Url.Action() includes unwanted parameters, trying to have more control
I have a link in a page that goes like this:
Url.Action("List", "Item", new { category = "seasons" })
The Route that matches that page also has a parentGroup and group parameters
Ex: /Seasons/Moober/Blue/1 -> /{category}/{parentGroup}/{group}/{id}
The problem is when I am on that page and use Url.Action, it adds all the missing route values even when I try to generate a link to the categories only /{category}, it will still add parentGroup and group.
I have found this post, that suggests doing it like this:
Url.Action("List", "Item", new { category = "seasons", group = "", parentGroup = "" })
But it does not work for me as it removes them from my url but adds them as parameters: /Seasons?parentGroup=Moober&group=Blue
I am using MVC3. Is there a way to force Url.Action() to use only the provided parameters or to cancel the ones I do not want?
Here are the routes.
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
"ItemFromCategoryParentGroupSubGroup", // Route name
"{category}/{parentGroup}/{group}/{id}/{language}", // URL with parameters
new { controller = "Item", action = "Show", page = 1, language = ConfigurationManager.AppSettings["DefaultLanguage"] }, // Parameter defaults
new
{
category = _validCategory,
parentGroup = _validGroup,
group = _validChildGroup,
id = _validItemInChildGroup
}
);
routes.MapRoute(
"ItemListFromParentGroup", // Route name
"{category}/{parentGroup}/{group}/{language}", // URL with parameters
new { controller = "Item", action = "List", page = 1, language = ConfigurationManager.AppSettings["DefaultLanguage"] }, // Parameter defaults
new
{
category = _validCategory,
parentGroup = _validGroup,
group = _validChildGroup
}
);
routes.MapRoute(
"ItemWithGroup", // Route name
"{category}/{group}/{id}/{language}", // URL with parameters
new { controller = "Item", action = "Show", page = 1, language = ConfigurationManager.AppSettings["DefaultLanguage"] }, // Parameter defaults
new
{
category = _validCategory,
group = _validGroup,
id = _validItemInGroup
}
);
routes.MapRoute(
"ItemListWithGroup", // Route name
"{category}/{group}/{language}", // URL with parameters
new { controller = "Item", action = "List", page = 1, language = ConfigurationManager.AppSettings["DefaultLanguage"] }, // Parameter defaults
new
{
category = _validCategory,
group = _validGroup
}
);
routes.MapRoute(
"ItemListFromCategory", // Route name
"{category}/{language}", // URL with parameters
new { controller = "Item", action = "List", page = 1, language = ConfigurationManager.AppSettings["DefaultLanguage"] }, // Parameter defaults
new
{
category = _validCategory
}
);
Edit:
I have a workaround for the moment that looks like this: Url.RouteUrl("ItemListFromCategory") I am basically forcing the same route that is supposed to be matched by Url.Action("List", "Item", new { category = "seasons" }) And this time no parameters added automatically.
The problem with this is that I am forced to use named routes.
Change your routes
routes.MapRoute(
"SomeRoute", // Route name
"/{category}/{parentGroup}/{group}/{id}",
new {
controller = "DefaultController",
action = "DefaultAction",
parentGroup = UrlParameter.Optional
group = UrlParameter.Optional
id= UrlParameter.Optional
}
);
Make parentGroup , parentGroup, group optional .
Try declaring other parameters as UrlParameter.Optional during route registration and set default value for those parameters in your action. Eg.
MyAction(string category, string group = "", parentGroup = 0)
Hope this helps.
In the end I build custom constrainsts for each routes.
http://msdn.microsoft.com/en-us/library/system.web.routing.route.constraints.aspx
I found that it gives almost full controll over whatever we wish to do with our routes.
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