I have a problem
My route have an extra paramater after hierarchical category.
/2009/World/Asia/08/12/bla-bla-bla
asp.net mvc does not support this because my routing should be
{year}/{*category}/{month}/{day}/{name}
i tried use constraint like
year = @"(\d{4})",category = @"((.+)/)+", month = @"(\d{2})", day = @"(\d{2})"
but i cannot find any solution.
Is there any comment?
Thank you
I'm pretty sure that the route handler tokenizes on the slash character so you won't be able to have a category that includes a slash -- though escaping it might work, not sure about that. You might want to format your URL as:
/2009/World+Asia/08/12/bla-bla-bla
This should translate the category as "World Asia".
If that doesn't work then perhaps you need another route that matches on subcategory as well.
{year}/{category}/{subcategory}/{month}/{day}/{name}
Add another rule to your routing with the name parameter.
If I understood well, you want to limit and put some constraints on values can pass as routing sections, You can do it with Route Constraint. Plaese read Creating a Route Constraint (C#) and you will find how that is possible. You can do it same as below:
routes.MapRoute(
"Product",
"Product/{productId}",
new {controller="Product", action="Details"},
new {productId = @"\d+" }
);
The regular expression \d+ matches one or more integers. This constraint causes the Product route to match the following URLs:
/Product/3
/Product/8999
But not the following URLs:
/Product/apple
/Product
Additionally you could write your custom route constraint, Please read Creating a Custom Route Constraint (C#) and see below sample I just copied from This post by Guy Burstein that I think you find it useful:
public class FromValuesListConstraint : IRouteConstraint
{
public FromValuesListConstraint(params string[] values)
{
this._values = values;
}
private string[] _values;
public bool Match(HttpContextBase httpContext,
Route route,
string parameterName,
RouteValueDictionary values,
RouteDirection routeDirection)
{
// Get the value called "parameterName" from the
// RouteValueDictionary called "value"
string value = values[parameterName].ToString();
// Return true is the list of allowed values contains
// this value.
return _values.Contains(value);
}
}
As Guy said: In order to implement a Custom Route Constraint, you should create a class that inherits from IRouteConstraint, and implement the Match method.
Hope this help.
