stevejay

var path = HttpContext.Current.Request.Path;

HttpContext.Current.RewritePath("~/Error/ManualErrors");
HttpContext.Current.Session["statusCode"] = statusCode;

IHttpHandler handler = new MvcHttpHandler();
handler.ProcessRequest(HttpContext.Current);

HttpContext.Current.RewritePath(path);
HttpContext.Current.Server.ClearError();

stevejay

HttpContext.Current.Session["exception"] = exception;

var url = "~/Error/ManualErrors?statusCode=" + statusCode;
HttpContext.Current.Server.TransferRequest(url, false, "GET", null);

stevejay

var routeData = new RouteData();
routeData.Values.Add("controller", ErrorControllerRouteName);
routeData.Values.Add("action", actionName);

var requestContext = new RequestContext(
    new HttpContextWrapper(HttpContext.Current),
    routeData);
    
var controllerFactory = ControllerBuilder.Current.GetControllerFactory();

stevejay

var viewResult = new ViewResult {ViewName = "ManualErrors"};
// Setting of values on its ViewBag here.
viewResult.ExecuteResult(controllerContext);
HttpContext.Current.Server.ClearError();

stevejay

var routeData = new RouteData();
routeData.Values.Add("controller", ErrorControllerRouteName);

var controllerContext = new ControllerContext(
    new HttpContextWrapper(HttpContext.Current),
    routeData,
    new FakeController());

stevejay

HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.StatusCode = statusCode;

stevejay

HttpContext.Current.Server.ClearError();

stevejay

var httpException = exception as HttpException;
...
var statusCode = httpException.GetHttpCode();

stevejay

var exception = HttpContext.Current.Server.GetLastError();

stevejay

<system.web>
    <!-- Additional configuration elided. -->
    <httpModules>
        <add
            name="ErrorHandlerHttpModule"
            type="MvcErrorHandling.MvcHelpers.ErrorHandlerHttpModule, MvcErrorHandling" />
    </httpModules>
</system.web>

<system.webServer>