URL Routing with ASP.NET 4.0 has never been easier. While it was first a luxury of ASP.NET MVC,
WebForms applications got routing support with .NET 3.5 SP1. With version 4.0 of the framework, setting
up URL routing is now a piece of cake. For those of you who have never heard of it: URL Routing enables
your application to use URLs that do not directly map to physical files, but can instead represent a
user-friendlier, more descriptive, logical structure. It is not URL rewriting and not URL mapping, where
these effectively restore the original physical URL of the page down the request pipe.
As of Q2 2010 version of Telerik controls for ASP.NET AJAX, RadDataPager SEO paging now
supports URL Routing. Setting it up is all a matter of giving values to a couple of properties in the RadDataPager:
Effectively, RadDataPager requires that you indicate routing is used for your application (by setting
AllowRouting). It then needs to know:
The name of the route that leads to the target .aspx page containing the datapager - specified
in RadDataPager by the RouteName property.
The name of the URL parameter that specifies the current page index - specified in RadDataPager by
the RoutePageIndexParameterName property.
In the following example a route is defined in Global.asax file that leads to DataPagerRouting.aspx.
The route defines a single URL parameter with a default value of 1. This parameter will be used to specify
the current page index in RadDataPager. To take advantage of this route setup the RadDataPager is configured
to use this route. The route name and the name of the URL parameter that specifies the page index are set.
Page Size Support
Until Q2 2013, the RadDataPager SEO functionality has been saving the solely current page index in the URL.
Although on a first glance this may seem enough, it is not. In a real life scenario the page size can be modified by the
users and this will render the SEO links invalid. This is why from Q2 2013, following the RadGrid behavior, we decided to
introduce support for page size in the SEO URL links.
No breaking changes are made thus the existing applications that use this functionality will continue to behave as expected.
Normally, a routed URL link looks like this:
Similar to the SEO paging, the syntax is PageIndex_PageSize. Again, if no page size is set a default value of 10 is assumed.
When using routing, there is no need of DataPagerID parameter as the order of the controls in the URL is defined in the page route
in the Global.asax file.
For more details about ASP.NET Routing, please check the following links: