我可以从HttpContext的控制器？

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给定一个的HttpContext（或HttpContextBase），有没有办法让控制器的一个实例？

解决方案

的的HttpContext 将举行的一个参考 MvcHandler ，将举行一个参考的RouteData ，这将坚持是由一个特定的路线调用什么控制器的引用。

  

注：这不会给你的实际控制人，只有控制器  该特定路线是要  赶上。

GetController（HttpContextBase的HttpContext）{    VAR的RouteData =（（MvcHandler）httpContext.Handler）.RequestContext.RouteData;    VAR routeValues​​ = routeData.Values​​;    VAR matchedRouteBase = routeData.Route;    VAR matchedRoute = matchedRouteBase干线;    如果（matchedRoute！= NULL）    {        路线= matchedRoute.Url？的String.Empty;    }    AssignRouteValues​​（HttpContext的，routeValues​​）;}受保护的虚拟VirtualPathData getVirtualPathData（HttpContextBase HttpContext的，RouteValueDictionary routeValues​​）{    返回RouteTable.Routes.GetVirtualPath（（（MvcHandler）httpContext.Handler）.RequestContext，routeValues​​）;}私人无效AssignRouteValues​​（HttpContextBase HttpContext的，RouteValueDictionary routeValues​​）{    VAR virtualPathData = getVirtualPathData（HttpContext的，routeValues​​）;    如果（virtualPathData！= NULL）    {        VAR vpdRoute = virtualPathData.Route干线;        如果（vpdRoute！= NULL）        {            RouteDefaults = vpdRoute.Defaults;            RouteConstraints = vpdRoute.Constraints;            RouteDataTokens = virtualPathData.DataTokens;            RouteValues​​ = routeValues​​;        }    }}

这code可能看起来很熟悉，那是因为我从菲尔哈克的的路线调试器源$ C ​​$ C。

Given an HttpContext (or HttpContextBase), is there a way to get an instance of the Controller?

解决方案

The HttpContext will hold a reference to the MvcHandler, which will hold a reference to the RouteData, which will hold a reference to what controller is being invoked by a particular route.

NB: This doesn't give you the actual controller, only the controller that the specific route is going to catch.

GetController(HttpContextBase httpContext) { var routeData = ((MvcHandler)httpContext.Handler).RequestContext.RouteData; var routeValues = routeData.Values; var matchedRouteBase = routeData.Route; var matchedRoute = matchedRouteBase as Route; if (matchedRoute != null) { Route = matchedRoute.Url ?? string.Empty; } AssignRouteValues(httpContext, routeValues); } protected virtual VirtualPathData getVirtualPathData(HttpContextBase httpContext, RouteValueDictionary routeValues) { return RouteTable.Routes.GetVirtualPath(((MvcHandler)httpContext.Handler).RequestContext, routeValues); } private void AssignRouteValues(HttpContextBase httpContext, RouteValueDictionary routeValues) { var virtualPathData = getVirtualPathData(httpContext, routeValues); if (virtualPathData != null) { var vpdRoute = virtualPathData.Route as Route; if (vpdRoute != null) { RouteDefaults = vpdRoute.Defaults; RouteConstraints = vpdRoute.Constraints; RouteDataTokens = virtualPathData.DataTokens; RouteValues = routeValues; } } }

This code may look familiar, it's because I've adapted it from Phil Haack's route debugger source code.