ASP.NET MVC 2 RC2 Routing - How to clear low-level values when using ActionLink to refer to a higher
- by Gary McGill
[NOTE: I'm using ASP.NET MVC2 RC2.]
I have URLs like this:
/customer/123/order/456/item/index
/customer/123/order/456/item/789/edit
My routing table lists the most-specific routes first, so I've got:
// customer/123/order/456/item/789/edit
routes.MapRoute(
"item", // Route name
"customer/{customerId}/order/{orderId}/item/{itemId}/{action}", // URL with parameters
new { controller = "Items", action = "Details" }, // Parameter defaults
new { customerId = @"\d+", orderId = @"\d+", itemId = @"\d+" } // Constraints
);
// customer/123/order/456/item/index
routes.MapRoute(
"items", // Route name
"customer/{customerId}/order/{orderId}/item/{action}", // URL with parameters
new { controller = "Items", action = "Index" }, // Parameter defaults
new { customerId = @"\d+", orderId = @"\d+" } // Constraints
);
When I'm in the "Edit" page, I want a link back up to the "Index" page. So, I use:
ActionLink("Back to Index", "index")
However, because there's an ambient order ID, this results in the URL:
/Customer/123/Order/456/Item/789/Index
...whereas I want it to "forget" the order ID and just use:
/Customer/123/Order/456/Item/Index
I've tried overriding the order ID like so:
ActionLink("Back to Index", "index", new { orderId=string.empty })
...but that doesn't work.
How can I persuade ActionLink to "forget" the order ID?
