Asp – MVC Newbie Question about Strongly-Typed Views

asp.net-mvc

I think this is a namespace issue, and the answer is probably dead simple, but I'm new at this MVC stuff.

I have multiple views named "Index." This was not a problem until I tried to create a new, strongly-typed view named "Index."

(For what its worth, I'm trying to follow along with the steps in the NerdDinner sample, but in VB instead of C#.)

When I added the strongly-typed view named "Index," the compiler threw this error:

Base class 'System.Web.Mvc.ViewPage(Of
System.Collections.Generic.List(Of
Models.User))' specified for class
'Index' cannot be different from the
base class 'System.Web.Mvc.ViewPage'
of one of its other partial types.

Can someone enlighten me on why this is happening, and what I can do to alleviate the problem?

Thanks in advance.

VIEW:

<%@ Page Title="" Language="VB" MasterPageFile="~/Views/Shared/Site.Master" 
         AutoEventWireup="false" CodeBehind="Index.aspx.vb" 
         Inherits="SampleSite.Index" %> 
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server"> 
</asp:Content>

Code Behind:

Imports System.Web.Mvc 
Imports System.Collections.Generic 

Partial Public Class Index Inherits System.Web.Mvc.ViewPage(Of List(Of SampleSite.Models.User)) 
End Class

Best Answer

If you say you have multiple "Index pages" then the problem is that all have the same namespace. You have Index(a) derived from ViewPage and Index(b) derived from ViewPage of List(..), since the classes are declared partial and have equal namespaces the compiler tries to put them together in one class but is not possible since they don't inherit from the same base class.

Do this: Index (a) -> Inherits="SampleSite.Index" Index (b) -> Inherits="SampleSite.XXXXXXX.Index" and modify the code behind accordingly.

Related Solutions

Asp.net-mvc – Compile Views in ASP.NET MVC

From the readme word doc for RC1 (not indexed by google)

ASP.NET Compiler Post-Build Step

Currently, errors within a view file are not detected until run time. To let you detect these errors at compile time, ASP.NET MVC projects now include an MvcBuildViews property, which is disabled by default. To enable this property, open the project file and set the MvcBuildViews property to true, as shown in the following example:

<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <MvcBuildViews>true</MvcBuildViews>
  </PropertyGroup>

Note Enabling this feature adds some overhead to the build time.

You can update projects that were created with previous releases of MVC to include build-time validation of views by performing the following steps:

Open the project file in a text editor.
Add the following element under the top-most <PropertyGroup> element: <MvcBuildViews>true</MvcBuildViews>
At the end of the project file, uncomment the <Target Name="AfterBuild"> element and modify it to match the following:

<Target Name="AfterBuild" Condition="'$(MvcBuildViews)'=='true'">
    <AspNetCompiler VirtualPath="temp" PhysicalPath="$(ProjectDir)\..\$(ProjectName)" />
</Target>

Asp.net-mvc – Can an ASP.NET MVC View use a Model from a different project

Double-check that your Views/Web.config has the namespace of your referenced project:

<system.web>
  <pages>
    <namespaces>
      <add namespace="SolutionName.WpfApplication1.Model1Entities" />
    </namespaces>
  <pages>
</system.web>

UPDATE:

I don't have any WPF applications to test this on...I thought you were attempting to use a "Class Library" project. That will definitely work. Is it possible to refactor your application slightly to pull out the "Models" into their own project? That way you can compile it as a Class Library.

UPDATE 2:

Odd, it's almost as if your page is not inheriting correctly from System.Web.Mvc. Make sure your Views/Web.config looks like this:

<?xml version="1.0"?>
<configuration>

  <system.web>
    <httpHandlers>
      <add path="*" verb="*"
          type="System.Web.HttpNotFoundHandler"/>
    </httpHandlers>
    <pages validateRequest="false"
            pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
            pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
            userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <controls>
        <add assembly="System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
      </controls>
      <namespaces>
        <add namespace="SolutionName.WpfApplication1.Model1Entities"/>
      </namespaces>
    </pages>

  </system.web>

  <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <handlers>
      <remove name="BlockViewHandler"/>
      <add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.HttpNotFoundHandler"/>
    </handlers>
  </system.webServer>
</configuration>

UPDATE 3: The runtime error looks like it's not an MVC project.

Best Answer

Related Solutions

Asp.net-mvc – Compile Views in ASP.NET MVC

Asp.net-mvc – Can an ASP.NET MVC View use a Model from a different project

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