I really get stuck on the approach to do dependency injection into action filter of web api. I have an action filter like this:
public class AuthorizationAttribute : ActionFilterAttribute
{
public IApiKeyRepository Repository { get; set; }
private Guid GetApiKey(string customerKey)
{
return Repository.GetApiKey(customerKey);
}
public override void OnActionExecuting(HttpActionContext actionContext)
{
}
}
I would like to do property injection on the property Repository by using Windsor (but it does not matter which IoC container is used)
I did come up to customize FilterProvider but it did not work out for me, does anyone have solution or running code on this? it will be much appreciated
Web API includes filters to add extra logic before or after action method executes. Filters can be used to provide cross-cutting features such as logging, exception handling, performance measurement, authentication and authorization.
Action filters contain logic that is executed before and after a controller action executes. You can use an action filter, for instance, to modify the view data that a controller action returns. Result filters contain logic that is executed before and after a view result is executed.
You can take advantage of the ServiceFilter attribute to inject dependencies in your controller or your controller's action methods.
You can create custom filter attributes by implementing an appropriate filter interface for which you want to create a custom filter and derive the FilterAttribute class to use that class as an attribute. For example, implement IExceptionFilter and the FilterAttribute class to create a custom exception filter.
You need to check your specific IOC implementation. IOC Containers such as NInject and Autofac have some type of filter injection by injecting public properties. Windsor I am unsure about, but here is a link that creates a wrapper which might help with Windsor: http://eagle081183.wordpress.com/2010/09/21/dependency-injection-with-asp-net-mvc-action-filters/ and another article directly addressing the issue with Windsor: http://weblogs.asp.net/psteele/archive/2009/11/04/using-windsor-to-inject-dependencies-into-asp-net-mvc-actionfilters.aspx.
For completeness with NInject and Autofac:
NInject:
Autofac:
**EDIT - additional option **
You should be able to do GlobalConfiguration.Configuration.DependencyResolver.GetService(...)
from any filter regardless of the IOC container you are using.
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