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How do I save and load data within a component in Blazor?

Platform: Blazor| Category : General, Components

By using browser storage in Blazor, we can save and load data within a component. The following example demonstrates that the counter value is updated with a button click and the count value stored in local storage. When you refresh the page, the saved data will load from the browser local storage.


@page "/"
@using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage
@inject ProtectedLocalStorage LocalStorage

@if (isCount)
    <p>Current count: <strong>@currentCount</strong></p>
    <button class="btn btn-primary" @onclick="IncrementCount">Increment</button>

@code {
    private int currentCount;
    private bool isCount;

    protected override async Task OnAfterRenderAsync(bool firstRender)
        if (firstRender)
            isCount = true;
            // Get the count value into browser local storage.
            var countValue = await LocalStorage.GetAsync<int>("countValue");
            // Loaded the browser local storage value to currentCount.
            currentCount = countValue.Success ? countValue.Value : 0;

    private async Task IncrementCount()
        // Set the count value in browser local storage.
        await LocalStorage.SetAsync("countValue", currentCount);

Refer to this link for more details.

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