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Learn how to successfully set user names with `Chinese characters` in ASP.NET Core Identity by adjusting identity options and ensuring password validity.
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How to Use Non-ASCII Characters in Microsoft.AspNetCore.Identity

In the world of web development, particularly when working with user identity systems, it's not uncommon to encounter challenges when it comes to character sets. One such challenge arises when developers want to use non-ASCII characters, such as Chinese words, for usernames in the Microsoft.AspNetCore.Identity framework. This can prompt a frustrating experience, as the platform has certain limitations that may hinder the functionality you desire.

In this post, we'll explore how to effectively overcome these limitations, allowing you to set usernames using Chinese words or other non-ASCII characters without running into validation errors. Let's dive into the details of the solution.

The Issue at Hand

When attempting to set a username to a non-ASCII character in ASP.NET Core Identity, you might run into an error message outlining that your username is invalid. For example, you might see a result like this when trying to create a user with a Chinese username:

[[See Video to Reveal this Text or Code Snippet]]

This happens because, by default, ASP.NET Core Identity enforces strict validation on the allowed username characters. The allowed characters typically include only ASCII characters such as letters, numbers, and some symbols.

Adjusting Identity Options

The good news is that this restriction can be adjusted! Here's how to configure your Identity options to allow for non-ASCII characters:

Step 1: Configure Allowed UserName Characters

You need to modify the AllowedUserNameCharacters setting by configuring it to accept all characters (or at the very least, remove the restriction). Here's how you would do this in your Startup.cs file:

[[See Video to Reveal this Text or Code Snippet]]

Note: Completely allowing all characters may have its implications, especially concerning security. Make sure to assess your application's requirements before implementing this change.

Step 2: Creating the User

After adjusting the identity options, the next step is to create a user with a Chinese username. Here's how your code should look:

[[See Video to Reveal this Text or Code Snippet]]

Password Requirements

When working with ASP.NET Core Identity, you should also be aware of the default password requirements. According to the framework's standard settings, passwords must include:

An uppercase character

A lowercase character

A digit

A non-alphanumeric character

At least six characters in total

In our example, your password "admin123456" does not fulfill the requirements because it lacks an uppercase character and a non-alphanumeric character. To comply with these rules, consider using a password such as "AD@ admin123456".

Important Note

If you have not customized the password validation settings, make sure that the password you choose adheres to these rules. This will prevent further errors when attempting to create a user.

Conclusion

Enabling the use of non-ASCII characters in ASP.NET Core Identity involves adjusting the allowed username settings and ensuring your passwords meet the required criteria. By following the steps outlined above, you can seamlessly integrate usernames in Chinese or any other non-ASCII characters into your application, providing a more inclusive and user-friendly experience.

By addressing this issue thoughtfully, you lay a strong foundation for your application's user management system, accommodating a diverse user base. Happy coding!