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copied!<p>I am using MVC4, I used following approach to redirect a custom html screen upon authorization breach.</p> <p>Extend <code>AuthorizeAttribute</code> say <code>CutomAuthorizer</code> override the <code>OnAuthorization</code> and <code>HandleUnauthorizedRequest</code></p> <p>Register the <code>CustomAuthorizer</code> in the <code>RegisterGlobalFilters</code>.</p> <pre><code>public static void RegisterGlobalFilters(GlobalFilterCollection filters) { filters.Add(new CustomAuthorizer()); } </code></pre> <p>upon identifying the <code>unAuthorized</code> access call <code>HandleUnauthorizedRequest</code>and redirect to the concerned controller action as shown below.</p> <hr> <pre><code>public class CustomAuthorizer : AuthorizeAttribute { public override void OnAuthorization(AuthorizationContext filterContext) { bool isAuthorized = IsAuthorized(filterContext); // check authorization base.OnAuthorization(filterContext); if (!isAuthorized && !filterContext.ActionDescriptor.ActionName.Equals("Unauthorized", StringComparison.InvariantCultureIgnoreCase) && !filterContext.ActionDescriptor.ControllerDescriptor.ControllerName.Equals("LogOn", StringComparison.InvariantCultureIgnoreCase)) { HandleUnauthorizedRequest(filterContext); } } protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext) { filterContext.Result = new RedirectToRouteResult( new RouteValueDictionary{{ "controller", "LogOn" }, { "action", "Unauthorized" } }); } } </code></pre>

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