Скачать или смотреть How to Fetch the User Name in ASP.NET Core 2.0 Web Applications

Discover how to effectively retrieve a user's name when deploying an ASP.NET Core 2.0 web application on IIS, including essential authentication settings and code snippets.
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How to Fetch the User Name in ASP.NET Core 2.0 Web Applications

In this guide, we'll tackle a common issue many developers face when working with ASP.NET Core 2.0 web applications hosted on IIS. Specifically, we're looking at how to effectively fetch the user name of the user browsing your application when utilizing Windows Authentication. Let's dive into the problem and see how to solve it.

The Problem: Retrieving the User Name

Consider you are developing a web application that requires user identification. For this purpose, you want to fetch the username of the logged-in user. However, when you deploy your application to IIS, the code seems to return the application pool identity instead of the actual username. This can be frustrating, especially when you require user-specific actions or data processing.

In your HomeController, you might find code that looks like this:

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

This works locally but fails in a deployed environment. So how do you get the actual username?

The Solution: Configuring IIS and Using HttpContext.User

Step 1: Configure IIS Settings

To ensure that your application retrieves the correct username from clients, you'll need to adjust your IIS settings. This is particularly relevant when using Windows Authentication. Here are the steps:

Locate your launchsettings.json file.

In the iisSettings section, modify the settings as follows:

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

Make sure to save the changes. This configuration ensures that only authenticated users can access your application, thus allowing the correct user name to be retrieved.

Step 2: Fetch the Username Using HttpContext

Once you've properly configured IIS, you can make changes to your controller code. Instead of relying on WindowsIdentity, you can use the HttpContext object to fetch the username directly. Update your code as follows:

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

This code snippet retrieves the username from the HttpContext when the application is running, giving you the required information.

Additional Notes

Ensure that you have properly configured your application pool in IIS and that it is set to use the correct identity.

Always test your application after making changes to authentication settings to verify that you can indeed access the user's information properly.

Remember to handle cases where the username might not be retrieved or the user may not be authenticated.

Conclusion

In conclusion, fetching the username of the user browsing an ASP.NET Core 2.0 web application deployed on IIS requires a proper configuration of your authentication settings along with the right code adjustments. By ensuring Windows Authentication is enabled and using the HttpContext to retrieve user information, you can successfully acquire user-specific data in your application.

Happy coding! If you have any questions or face issues, feel free to leave a comment below.