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POASP.NET MVC 4 Areas within Areas won't render the Shared _Layout.vbhtml from Master project
 

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  1. POASP.NET MVC 4 Areas within Areas won't render the Shared _Layout.vbhtml from Master project
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    <p>Ok so I have this interesting ASP.NET MVC 4 solution/project structure, which creates pluggable application modules. I created it following this technique:</p> <p><a href="http://geekswithblogs.net/cokobware/archive/2013/01/15/asp.net-mvc-4-pluggable-application-modules.aspx" rel="nofollow">http://geekswithblogs.net/cokobware/archive/2013/01/15/asp.net-mvc-4-pluggable-application-modules.aspx</a></p> <p>As a result, I have a main application with an empty Areas folder in the project. I also have a Plugin project that resides in the Areas folder of the main application on disk, and it also sets its build output folder to the main application <code>\bin</code> folder.</p> <p>In my pluggable module application, I decided to create an Areas section within it, and created an Area called Test. By default, the ASP.NET MVC 4 view engine doesn't support it as a pluggable module because it tries to look for the View in the incorrect location. </p> <p>So conceptually, we have:</p> <pre><code>Main &lt;- Main application folder Areas &lt;- Main application folder Plugin &lt;- Plugin module application folder Areas &lt;- Plugin module application folder Test &lt;- Plugin module application folder </code></pre> <p>To fix this, I created a way to interpret the <code>AreaName</code> property in a customized <code>RazorViewEngine</code> class to rewrite the URL the view engine is looking for to find the view files in these pluggable module areas.</p> <p>First, I use the following convention to define my Area registration class for the Test Area belonging to my pluggable modules:</p> <pre><code>Namespace Areas.Plugin Public Class PluginAreaRegistration Inherits AreaRegistration Public Overrides ReadOnly Property AreaName() As String Get Return "Plugin.Test" End Get End Property Public Overrides Sub RegisterArea(ByVal context As System.Web.Mvc.AreaRegistrationContext) context.MapRoute( _ "Plugin_default", _ "Plugin/Test/{controller}/{action}/{id}", _ New With {.controller = "Home", .action = "Index", .id = UrlParameter.Optional}, {"Plugin.Test.Controllers"} ) End Sub End Class End Namespace </code></pre> <p>I then inherited the the <code>RazorViewEngine</code> and overrode some methods to parse and generate the views path in the pluggable module's Areas folder:</p> <pre><code>Public Class MyExtendedRazorViewEngine Inherits RazorViewEngine ' set the location format strings Public Sub New() MyBase.PartialViewLocationFormats = _ { "~/Views/{1}/{0}.cshtml", "~/Views/{1}/{0}.vbhtml", "~/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{2}/Views/{1}/{0}.vbhtml", "~/Views/Shared/{0}.cshtml", "~/Views/Shared/{0}.vbhtml", "~/Areas/{3}/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{3}/Areas/{2}/Views/{1}/{0}.vbhtml", "~/Areas/{1}/Views/Shared/{0}.cshtml", "~/Areas/{1}/Views/Shared/{0}.vbhtml", "~/Areas/{2}/Areas/{1}/Views/{0}.cshtml", "~/Areas/{2}/Areas/{1}/Views/{0}.vbhtml" } MyBase.AreaViewLocationFormats = { "~/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{2}/Views/{1}/{0}.vbhtml", "~/Areas/{2}/Views/Shared/{0}.cshtml", "~/Areas/{2}/Views/Shared/{0}.vbhtml", "~/Areas/{2}/Areas/{1}/Views/{0}.cshtml", "~/Areas/{2}/Areas/{1}/Views/{0}.vbhtml" } MyBase.AreaMasterLocationFormats = { "~/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{2}/Views/{1}/{0}.vbhtml", "~/Areas/{2}/Views/Shared/{0}.cshtml", "~/Areas/{2}/Views/Shared/{0}.vbhtml", "~/Areas/{2}/Areas/{1}/Views/{0}.cshtml", "~/Areas/{2}/Areas/{1}/Views/{0}.vbhtml" } MyBase.AreaPartialViewLocationFormats = { "~/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{2}/Views/{1}/{0}.vbhtml", "~/Areas/{2}/Views/Shared/{0}.cshtml", "~/Areas/{2}/Views/Shared/{0}.vbhtml", "~/Areas/{2}/Areas/{1}/Views/{0}.cshtml", "~/Areas/{2}/Areas/{1}/Views/{0}.vbhtml" } MyBase.ViewLocationFormats = { "~/Views/{1}/{0}.cshtml", "~/Views/{1}/{0}.vbhtml", "~/Views/Shared/{0}.cshtml", "~/Views/Shared/{0}.vbhtml" } MyBase.MasterLocationFormats = { "~/Views/{1}/{0}.cshtml", "~/Views/{1}/{0}.vbhtml", "~/Views/Shared/{0}.cshtml", "~/Views/Shared/{0}.vbhtml" } MyBase.PartialViewLocationFormats = { "~/Views/{1}/{0}.cshtml", "~/Views/{1}/{0}.vbhtml", "~/Views/Shared/{0}.cshtml", "~/Views/Shared/{0}.vbhtml" } End Sub Protected Overrides Function CreatePartialView(controllerContext As ControllerContext, partialPath As String) As IView Dim area As String = controllerContext.RouteData.DataTokens.Item("Area") Dim areaname As String() Dim pp As String = partialPath If Not area Is Nothing Then areaname = area.Split(".") If areaname.Length &gt; 1 Then pp = pp.Replace(area, areaname(0) &amp; "/Areas/" &amp; areaname(1)) End If End If Return MyBase.CreatePartialView(controllerContext, pp) End Function Protected Overrides Function CreateView(controllerContext As ControllerContext, viewPath As String, masterPath As String) As IView Dim area As String = controllerContext.RouteData.DataTokens.Item("Area") Dim areaname As String() Dim vp As String = viewPath Dim mp As String = masterPath If Not area Is Nothing Then areaname = area.Split(".") If areaname.Length &gt; 1 Then vp = vp.Replace(area, areaname(0) &amp; "/Areas/" &amp; areaname(1)) mp = mp.Replace(area, areaname(0) &amp; "/Areas/" &amp; areaname(1)) End If End If Return MyBase.CreateView(controllerContext, vp, mp) End Function Protected Overrides Function FileExists(controllerContext As ControllerContext, virtualPath As String) As Boolean Dim area As String = controllerContext.RouteData.DataTokens.Item("Area") Dim areaname As String() Dim vp As String = virtualPath If Not area Is Nothing Then areaname = area.Split(".") If areaname.Length &gt; 1 Then vp = vp.Replace(area, areaname(0) &amp; "/Areas/" &amp; areaname(1)) End If End If Return MyBase.FileExists(controllerContext, vp) End Function End Class </code></pre> <p>I've modified the main application <code>Global.asax</code> file to pick up the new view engine:</p> <pre><code>Imports System.Web.Http Imports System.Web.Optimization Public Class MvcApplication Inherits System.Web.HttpApplication Sub Application_Start() AreaRegistration.RegisterAllAreas() WebApiConfig.Register(GlobalConfiguration.Configuration) FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters) RouteConfig.RegisterRoutes(RouteTable.Routes) BundleConfig.RegisterBundles(BundleTable.Bundles) ViewEngines.Engines.Clear() ViewEngines.Engines.Add(New MyExtendedRazorViewEngine()) End Sub End Class </code></pre> <p>After launching the browser and invoking the Home controller for my main application, I see the correct pages and layout render. When I go to the Home controller action for the Index for my Plugin module, again the Index view renders properly with the <code>_Layout.vbhtml</code> being picked up from the main application. </p> <p>However, when I invoke the Home controller action for the Index view of Plugin's Test Area, I can only see the Index page view render, but the master <code>_Layout.vbhtml</code> isn't being included from the main application.</p> <p>What am I missing to get the Areas views below the Plugin pluggable module to render the main application's master layout template?</p>
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    1. PTQuestion
    1. USCokoBWare
    1. USCokoBWare
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      1. POASP.NET MVC 4 Areas within Areas won't render the Shared _Layout.vbhtml from Master project
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      1. VTUpMod
    1. COI have the same problem and I solved it by set Layout property explicitly inside the area views `Layout = "~/Views/Shared/_Layout.cshtml";`, But I think that is not the solution we are looking for.
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      1. POASP.NET MVC 4 Areas within Areas won't render the Shared _Layout.vbhtml from Master project
      1. USAmir Ismail
 

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