LocalStorage with Blazor

how to read and write to local Storage using Blazor

first we create a LocalStorageService.cs file

using Microsoft.JSInterop;
using System.Threading.Tasks;

namespace BlazorLocalStorage.Service
    public class LocalStorageService
        private readonly IJSRuntime _js;

        public LocalStorageService(IJSRuntime js)
            _js = js;

        public async Task<string> GetFromLocalStorage(string key)
            return await _js.InvokeAsync<string>("localStorage.getItem", key);

        public async Task SetLocalStorage(string key, string value)
            await _js.InvokeVoidAsync("localStorage.setItem", key, value);

inject the service in Startup.cs

public void ConfigureServices(IServiceCollection services)

Create a new razor component for testing i called it LocalStorage.razor

@page "/localstorage"

@using BlazorLocalStorage.Service
@inject LocalStorageService Storage

<h1>Testing Local Storage!</h1>

<input type="text" @bind-value="Value" @bind-value:event="oninput" />

<p>Current Value: @Value</p>

<button @onclick="SetValue">Save</button>
<button @onclick="GetValue">Read</button>

    const string key = "blazorKey";

    public string Value { get; set; }

    async Task SetValue()
        await Storage.SetLocalStorage(key, Value);

    async Task GetValue()
       Value = await Storage.GetFromLocalStorage(key);


load the app and navigate to /localstorage

type Hello World! and hit save

refresh the page a click read to get the message from local storage.

Hello Blazor World!

Welcome to my first blog post. This is blog will be dedicated to anything blazor, including tutorial, tips, tricks, etc…

What is Blazor?

According to Microsoft Docs; Blazor is a framework for building interactive client-side web UI with .NET:

Blazor is a framework for building interactive client-side web UI with .NET:

  • Create rich interactive UIs using C# instead of JavaScript.
  • Share server-side and client-side app logic written in .NET.
  • Render the UI as HTML and CSS for wide browser support, including mobile browsers.

Using .NET for client-side web development offers the following advantages:

  • Write code in C# instead of JavaScript.
  • Leverage the existing .NET ecosystem of .NET libraries.
  • Share app logic across server and client.
  • Benefit from .NET’s performance, reliability, and security.
  • Stay productive with Visual Studio on Windows, Linux, and macOS.
  • Build on a common set of languages, frameworks, and tools that are stable, feature-rich, and easy to use.