Asp net identity login with custom facebook google buttons

Introduction

ASP.NET is a popular programming language used for building web applications. One common in web development is to implement login functionality with social media platforms such as Facebook and Google. In this article, we will explore how to integrate custom Facebook and Google login buttons into an ASP.NET Identity login system.

Prerequisites

Before we begin, make sure you have the :

  • Visual Studio installed on your machine
  • An ASP.NET project set up with ASP.NET Identity
  • Facebook and Google accounts with registered applications

Step 1: Adding Facebook and Google Login Buttons

To add custom Facebook and Google login buttons to your ASP.NET Identity login page, you need to modify the login view. Open the login view file (typically “Login.cshtml”) and add the following code:

This code adds two buttons, one for Facebook login and another for Google login. The URLs in the “href” attribute point to the external login action in the Account controller, passing the respective provider (“Facebook” or “Google”) as a parameter.

Step 2: Facebook and Google Authentication

Next, we need to configure the authentication settings for Facebook and Google in our ASP.NET project. Open the “Startup.cs” file and locate the “ConfigureServices” . Add the following code inside the method:


services.()
    .AddFacebook(options =>
    {
        options.AppId = "YOUR_FACEBOOK_APP_ID";
        options.AppSecret = "YOUR_FACEBOOK_APP_SECRET";
    })
    .AddGoogle(options =>
    {
        options.ClientId = "YOUR_GOOGLE_CLIENT_ID";
        options.ClientSecret = "YOUR_GOOGLE_CLIENT_SECRET";
    });

Replace “YOUR_FACEBOOK_APP_ID”, “YOUR_FACEBOOK_APP_SECRET”, “YOUR_GOOGLE_CLIENT_ID”, and “YOUR_GOOGLE_CLIENT_SECRET” with the respective from your Facebook and Google developer accounts.

Step 3: Handling External Login

When a user clicks on the Facebook or Google login button, they will be redirected to the respective platform for authentication. After successful authentication, the platform will redirect the user back to our application. We need to handle these callbacks to complete the login process.

In the “AccountController.cs” file, add the following code:


[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public IActionResult ExternalLogin(string provider, string returnUrl = null)
{
    // Request a redirect to the external login provider
    var redirectUrl = Url.Action("ExternalLoginCallback", "Account", new { ReturnUrl = returnUrl });
    var properties = _signInManager.ConfigureExternalAuthenticationProperties(provider, redirectUrl);
    return (properties, provider);
}

[HttpGet]
[AllowAnonymous]
public async Task ExternalLoginCallback(string returnUrl = null, string remoteError = null)
{
    // Handle the external login callback
    // ...
}

The “ExternalLogin” action initiates the external login process by redirecting the user to the respective platform. The “ExternalLoginCallback” action handles the callback from the platform and completes the login process.

Conclusion

In this article, we have learned how to integrate custom Facebook and Google login buttons into an ASP.NET Identity login system. By following the steps outlined above, you can enhance the user experience of your web application by providing convenient social media login options.

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