program.cs file. So, you should register the Syncfusion® Blazor Service only in that ~/Program.cs file.
...
using Syncfusion.Blazor;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddRazorComponents()
.AddInteractiveServerComponents();
builder.Services.AddSyncfusionBlazor();
var app = builder.Build();
....
Add script resources
The script can be accessed from NuGet through Static Web Assets. Include the script reference at the end of the <body>
in the ~/Components/App.razor file as shown below:
<body>
....
<script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>
</body>
NOTE
Check out the Adding Script Reference topic to learn different approaches for adding script references in your Blazor application.
Add Syncfusion® Blazor LinearGauge component
Add the Syncfusion® Blazor LinearGauge component in the ~Pages/.razor file. If an interactivity location as Per page/component
in the web app, define a render mode at the top of the ~Pages/.razor
component, as follows:
Interactivity location | RenderMode | Code |
---|---|---|
Per page/component | Auto | @rendermode InteractiveAuto |
WebAssembly | @rendermode InteractiveWebAssembly | |
Server | @rendermode InteractiveServer | |
None | — |
NOTE
If an Interactivity Location is set to
Global
and the Render Mode is set toAuto
orWebAssembly
orServer
, the render mode is configured in theApp.razor
file by default.
@* desired render mode define here *@
@rendermode InteractiveAuto
<SfLinearGauge>
<LinearGaugeAxes>
<LinearGaugeAxis>
<LinearGaugePointers>
<LinearGaugePointer></LinearGaugePointer>
</LinearGaugePointers>
</LinearGaugeAxis>
</LinearGaugeAxes>
</SfLinearGauge>
- Press Ctrl+F5 (Windows) or ⌘+F5 (macOS) to launch the application. This will render the Syncfusion® Blazor LinearGauge component in your default web browser.

NOTE
Set pointer value
Pointers are used to indicate values on an axis. You can change the pointer value using the PointerValue property in the LinearGaugePointer.
NOTE
In LinearGauge, you can configure multiple axes. On each axis, you can add a pointer.
<SfLinearGauge>
<LinearGaugeAxes>
<LinearGaugeAxis>
<LinearGaugePointers>
<LinearGaugePointer PointerValue="40">
</LinearGaugePointer>
</LinearGaugePointers>
</LinearGaugeAxis>
</LinearGaugeAxes>
</SfLinearGauge>

Add a title for Blazor LinearGauge
The title can be added to the linear gauge to provide a piece of quick information to the users about the context of the rendered linear gauge. You can add the title to the linear gauge using Title property in SfLinearGauge.
<SfLinearGauge Title="Linear Gauge">
<LinearGaugeAxes>
<LinearGaugeAxis>
<LinearGaugePointers>
<LinearGaugePointer></LinearGaugePointer>
</LinearGaugePointers>
</LinearGaugeAxis>
</LinearGaugeAxes>
</SfLinearGauge>

Add ranges in the Blazor LinearGauge
The range is used to specify a group of scale values in the gauge. You can set the range start and end using Start and End properties in the LinearGaugeRange. You can add any number of ranges for an axis using LinearGaugeRange.
<SfLinearGauge>
<LinearGaugeAxes>
<LinearGaugeAxis Minimum="0" Maximum="200">
<LinearGaugeAxisLabelStyle Format="{value}°C"></LinearGaugeAxisLabelStyle>
<LinearGaugePointers>
<LinearGaugePointer PointerValue="140">
</LinearGaugePointer>
</LinearGaugePointers>
<LinearGaugeRanges>
<LinearGaugeRange Start="0" End="80" Color="#ff5985"></LinearGaugeRange>
<LinearGaugeRange Start="80" End="120" Color="#ffb133"></LinearGaugeRange>
<LinearGaugeRange Start="120" End="140" Color="#fcde0b"></LinearGaugeRange>
<LinearGaugeRange Start="140" End="200" Color="#27d5ff"></LinearGaugeRange>
</LinearGaugeRanges>
</LinearGaugeAxis>
</LinearGaugeAxes>
</SfLinearGauge>
