命名空间“System.Web.Mvc"中不存在类型或命名空间名称 [英] The type or namespace name does not exist in the namespace 'System.Web.Mvc'
本文介绍了命名空间“System.Web.Mvc"中不存在类型或命名空间名称的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
构建 MVC3 解决方案进展顺利，但在浏览器中出现错误:
Buiding MVC3 solution went well but have got an error in browser:
编译器错误消息:CS0234:命名空间System.Web.Mvc"中不存在类型或命名空间名称Html"(您是否缺少程序集引用?)
Compiler Error Message: CS0234: The type or namespace name 'Html' does not exist in the namespace 'System.Web.Mvc' (are you missing an assembly reference?)
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" />
我已经使用 NuGet 为解决方案安装了数据包，并为所有项目 MVC3 进行了设置.MVC3 是否包含System.Web.Mvc.Ajax、System.Web.Mvc.Html 等库?为什么我会收到错误消息?
I have installed packets for the solution with NuGet and set up for all projects MVC3. Does MVC3 include libraries System.Web.Mvc.Ajax, System.Web.Mvc.Html and others? Why am I getting the error?
在 References 文件夹中，我有 System.Web.Mvc
In References folder, I have System.Web.Mvc
运行时版本:v4.0.30319,
Version: 3.0.0.0
<小时>
Web.config
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>
MSDN System.Web.Mvc 命名空间
MSDN the System.Web.Mvc namespace
file 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>
推荐答案
清理您的解决方案，然后将这些文件的属性设置为 Copy Local = True.
Clean your solution and then set the property of those files to Copy Local = True.
将 Copy Local 属性设置为 True 或 False
To set the Copy Local property to True or False
在解决方案资源管理器中，单击显示所有文件"按钮以显示引用"节点.
In Solution Explorer, click the Show All Files button to display the References node.
- 打开项目的引用节点.
- 右键单击引用列表中的引用，然后单击属性.与该引用关联的属性显示在属性"窗口的列表中.
- 在属性"窗口中，将复制本地"属性更改为 True 或 False.
这篇关于命名空间“System.Web.Mvc"中不存在类型或命名空间名称的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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