Url Rewriting in Asp.net

Url rewriting is usefull for SEO.It provides us SEO friendly url.

Suppose you want to rewrite the following url

http://www.urlrewrite.com/products.aspx?category=books

http://www.urlrewrite.com/products.aspx?category=DVDs

http://www.urlrewrite.com/products.aspx?category=CDs

to the following

http://www.urlrewrite.com/products/Books

http://www.urlrewrite.com/products/DVDs

http://www.urlrewrite.com/products/CDs

Search engine will take this at three different pages.

For this ,you have to follow the following steps..

Step 1 : Add reference Intelligencia.UrlRewriter

Step 2 : Add following code to Web.config file

<configuration>

  <configsections>

    <section name="rewriter" requirePermission="false" type="Intelligencia.UrlRewriter.Configuration.RewriterConfigurationSectionHandler, Intelligencia.UrlRewriter"/>

  </configSections>

  <system.web>

    <httpmodules>

      <add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule, Intelligencia.UrlRewriter"/>

    </httpModules>

  </system.web>

<system.webServer>

    <modules runAllManagedModulesForAllRequests="true">
      <add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule" />
    </modules>

    <validation validateIntegratedModeConfiguration="false" />

  </system.webServer>

  <rewriter>

    <rewrite url="~/Products/(.+)" to="~/Products.aspx?category=$1"/>

  </rewriter>

</configuration>

To avoid you having to hard-code every URL in your web.config file

 <rewrite url="~/Products/(.+)" to="~/Products.aspx?category=$1"/>

Now ,  you will see the following urls in address bar 

http://www.urlrewrite.com/products/Books

http://www.urlrewrite.com/products/DVDs

http://www.urlrewrite.com/products/CDs