Identify tenant from the url in multi-tenant asp.net mvc application - asp.net-mvc

Question

I am creating a multi-tenant asp.net application. I want my url to follow
**http://www.example.com/test1/test2/**{tenantName}/{controller}/{action}
**http://www.example.com/test1/**{tenantName}/{controller}/{action}
**http://www.example.com/**{tenantName}/{controller}/{action}
Here the part of the url in bold is fixed (will not change)
{tenantName}=will be logical tenant instance.
I have followed this link
What will be the routing to handle this?

Answer 1

It's as simple as this:
routes.MapRoute(
"MultiTenantRoute", // Route name
"test1/test2/{tenantName}/{controller}/{action}/{id}", // URL with parameters
new { id = UrlParameter.Optional } // Parameter defaults, if needed
);
The part without braces must match. The parts inside the braces will be transfer into route data parameters. I've added an optional parameter id, as you usualy find in the controllers, but you can customize it. You can also give default values to tenantName, controller or action as usual.
Remember that routes are evaluated in the order they're registered, so you should probably register this route before any other.
EDIT after question update
You cannot specify a catch all parameter like this: {*segment} at the beginning of a route. That's not possible. ASP.NET MVC wouldn't know how many segments to include in this part, and how many to be left for the rest of the parameters in the route.
So, you need to add a route for each possible case,taking into account that the first route that matches will be used. So you'd need routes starting with extra parameters like this:
{tenanName}...
{segment1}{tenanName}...
{segment1}/{segment2}/{tenanName}...
Depending on the structre of the expected urls you may need to add constraints to ensure that the route is being correctly matched. This can be done passing a fourth parameter to thw MapRoute method. This is an anonymous class, like the deafults parameter, but the specified value for each parameter is a constraint. These constraints, on their simplest forma, are simply strings which will be used as regular expressions (regex).
If the expected URLs are extremely variable, then implement yout own routing class.

Answer 2

You could define the route as
routes.MapRoute(
name: "TennantRoute",
url: "test1/test2/{tenantName}/{controller}/{action}",
defaults: new { controller = "Home", action = "Index"}
);
and your action must take parameter with name tenantName because you may want make some decision based on that ...for example
public ActionResult Index(string tenantName)
{
return View();
}
example : http://localhost:19802/test1/test2/PrerakT/Home/Index
Please make sure you define this path above the default route for following urls to work
http://localhost:19802/test1/test2/PrerakT/
http://localhost:19802/test1/test2/PrerakT/Home/
http://localhost:19802/test1/test2/PrerakT/Home/index
What if I want test1 and test2 to be changeable ...
routes.MapRoute(
name: "TennantRoute",
url: "{test1}/{test2}/{tenantName}/{controller}/{action}",
defaults: new { controller = "Home", action = "Index" }
);
and
public ActionResult Index(string tenantName, string test1, string test2)
{
return View();
}
as per your update on the question
routes.MapRoute(
name: "TennantRoute1",
url: "test1/test2/{tenantName}/{controller}/{action}",
defaults: new { controller = "Home", action = "Index" }
);
routes.MapRoute(
name: "TennantRoute2",
url: "test1/{tenantName}/{controller}/{action}",
defaults: new { controller = "Home", action = "Index" }
);
routes.MapRoute(
name: "TennantRoute3",
url: "{tenantName}/{controller}/{action}",
defaults: new { controller = "Home", action = "Index" }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);