No Logout Page Scaffolded with New .NET 8 Blazor Web App Authentication: A Step-by-Step Guide

Are you tired of manually creating a logout page for your .NET 8 Blazor web app? Well, you’re in luck! With the latest release of .NET 8, Microsoft has introduced a new authentication template that includes a pre-built logout page. In this article, we’ll dive into the world of Blazor web app authentication and explore how to take advantage of this exciting new feature.

What’s New in .NET 8 Blazor Web App Authentication?

In .NET 8, Microsoft has revamped the authentication template for Blazor web apps. One of the most significant changes is the inclusion of a pre-built logout page, which eliminates the need for developers to create their own custom logout page from scratch. This new feature is a game-changer for developers, as it saves time and reduces the complexity of implementing authentication in Blazor web apps.

Benefits of Using the New Authentication Template

The new authentication template in .NET 8 offers several benefits, including:

• Faster development: With a pre-built logout page, developers can focus on building the core features of their web app, rather than spending hours implementing authentication.
• Improved security: The new authentication template includes robust security features, such as password hashing and salting, to protect user data.
• Easier maintenance: The pre-built logout page is easily customizable, making it simple to update and maintain over time.

Step-by-Step Guide to Using the New Authentication Template

Now that we’ve covered the benefits of the new authentication template, let’s dive into the step-by-step guide on how to use it in your .NET 8 Blazor web app.

Step 1: Create a New Blazor Web App

Open Visual Studio and create a new Blazor web app project. Select the “Blazor App” template and choose “.NET 8” as the target framework.

dotnet new blazorapp -n MyBlazorApp -f net8.0

Step 2: Enable Authentication

In the project template, navigate to the “Program.cs” file and add the following code to enable authentication:

using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authorization;

builder.Services.AddAuthentication(options =>
{
    options.DefaultScheme = "Cookies";
})
.AddCookie(options =>
{
    options.LoginPath = "/Login";
    options.LogoutPath = "/Logout";
});

Step 3: Add the Logout Page

Since the logout page is scaffolded by default, all you need to do is navigate to the “Pages” folder and find the “Logout.razor” file. This page is pre-built with the necessary logic to handle logout requests.

@page "/Logout"
@attribute [Authorize]

<h2>Logout</h2>

<p>You have been logged out.</p>

Step 4: Add a Login Page (Optional)

If you want to add a custom login page, create a new Razor component called “Login.razor” and add the following code:

@page "/Login"
@attribute [AllowAnonymous]

<h2>Login</h2>

<form>
    <label>Username:</label>
    <input type="text" @bind="Username" />
    <br>
    <label>Password:</label>
    <input type="password" @bind="Password" />
    <br>
    <button type="submit">Login</button>
</form>

Step 5: Test the Logout Page

Run the application and navigate to the logout page by clicking on the logout button. You should be redirected to the logout page, where you’ll see a confirmation message indicating that you’ve been logged out.

Customizing the Logout Page

While the pre-built logout page is functional, you may want to customize it to fit your application’s branding and style. Fortunately, this is easy to do!

Adding a Custom Logout Message

To add a custom logout message, simply update the “Logout.razor” file with the following code:

@page "/Logout"
@attribute [Authorize]

<h2>Logout</h2>

<p>You have been logged out. Thank you for using our application!</p>

Adding a Redirect to the Homepage

If you want to redirect the user to the homepage after logging out, add the following code to the “Logout.razor” file:

@page "/Logout"
@attribute [Authorize]

<h2>Logout</h2>

<p>You have been logged out. You will be redirected to the homepage in 3 seconds.</p>

@code {
    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            await Task.Delay(3000);
            Navigation.NavigateTo("/", true);
        }
    }
}

Conclusion

In this article, we’ve explored the new authentication template in .NET 8 Blazor web apps, including the pre-built logout page. By following the step-by-step guide, you can easily implement authentication in your Blazor web app and take advantage of the benefits offered by the new template. Remember to customize the logout page to fit your application’s branding and style, and don’t hesitate to reach out if you have any questions or need further assistance.

Feature	Description
Pre-built logout page	A pre-built logout page is included in the new authentication template, eliminating the need for developers to create their own custom logout page.
Improved security	The new authentication template includes robust security features, such as password hashing and salting, to protect user data.
Easier maintenance	The pre-built logout page is easily customizable, making it simple to update and maintain over time.

By leveraging the new authentication template in .NET 8 Blazor web apps, you can build faster, more secure, and more maintainable applications with ease.

Happy coding!

Frequently Asked Question

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