Asp net identity case insensitive email and usernames

ASP.NET is a popular programming language used for developing web applications. One common requirement in web applications is to have case-insensitive email and usernames for user authentication. In this article, we will explore how to achieve this using ASP.NET Identity.

ASP.NET Identity is a membership system that allows developers to add authentication and authorization to their applications. It provides a set of APIs and features that make it easy to manage user accounts, roles, and claims.

To make email and usernames case-insensitive in ASP.NET Identity, we need to customize the user manager and user store classes. These classes are responsible for managing user accounts and storing user information.

Customizing the User Manager

The first step is to create a custom user manager class that inherits from the default user manager provided by ASP.NET Identity. We can override the necessary methods to make email and usernames case-insensitive.

Here's an example of how to customize the user manager class:

public class CustomUserManager : UserManager
{
    public CustomUserManager(IUserStore store)
        : base(store)
    {
    }

    public override Task FindByEmailAsync(string email)
    {
        return Users.FirstOrDefaultAsync(u => u.Email.ToLower() == email.ToLower());
    }

    public override Task FindByNameAsync(string userName)
    {
        return Users.FirstOrDefaultAsync(u => u.UserName.ToLower() == userName.ToLower());
    }
}

In the above code, we override the FindByEmailAsync and FindByNameAsync methods and use the ToLower() method to convert the email and username to lowercase before comparing them with the stored values.

Customizing the User Store

The next step is to create a custom user store class that implements the IUserStore interface. This class is responsible for storing and retrieving user information from the database.

Here's an example of how to customize the user store class:

public class CustomUserStore : IUserStore
{
    // Implement the necessary methods here
}

In the above code, we need to implement the necessary methods to interact with the database. This includes methods like FindByEmailAsync and FindByNameAsync, which we can implement similar to the user manager class.

Configuring ASP.NET Identity

Once we have created the custom user manager and user store classes, we need to configure ASP.NET Identity to use them. This can be done in the Startup.cs file of our ASP.NET application.

Here's an example of how to configure ASP.NET Identity:

public void ConfigureServices(IServiceCollection services)
{
    // Add ASP.NET Identity services
    services.AddIdentity()
        .AddUserManager()
        .AddUserStore()
        .AddDefaultTokenProviders();

    // Other configuration code
}

In the above code, we use the AddIdentity method to configure ASP.NET Identity. We specify our custom user manager and user store classes using the AddUserManager and AddUserStore methods, respectively.

Conclusion

By customizing the user manager and user store classes in ASP.NET Identity, we can make email and usernames case-insensitive. This allows users to log in with different case variations of their email and username.

ASP.NET Identity provides a flexible and extensible framework for managing user authentication and authorization in web applications. With a few customizations, we can tailor it to meet our specific requirements, such as case-insensitive email and usernames.