.Net 4 Routing not working properly on IIS6 (Stylesheet/Image Intercept)

Question

I have a mobile website, intercepting the stylesheet/images and setting sizes relative to the device. I have been testing it on IIS7 and works fine.

The live site is IIS6 (lil surprise)...

Normal routing for friendly urls works fine, but the stylesheet/images intercept is not doing anything.

Here is a snippet of my global.asax routing section :

public static void RegisterRoutes(RouteCollection routes)
{
                routes.RouteExistingFiles = true;

                routes.MapPageRoute("ImageResizerS", "images/{Sub}/{Path}", "~/Site_Handlers/ImageResize.ashx");
                routes.MapPageRoute("ImageResizer", "images/{Path}", "~/Site_Handlers/ImageResize.ashx");

                routes.MapPageRoute("StyleSheetIntercept", "Styles/{Path}", "~/Site_Handlers/InterceptStyleSheet.ashx");

                routes.MapPageRoute("Landing page", "", "~/Site_Files/LandingPage.aspx");
    }

What seems to be the problem?

What I have noticed :

When I set routes.RouteExistingFiles = true; to false. It creates the same behavior on IIS7 & IIS6...no intercept.

Is the site on IIS 6 a virtual directory or full web site? – Josh Jul 02 '12 at 14:12 — Josh, Jul 02 '12 at 14:12
On it's own domain...it's a full website. – Marc Uberstein Jul 02 '12 at 15:28 — Marc Uberstein, Jul 02 '12 at 15:28

score 1 · Answer 1 · answered Jul 02 '12 at 14:50

In IIS6, you need to enable wildcard mapping to ensure that the correct handler picks up the request (in this case ASP.Net), otherwise it will just be served like a static web page. See Microsoft web site for a how to.

The executable path in step 4 will vary depending on your .Net version, but the easiest way is to copy the value from one of the other mapping that .Net already handles (.aspx, .ashx, etc.)

score 0 · Accepted Answer · edited May 23 '17 at 12:12

On the server, open IIS:

Right-click on the site/virtual directory, select properties
Goto the Home Directory/Virtual Directory tab, click Configuration (near the bottom)
Near the bottom again, click the insert button
Enter C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_isapi.dll - Used v4 in this case.
Uncheck the "Verify that file exists" button, click Okay and close all the dialogues

REFERENCE: ASP.NET routing on IIS 6

.Net 4 Routing not working properly on IIS6 (Stylesheet/Image Intercept)

2 Answers2