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ASP.NET’s built in CSRF (Cross-site request forgery) is pretty straight forward. You add a token to your views via an HTML Helper, and then decorate your controller actions with a specific attribute to validate the token on POST. There are many times, seemingly randomly, where users have invalid tokens on their requests. MVC throws a 500 error with an HttpAntiForgeryException. For legitimate users, this is not an optimal experience.

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With a new project we have, I was tasked with working on security. Initially, I used OWIN and cookie authentication to implement a simple login and all was good. However, we wanted to remove the ability to login and have it driven by an external site redirecting a user with a token.

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In my .NET 4.5 MVC projects, I already have helper methods/extensions that let me determine if a user has access to a particular controller action. This provides a nice mechanism to hide and show buttons, hyperlinks, or other UI action elements based on the authorization attributes that have been defined on the MVC Controller.

However, this is a bit more complicated with ApiControllers.

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I’ve used T4MVC within my MVC projects for a long, long time now. It’s one of those extremely useful utilities that probably gets forgotten.

At any rate, I’m not sure if I ever mentioned why I like T4MVC, but here are a few reasons.

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