Diagnosing 404 errors on IIS 7 and ASP.NET MVC

Question

I have an mvc app developed and tested with Cassini. Deployed to my site on GoDaddy, and the default page comes up fine. Click to log in, and I get a 404.

I'm running under IIS 7 there, so this is unexpected. My routes are pretty plain:

        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
            "Default",                                              
            "{controller}/{action}/{id}",                           
            new { controller = "Public", action = "Index", id = "" } 
        );
        routes.MapRoute(
            "Report1",
            "Report/{action}/{start}/{end}",
            new { controller = "Report", action = "Index" }
        );
        routes.MapRoute(
            "Report2",
            "Report/{action}/{start}/{end}/{idList}",
            new { controller = "Report", action = "Index" }
        );

Any idea what might be going on or how I can troubleshoot this?

Mehrdad Afshari · Accepted Answer · 2009-04-01 12:19:14Z

31

Are you running in IIS7 integrated mode?

Classic mode of IIS7 does not automatically map extensionless URLs to ASP.NET (much like IIS6).

Also make sure your Web.config <system.webServer> tag is configured correctly.

answered Apr 1, 2009 at 12:19

Mehrdad Afshari

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2 Comments

Stuart Over a year ago

Thanks, Mehrdad. Turns out that GoDaddy defaults IIS 7 to classic mode.

Christopher Edwards Over a year ago

<system.webServer> <modules runAllManagedModulesForAllRequests="true"/> </system.webServer>

David d C e Freitas · Accepted Answer · 2014-07-24 23:46:15Z

24

Don't use runAllManagedModulesForAllRequests. You want to let IIS handle resources such as images.

<system.webServer> <!-- Rather do NOT use this -->
  <modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>

Instead add the MVC routing module

<system.webServer>
  <modules>
    <remove name="UrlRoutingModule-4.0" />
    <add name="UrlRoutingModule-4.0" type="System.Web.Routing.UrlRoutingModule" preCondition="" />
  </modules>
</system.webServer>

edited Jul 24, 2014 at 23:46

David d C e Freitas

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answered May 10, 2013 at 4:34

Chris Herring

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4 Comments

Ross Brasseaux Over a year ago

This answer also worked and does appear to have a more efficient (and elegant) approach.

Adam Weber Over a year ago

This method worked well for me in an ASP.NET Web API application. The app worked fined locally, but when deployed to any other environment, I just received a 404 for any Web API request. Added the routing module bits noted above and everything is fine. Similar issue here: stackoverflow.com/questions/15389855/…. Thanks!

Bob Fury Over a year ago

I was pulling my hair out trying to get an MVC app to accept HTTP DELETE requests. This took care of it for me. Thanks!

ios_dotnet_superuser Over a year ago

same problem, the method delete request don't work if i deploy to other environment: iis 8 ok but in other environment (iis 7) i get 404

Stasevich · Accepted Answer · 2011-02-15 00:38:04Z

14

Tried everything, I had to set my web config like this, to make it work.

 <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

answered Feb 15, 2011 at 0:38

Stasevich

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1 Comment

Ross Brasseaux Over a year ago

Wow this actually worked! But why do I have the feeling it will come back to haunt me?

Cedric Berlanger · Accepted Answer · 2013-12-12 11:00:01Z

1

I had the same problem, I uploaded the controller, web.config and other classes but I forgot to upload the bin folder.

After I uploaded the bin folder, it worked!

answered Dec 12, 2013 at 11:00

Cedric Berlanger

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