I am trying to add custon 404 pages as per answer of this question
ASP.NET MVC 404 handling and IIS7 <httpErrors>
by adding
<httpErrors existingResponse="PassThrough" />
under <system.webServer>
tag in my Web.Config file.
But I am getting following error
Module: CustomErrorModule
Notification: SendResponse
Handler: System.Web.Mvc.MvcHandler
Error Code: 0x80070021
Config Error: This configuration section cannot be used at this path.
This happens when the section is locked at a parent level.
Locking is either by default (overrideModeDefault="Deny"),
or set explicitly by a location tag with overrideMode="Deny"
or the legacy allowOverride="false".
Config Source
153: <httpErrors existingResponse="PassThrough" />
154: </system.webServer>
I also tried to override the locking based on http://learn.iis.net/page.aspx/145/how-to-use-locking-in-iis-70-configuration ( Task 2 )
by adding location tag in the Web.config
as following
<configuration>
....
....
<location allowOverride="true">
<system.webServer>
<httpErrors existingResponse="PassThrough" />
</system.webServer>
</location>
</configuration>
but I am getting the same error.
How should I configure httpErrors element in Web.config so it works
I am using IIS 7 , VS 2010 , ASP.NET MVC3
Update:
I am able to get rid of the locked error
if i modify applicationHost.config file and change
this
<section name="httpErrors" overrideModeDefault="Deny" />
to
<section name="httpErrors" overrideModeDefault="Allow" />
but ideally I do not want to change applicationHost.config file and want to override it from the Web.config file
If you are interested you can create custom errors handling from your Global.asax.cs:
protected void Application_Error()
{
var exc = Server.GetLastError();
var httpExc = exc as HttpException;
Response.Clear();
Server.ClearError();
var routeData = new RouteData();
routeData.Values["controller"] = "Error";
routeData.Values["action"] = "General";
routeData.Values["exception"] = exc;
Response.StatusCode = 500;
if (httpExc != null)
{
Response.StatusCode = httpExc.GetHttpCode();
routeData.Values["action"] = "Http404";
routeData.Values["exception"] = httpExc;
}
Response.TrySkipIisCustomErrors = true;
IController errorsController = new WWS_Website.Controllers.ErrorController();
var rc = new RequestContext(new HttpContextWrapper(Context), routeData);
errorsController.Execute(rc);
}
Controller:
public ActionResult General(Exception exception)
{
return View(exception);
}
public ActionResult Http404(Exception exception)
{
return View(exception);
}
You can have different views for each error. You can also send email from this controller method to you webmaster email account - very handy.
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