ASP.NET MVC

Re: Typed ViewPage Using Generics Without Code Behind

koistya — Wed, 22 Oct 2008 21:33:08 GMT

Yep, JeremyS is right. When you turn off ReSharper's Intellesense it works correctly.

Menu -> ReSharper -> Options -> Intellisense -> General -> (*) Visual Studio

Just have careated a ticket related to this issue on JetBrains website:

http://www.jetbrains.net/jira/browse/RSRP-84168

Welcome to vote on it :)

Re: Typed ViewPage Using Generics Without Code Behind

levib — Wed, 22 Oct 2008 21:16:30 GMT

Ah, my browser must have cached the original image before you updated it. My apologies.

Re: Typed ViewPage Using Generics Without Code Behind

koistya — Wed, 22 Oct 2008 21:12:18 GMT

No, look at my last (second) screenshot, i am using System.Web.Mvc.ViewPage<...>

Re: Typed ViewPage Using Generics Without Code Behind

levib — Wed, 22 Oct 2008 21:10:44 GMT

Look very closely at your Inherits attribute. You're looking for a type called ViewsWithoutCodeBehind.Views.Home.Index<...>, but your sample project contains no such type. The behavior you likely wanted is that your view inherits directly from the System.Web.Mvc.ViewPage<...> type, which is what the sample @ Page directive I provided to you does.

Re: Typed ViewPage Using Generics Without Code Behind

JeremyS — Wed, 22 Oct 2008 20:43:33 GMT

koistya:
Maybe it doesn't work when ReSharper is installed...

You're correct - ReSharper doesn't support the CLR notation for generics.

Re: Typed ViewPage Using Generics Without Code Behind

koistya — Wed, 22 Oct 2008 20:32:03 GMT

I have double-checked the declaration. Type name is correct. Maybe it doesn't work when ReSharper is installed... Website buils without problems, displayed correctly in browser, but Intellisense still doesn't work one .aspx/.ascx view pages without code-behind files.

Re: Typed ViewPage Using Generics Without Code Behind

levib — Wed, 22 Oct 2008 19:02:36 GMT

koistya:
You just have explicitly added Version, Culture and PublicKeyToken to my example though all they are optional as far as I know.

No, I did not. Your actual type name was incorrect. Use the typeof(ViewData<>).FullName trick I mentioned earlier in this thread and you will produce the actual correct mangled name for the type.

Re: Typed ViewPage Using Generics Without Code Behind

koistya — Wed, 22 Oct 2008 19:00:05 GMT

You just have explicitly added Version, Culture and PublicKeyToken to my example though all they are optional as far as I know. Anyway I have also added them and have same issues with Intellisense:

Re: Typed ViewPage Using Generics Without Code Behind

levib — Wed, 22 Oct 2008 18:35:35 GMT

Intellisense works just fine; it's just that your @ Page directive is incorrect. It should read (note the Inherits attribute):

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" AutoEventWireup="true" Inherits="System.Web.Mvc.ViewPage`1[[ViewsWithoutCodeBehind.Models.HomeModel, WebSite, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]" %>

Re: Typed ViewPage Using Generics Without Code Behind

koistya — Wed, 22 Oct 2008 10:07:49 GMT

Here is an example:

ViewsWithoutCodeBehind.zip

Intellisense doesn't work without code-behind files and inheriting generic class declared on .aspx page in CLR way.

Re: Typed ViewPage Using Generics Without Code Behind

levib — Wed, 22 Oct 2008 00:20:43 GMT

koistya:
Looks like removing code-behind file and decalring inheriting class on .aspx/.ascx page itself doesn't bring any value. Because intellisense doesn't work in this scenario.

I'm not sure what is meant by that statement. Intellisense works just fine as long as the Inherits attribute is set correctly. The easiest way I've found to do this is to use a typeof() to get a Type corresponding to the ViewPage<> you want, then to look at its Name property. Copy + paste this string into your .aspx file. For example:

Type viewPageType = typeof(ViewPage<IList<Class1>>);
string mangledName = viewPageType.FullName;

In my application, this produces a mangled name of System.Web.Mvc.ViewPage`1[[System.Collections.Generic.IList`1[[MvcApplication5.Models.Class1, MvcApplication5, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]. So the @ Page directive would look like:

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" AutoEventWireup="true" Inherits="System.Web.Mvc.ViewPage`1[[System.Collections.Generic.IList`1[[MvcApplication5.Models.Class1, MvcApplication5, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]" %>

This horrendous-looking name is how the CLR identifies types. It is independent of any language used (VB, C#, C++, dynamic languages, etc.). Since the directives are not language-specific (note that the Language attribute is just a string attribute, but it doesn't change how the directives are parsed), a language-neutral type representation had to be chosen. This is the CLR's language-neutral representation of generics.

Re: Typed ViewPage Using Generics Without Code Behind

koistya — Tue, 21 Oct 2008 18:45:01 GMT

Looks like removing code-behind file and decalring inheriting class on .aspx/.ascx page itself doesn't bring any value. Because intellisense doesn't work in this scenario.

Let's vote for this bug:

https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=104071

Maybe VS dev team will fix it.

Re: Typed ViewPage Using Generics Without Code Behind

JeremyS — Thu, 13 Dec 2007 18:08:18 GMT

I'm glad it works for you :) I didn't actually find any information about this anywhere - I just ran into it when doing some debugging.

Re: Typed ViewPage Using Generics Without Code Behind

ghotiman — Thu, 13 Dec 2007 17:55:38 GMT

Thanks! Where did you find this? It doesn't say anything about it in the online help for the page directive. I thought that the `1 was a typo, but it's not...

After a little more searching I found this: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=104071&wa=wsignin1.0

Re: Typed ViewPage Using Generics Without Code Behind

JeremyS — Thu, 13 Dec 2007 10:02:30 GMT

You need to use the standard CLR notation for generics. For example, I have an Error Handling View which deals with processing exceptions. The view inherits from ViewPage<Exception> so this is what you'd have in the view:

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage`1[[System.Exception, mscorlib]]" %>

Hope this is useful.