How do I display custom error pages in Asp.Net Mvc 3?
asp.net-mvc-3, custom-error-pages, error-handling, http-error, iis-express
Solution
I use these steps:
// in Global.asax.cs:
protected void Application_Error(object sender, EventArgs e) {
var ex = Server.GetLastError().GetBaseException();
Server.ClearError();
var routeData = new RouteData();
routeData.Values.Add("controller", "Error");
routeData.Values.Add("action", "Index");
if (ex.GetType() == typeof(HttpException)) {
var httpException = (HttpException)ex;
var code = httpException.GetHttpCode();
routeData.Values.Add("status", code);
} else {
routeData.Values.Add("status", 500);
}
routeData.Values.Add("error", ex);
IController errorController = new Kavand.Web.Controllers.ErrorController();
errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
}
protected void Application_EndRequest(object sender, EventArgs e) {
if (Context.Response.StatusCode == 401) { // this is important, because the 401 is not an error by default!!!
throw new HttpException(401, "You are not authorised");
}
}
AND:
// in Error Controller:
public class ErrorController : Controller {
public ActionResult Index(int status, Exception error) {
Response.StatusCode = status;
return View(status);
}
protected override void Dispose(bool disposing) {
base.Dispose(disposing);
}
}
AND the index view in Error folder:
@* in ~/Views/Error/Index.cshtml: *@
@model Int32
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<title>Kavand | Error</title>
</head>
<body>
<div>
There was an error with your request. The error is:<br />
<p style=" color: Red;">
@switch (Model) {
case 401: {
<span>Your message goes here...</span>
}
break;
case 403: {
<span>Your message goes here...</span>
}
break;
case 404: {
<span>Your message goes here...</span>
}
break;
case 500: {
<span>Your message goes here...</span>
}
break;
//and more cases for more error-codes...
default: {
<span>Unknown error!!!</span>
}
break;
}
</p>
</div>
</body>
</html>
AND -the final step:
<!-- in web.config: -->
<customErrors mode="Off"/>
Problem
I want all 401 errors to be be redirected to a custom error page. I have initially setup the following entry in my web.config. ``` <customErrors defaultRedirect="ErrorPage.aspx" mode="On"> <error statusCode="401" redirect="~/Views/Shared/AccessDenied.aspx" /> </customErrors> ``` When using IIS Express I receive the stock IIS Express 401 error page. In the event when I do not use IIS Express a blank page is returned. Using Google Chrome's Network tab to inspect the response, I see that while the page is blank a 401 status is returned in the headers What I have tried thus far is using suggestions from this SO answer since I am using IIS Express but to no avail. I have tried using a combination `<custom errors>` and `<httpErrors>` with no luck - the standard error or blank page is still displayed. The `httpErrors` section looks like this at the moment based on the link from the above SO question ( I also found another very promising answer however no luck - blank response) ``` <system.webServer> <httpErrors errorMode="DetailedLocalOnly" existingResponse="PassThrough" > <remove statusCode="401" /> <error statusCode="401" path="/Views/Shared/AccessDenied.htm" /> </httpErrors> <!-- <httpErrors errorMode="Custom" existingResponse="PassThrough" defaultResponseMode="ExecuteURL"> <remove statusCode="401" /> <error statusCode="401" path="~/Views/Shared/AccessDenied.htm" responseMode="File" /> </httpErrors> --> </system.webServer> ``` I have even modified the `applicationhost.config` file and modified `<httpErrors lockAttributes="allowAbsolutePathsWhenDelegated,defaultPath">` to `<httpErrors lockAttributes="allowAbsolutePathsWhenDelegated">` based on information from iis.net. During the course of my endeavours I also managed to stumbled upon this error as described in another SO question. How do I display custom error pages in Asp.Net Mvc 3? Additional info The following controller actions have been decorated with the `Authorize` attribute for a specific user. ``` [HttpGet] [Authorize(Users = "domain\\userXYZ")] public ActionResult Edit() { return GetSettings(); } [HttpPost] [Authorize(Users = "domain\\userXYZ")] public ActionResult Edit(ConfigurationModel model, IList<Shift> shifts) { var temp = model; model.ConfiguredShifts = shifts; EsgConsole config = new EsgConsole(); config.UpdateConfiguration(model.ToDictionary()); return RedirectToAction("Index"); } ```