c# - Upgrade to MVC3. ashx resource cannot be found. Routing issue? -

i have searched high , low solution problem , have not found one. upgraded mvc2 application mvc3 using guide: http://www.asp.net/whitepapers/mvc3-release-notes#upgrading

i upgraded project vs2008 vs2012. iis 7.5

everything went flawlessly except preview.ashx giving me resource not found. page supposed display preview image when called url in query string. tried changing routes, checking controller names, setting specific page in web settings, etc. pretty sure has routes or setting got screwed during upgrade, cannot figure out.

i have site setup using virtual directory in iis @ http://localhost/comm

edit: rebuilt site using fresh installation of mvc3 , problem still exists. after rebuilding site realized there .aspx files in same directory work fine. .ashx files not routing correctly.

global.asax

public static void registerroutes(routecollection routes) {     routes.ignoreroute("{resource}.axd/{*pathinfo}");     routes.ignoreroute("{resource}.aspx/{*pathinfo}");     routes.ignoreroute("{resource}.ashx/{*pathinfo}");      routes.maproute(         "default", // route name         "{instance}/{controller}/{action}/{id}", // url parameters         new { instance = "demo", controller = "home", action = "index", id = urlparameter.optional } // parameter defaults         );      }      protected void application_start() {             arearegistration.registerallareas();             registerroutes(routetable.routes);     } 

error

the resource cannot found.  description: http 404. resource looking (or 1 of dependencies) have been removed, had name changed, or temporarily unavailable.  please review following url , make sure spelled correctly.   requested url: /comm/views/review/fileviewer.ashx 

i gave trying ashx work , ended building filesresult action in controller returns image. ashx receiving httpcontext in order process image , return it. created action takes path, performs work, , returns image. there wonky .ashx files , mvc routing not figure out. none of ashx files working, can rebuilt actions guess not big deal. below action replaces preview.ashx

public fileresult preview(string path) { // database fetch of image details try {     // relative path     if (!path.isnull()) {         // path         string filepath = path;         string absolutepath = ...          // make sure the file exists         if (system.io.file.exists(absolutepath)) {             // check preview             string previewpath = ...;              // has preview             bool haspreview = true;             // check see if preview exists             if (!system.io.file.exists(previewpath) || system.io.file.getlastwritetime(previewpath) < system.io.file.getlastwritetime(absolutepath)) {                 try {                     // generate preview                     haspreview = ...  != null;                 }                 catch (exception exc) {                     haspreview = false;                 }             }              // once path handled, set type             if (haspreview) {                 return new filestreamresult(new filestream(previewpath, filemode.open), "image/png");             }             // no preview             else                 return writedefault();         }         else             // write default (blank)             return writedefault();     }     else {         return writedefault();     } } catch {     // write default (no_photo)     return writedefault();     } }  private filecontentresult writedefault() {     // write default     system.drawing.bitmap bmp = new bitmap(25, 25);     system.drawing.graphics g = system.drawing.graphics.fromimage(bmp);     g.interpolationmode = system.drawing.drawing2d.interpolationmode.highqualitybicubic;     g.fillrectangle(system.drawing.brushes.white, 0, 0, 25, 25);     bmp = new bitmap(25, 25, g);     memorystream str = new memorystream();     bmp.save(str, imageformat.png);     return file(str.toarray(), "image/png"); }