使用ActionFilter將編譯視圖（RazorGenerator）設置爲佈局

Question

我從主MVC項目（我們稱之爲Main）創建了一個單獨項目中的佈局視圖（讓我們稱之爲Shared），然後使用RazorGenerator編譯該視圖。當我在主任何MVC頁面使用的佈局正常工作：

@{ 
    Layout = "~/Views/Shared/_Layout.cshtml"; 
} 

然而，當我使用一個ActionFilter這樣設置佈局：

public class LayoutAttribute : ActionFilterAttribute 
{ 
    public override void OnActionExecuted(ActionExecutedContext filterContext) 
    { 
     base.OnActionExecuted(filterContext); 
     var viewResult = filterContext.Result as ViewResult; 
     viewResult.MasterName = "~/Views/Shared/_Layout.cshtml"; 
    } 
} 

，只需在控制器中使用它主要是這樣的：

[Layout] 
public class HomeController : Controller 
{ 
    // GET: Home 
    public ActionResult Index() 
    { 
     return View(); 
    } 
} 

我得到這個錯誤：

The view 'Index' or its master was not found or no view engine supports the searched locations. The following locations were searched: ~/Views/Home/Index.cshtml ~/Views/Shared/Index.cshtml ~/Views/Home/Index.aspx ~/Views/Home/Index.ascx ~/Views/Shared/Index.aspx ~/Views/Shared/Index.ascx ~/Views/Shared/_Layout.cshtml

我真的很想使用內置到Shared項目中的ActionFilter，以便我可以在Main項目（或任何其他項目）中的任何控制器中使用它。

任何想法，爲什麼我得到這個錯誤？

Answer 1

從此改變你的行動：

public class LayoutAttribute : ActionFilterAttribute 

    { 
     public override void OnActionExecuted(ActionExecutedContext filterContext) 
     { 
      base.OnActionExecuted(filterContext); 
      var viewResult = filterContext.Result as ViewResult; 
      viewResult.MasterName = "~/Views/Shared/_Layout.cshtml"; 
     } 
    } 

要在這之下：

public class LayoutAttribute : ActionFilterAttribute 
{ 
    public override void OnActionExecuted(ActionExecutedContext filterContext) 
    { 
     base.OnActionExecuted(filterContext); 
     var viewResult = filterContext.Result as ViewResult; 
     if (viewResult != null) 
     { 
      viewResult.MasterName = "~/Views/Shared/_Layout.cshtml"; 
     } 
    } 
} 

希望有所幫助。