Get Layout name in Controller method

问题

I'm using MVC 5 and want to override the below View method in my MVC controller

protected internal virtual ViewResult View(string viewName, string masterName, object model)

I can have a number of different layout views so want to get the current layout name at runtime and pass it to the overriden view method. How do I get the layout name at runtime in the controller?

EDIT I don't think I need to create a custom view engine for what I need to do. I basically only want to set a ViewBag value across multiple methods and controllers and don't want to repeat myself. I have the viewName and model values at runtime, just don't have the layout name to pass as the masterName parameter

protected override ViewResult View(string viewName, string masterName, object model)
{
ViewBag.SomeValue = GetValue();            
return base.View(viewName, masterName, model);
}

回答1:

What are you using to make the decision at runtime - Is there some identifier that will tell you which Master to use??? Maybe you can make a Switch?

Switch (loggedInUser.SomeSpecialValue)
{
Case: "value1":
return "_Layout1.cshtml";
}

How else were you planning to make the decision as to which Layout to show?

Edit: Okay extending the above idea - Maybe something like this can help you:

RouteConfig

routes.MapRoute(
                name: "Default",
                url: "{layout}/{controller}/{action}/{id}",
                defaults: new { layout = "default", controller = "Home", action = "Index", id = UrlParameter.Optional }
            );

HomeController

protected override ViewResult View(string viewName, string masterName, object model)
        {
            var layout = RouteData.Values["layout"].ToString();

            switch (layout)
            {
                case "default":
                    return base.View(viewName, "_layout", model);
                case "test":
                    return base.View(viewName, "_layout2", model);
            }

            return base.View(viewName, masterName, model);
        }

Views Create Layout views as required, and add them to the Shared folder and the switch statement.

Test URL's

http://localhost:64372/ -> Default Layout
http://localhost:64372/default/home/index
http://localhost:64372/test/ -> 2nd Layout
http://localhost:64372/test/home/index

Hope this maybe works for you??

来源：https://stackoverflow.com/questions/34398490/get-layout-name-in-controller-method