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POApplication Error not fired for 404 page when extra custom segment
 

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    <p>I have a asp.net mvc 3 application with IIS7 and IIS express on local, which is using Application_Error for logging the exceptions and redirecting to a custom error page. My application has different regions, and the application_error is called whenever the controller or the action is not matched, but not for the region.</p> <p>Here is an example of the routes used:</p> <pre><code>routes.MapRoute( "Default", "{region}/{controller}/{action}/{id}", new { region = "uk", controller = "Home", action = "Index", id = UrlParameter.Optional }, // Parameter defaults new { region = new RegionWhitelistConstraint() } // constraint for valid regions ); </code></pre> <p>In this case the Application_Error would be fired for /uk/NotFoundPage but not for /foo/Home</p> <p>Here the constraint for the region:</p> <pre><code>public class RegionWhitelistConstraint : IRouteConstraint { public bool Match(System.Web.HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection) { var whiteList = Region.DefaultWhiteList; var currentRegionValue = values[parameterName].ToString(); return whiteList.Contains(currentRegionValue); } } </code></pre> <p>I have seen <a href="https://stackoverflow.com/questions/6990677/application-error-not-fired-for-404-in-mvc-3-when-url-contains-4-or-more-path-se">this</a> question, that propose adding a catch all route, but apart from that I would like to know if there is a way of firing Application_Error as it is done for the controllers or actions.</p>
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