asp.net-mvc – 在mvc中的所有页面中维护查询字符串

public class PreviewRoute : System.Web.Routing.Route
{
    ...

    public override VirtualPathData GetVirtualPath(RequestContext requestContext,RouteValueDictionary values)
    {
        var preview = System.Web.HttpContext.Current.Session["Preview"];

        if (!values.ContainsKey("Preview"))
            values.Add("Preview",preview);

        var path = base.GetVirtualPath(requestContext,values);

        return path;
    }
}

}

随时设置会话[“预览”],您将获得所有网址？预览=真：

System.Web.HttpContext.Current.Session.Add("Preview",true);

更新：

在Global.asax.cs中使用此路由：

routes.Add("Default",new PreviewRoute("{controller}/{action}/{id}",new MvcRouteHandler()) {
        Defaults = new RouteValueDictionary(
            new { controller = "Home",action = "Index",id = "" }
        )
    }
);

代替：

routes.MapRouteLowercase(
    "Default",// Route name
    "{controller}/{action}/{id}",// URL with parameters
    new { controller = "Home",id = "" }  // Parameter defaults
);

你也可以尝试这个扩展：

public static class CustomRouteExtensions
{
    public static void MapPreviewRoute(this RouteCollection routes,string name,string url,object defaults) {
        routes.MapPreviewRoute(name,url,defaults,null);
    }

    public static void MapPreviewRoute(this RouteCollection routes,object defaults,object constraints) {
        if (routes == null) {
            throw new ArgumentNullException("routes");
        }

        if (url == null) {
            throw new ArgumentNullException("url");
        }

        var route = new PreviewRoute(url,new MvcRouteHandler()) {
            Defaults = new RouteValueDictionary(defaults),Constraints = new RouteValueDictionary(constraints)
        };

        if (String.IsNullOrEmpty(name)) {
            routes.Add(route);
        }
        else {
            routes.Add(name,route);
        }
    }
}

在Global.asax.cs中：

routes.MapPreviewRoute(
    "Default",id = "" }  // Parameter defaults
);