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URL rewriting using ASP.NET routing

, 7 Jul 2009 CPOL
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MVC style search engine friendly URLs using ASP.NET routing, which comes as an enhancement in SP1 of ASP.NET 3.5.


Sometimes we need to have search engine friendly URLs for our application. In ASP.NET (before ASP.NET MVC/3.5 SP1), we had to use some third party tools like URL rewriter, which work fine but require wild card mapping in IIS and have issues with IIS7.

ASP.NET MVC has introduced the System.Web.Routing assembly for rewriting URLs; now, it is included in ASP.NET 3.5 SP1. Using the routing assembly, you can have search engine friendly URLs like

Now we can use the System.Web.Routing assembly in our ASP.NET website to create such URLs. (Please see the download file from above.)

Using the code

You can find the complete source code from the download provided above ( Unzip the file and open using Visual Studio 2008 (open the website wizard), and you will need to browse to the folder "url_rout" (that should contain the web.config file).

First of all, you have to add a reference to System.Web.Routing in your application, or you can add the following line in the web.config (under the assemblies section). You must have ASP.NET 3.5 SP1 installed.

<add assembly="System.Web.Routing, Version=, 
     Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

Now, we need to create different routes in global.asax. In the first route "Add_New_User", we don't have any parameters; but in the second route "User/{name}", we have a parameter called name.

void Application_Start(object sender, EventArgs e) 
    // Code that runs on application startup
private static void RegisterRoutes()
           new System.Web.Routing.Route("Add_New_User",
               new RouteHandler("~/RegisterUser.aspx")));
           new System.Web.Routing.Route("User/{name}",
               new UserRouteHandler("~/DisplayUser.aspx")));

UserRouteHandler and RouteHandler are classes that implement IRouteHandler, as shown below:

public class UserRouteHandler : IRouteHandler
    public UserRouteHandler(string virtualPath)
        _virtualPath = virtualPath;

    public IHttpHandler GetHttpHandler(RequestContext requestContext)
        var display = BuildManager.CreateInstanceFromVirtualPath(
                      _virtualPath, typeof(Page)) as IUserDisplay;
        display.UniqueName = 
          requestContext.RouteData.Values["name"] as string;
        return display;

     string _virtualPath;

You will notice that IUserDisplay is an interface which implements IHttpHandler:

public interface IUserDisplay : IHttpHandler
    string UniqueName { get; set; }

IUserDisplay has to be implemented by the page to be rendered (DisplayUser.aspx, in this case) as shown below, so that the unique identifier (UniqueName, in the case) or parameter will be found in the page, which can be used to show the appropriate data (like the query string).

public partial class DisplayUser : Page, IUserDisplay
    public string UniqueName { get; set; }

    protected void Page_Load(object sender, EventArgs e)
        if (UniqueName != null && !UniqueName.Equals(""))
        //do some coding

Points of interest

I have found that all samples and tutorials on this topic are for either ASP.NET MVC applications or web projects, and nothing if I want to create a normal ASP.NET website (however, there are not much differences between them). Here are some useful links for routing:


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Apdynamics Inc
United States United States
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Comments and Discussions

GeneralMy vote of 4 Pinmembervsanju27-May-13 1:25 
QuestionURL rewriting using ASP.NET routing Pinmembervsanju27-May-13 1:24 
GeneralMy vote of 5 Pinmembertalhartk17-May-13 1:04 
QuestionUrl Rewritting Question PinmemberDNYANESHWAR KAWATHE18-Mar-13 22:20 
Hi sir, i have implement above url rewritting in 2-3 sample assignment but i am fail to implement where i need.currently i am trying to implement it on site which is live. on localhost i m trying to implement with that site but it fails. When I debug the code with break points the debugger never goes through the GetHttpHandler() function which i mention below
   public IHttpHandler GetHttpHandler(RequestContext requestContext)
            if (requestContext.RouteData.Values["rid"] != null)
                  var display = BuildManager.CreateInstanceFromVirtualPath(_vpath, typeof(Page)) as IUserDisplay;
                  if (display != null)
                        display.regionid= requestContext.RouteData.Values["rid"].ToString();
                        return display;
                        return null;
                  return null;
i tried much to find problem but fails. if u have solution let me know.
Thanks & Regards,
AnswerRe: Url Rewritting Question PinmemberDNYANESHWAR KAWATHE7-May-13 4:35 
Questionhow to get parameter value on destination page. Pinmembermaneeshkatiyar09@gmail.com3-Apr-12 18:29 
SuggestionMore discription Pinmemberatulkath282-Apr-12 11:22 
QuestionYour solution don't work on IIS 6 with Wild Card Entry PinmemberPushkarr3-Feb-12 20:40 
AnswerRe: Your solution don't work on IIS 6 with Wild Card Entry Pinmemberfeng_woalang10-Dec-12 18:06 
QuestionURL ROUTING NOT WORKING PinmemberMember 823849623-Dec-11 2:46 
BugProblem with image and css paths PinmemberKike Vesga4-Oct-11 20:56 
GeneralProblem With UrlRoting PinmemberShrivastva18-Feb-11 3:21 
QuestionIIS settings for URLREWRITING Pinmemberneil@euclid3-Nov-10 2:49 
AnswerRe: IIS settings for URLREWRITING Pinmemberneil@euclid9-Nov-10 2:22 
QuestionProblem with master page and user control Pinmemberjinal.mehta31-May-10 21:32 
AnswerRe: Problem with master page and user control Pinmemberbajpai.anurag1-Jun-10 5:24 
QuestionHow to combine UrlRoutingModule with AjaxControlToolkit Pinmemberusuphan14-Dec-09 6:23 
GeneralBest article on ASP.NET Routing Pinmembernomi198427-Oct-09 4:13 
GeneralA big Thanks PinmemberBjorn van der Neut21-Aug-09 11:40 
QuestionInteresting Pinmemberstixoffire8-Jul-09 6:17 
AnswerRe: Interesting Pinmemberrippo13-Jul-09 22:07 
AnswerRe: Interesting Pinmemberbajpai.anurag13-Jul-09 23:04 
GeneralRe: Interesting PinmemberA. Riazi15-Jul-09 19:00 
GeneralRe: Interesting Pinmemberbajpai.anurag16-Jul-09 4:21 
GeneralRe: Interesting Pinmembersuis10-Sep-10 7:30 

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