MVC3ソリューションの構築はうまくいきましたが、ブラウザでエラーが発生しました：
コンパイラエラーメッセージ：CS0234：タイプまたは名前空間名'Html'は名前空間'System.Web.Mvc'に存在しません（アセンブリ参照がありませんか？）
Source Error:
Line 25: <add namespace="System.Web.Mvc" />
Line 26: <!--<add namespace="System.Web.Mvc.Ajax" />-->
Line 27: <add namespace="System.Web.Mvc.Html" />
Line 28: <add namespace="System.Web.Routing" />
Line 29: <add namespace="System.Web.WebPages" />
ソリューションのパケットをインストールNuGetし、すべてのプロジェクト用にセットアップしましたMVC3。MVC3ライブラリSystem.Web.Mvc.Ajaxなど が含まれSystem.Web.Mvc.Htmlていますか？なぜエラーが発生するのですか？
Referencesフォルダーには、System.Web.Mvcがあります。
Runtime version: v4.0.30319、
Version: 3.0.0.0
Web.config
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=152368
-->
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
<add key="webpages:Version" value="1.0.0.0" />
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.5" />
<authentication mode="Forms">
<forms loginUrl="~/Account/LogOn" timeout="2880" />
</authentication>
<pages>
<namespaces>
<add namespace="System.Web.Helpers" />
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.WebPages" />
</namespaces>
</pages>
<httpRuntime targetFramework="4.5" encoderType="System.Web.Security.AntiXss.AntiXssEncoder, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
<machineKey compatibilityMode="Framework45" />
<profile defaultProvider="DefaultProfileProvider">
<providers>
<add name="DefaultProfileProvider" type="System.Web.Providers.DefaultProfileProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/" />
</providers>
</profile>
<membership defaultProvider="DefaultMembershipProvider">
<providers>
<add name="DefaultMembershipProvider" type="System.Web.Providers.DefaultMembershipProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />
</providers>
</membership>
<roleManager defaultProvider="DefaultRoleProvider">
<providers>
<add name="DefaultRoleProvider" type="System.Web.Providers.DefaultRoleProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/" />
</providers>
</roleManager>
<sessionState mode="InProc" customProvider="DefaultSessionProvider">
<providers>
<add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" />
</providers>
</sessionState>
</system.web>
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
</entityFramework>
<connectionStrings>
<add name="EFDbContext" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=SportStore;Integrated Security=True;Pooling=False;" providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
ファイルpackages.config：
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="EntityFramework" version="5.0.0-rc" />
<package id="jQuery" version="1.7.2" />
<package id="jQuery.UI.Combined" version="1.8.11" />
<package id="jQuery.Validation" version="1.9" />
<package id="Microsoft.AspNet.Mvc" version="3.0.20105.1" />
<package id="Microsoft.AspNet.Providers.Core" version="1.0" />
<package id="Microsoft.AspNet.Providers.LocalDB" version="1.0" />
<package id="Microsoft.AspNet.Razor" version="1.0.20105.408" />
<package id="Microsoft.AspNet.WebPages" version="1.0.20105.408" />
<package id="Microsoft.Web.Infrastructure" version="1.0.0.0" />
<package id="Modernizr" version="2.0.6" />
<package id="Moq" version="4.0.10827" />
<package id="Ninject" version="3.0.1.10" />
</packages>