Question

I have an asp.net web application and right now users can get there profiles by putting int http://www.webdomain.com/page.aspx?usename=myusername. I would like to change it to http://www.webdomain.com/username. Thanks for any help.

Answer 1

Sample IRouteConstraint:

public class IsUserActionConstraint : IRouteConstraint
{
    //This is a static variable that handles the list of users
    private static List<string> _users;


    //This constructor loads the list of users on the first call
    public IsUserActionConstraint()
    {
        _users= (from u in Models.Users.Get() select u.Username.ToLower()).ToList();
    }


    //Code for checking to see if the route is a username
    public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
    {
        return _users.Contains((values["username"] as string).ToLower());
    }


}

And, to register the route in the Global.asax:

 routes.MapRoute(
            "User Profile", // Route name
            "{username}", 
            new { controller = "User", action = "Index", id = UrlParameter.Optional },//  This stuff is here for ASP.NET MVC
  new { IsUserAction = new IsUserActionConstraint() } //Your IRouteconstraint
        );

In my case, my user list never changes during the application life cycle so I can cache it by using a static list. I would suggest that you modify the code so that you’re doing what ever check to make sure the value entered is a username inside of the Match.