类型或命名空间名称不命名空间中存在'System.Web.Mvc“

本文介绍了类型或命名空间名称不命名空间中存在'System.Web.Mvc“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

层楼高MVC3解决方案进行得很顺利，但已经得到浏览器中的一个错误：

编译器错误信息：CS0234：类型或命名空间名称HTML中的命名空间System.Web.Mvc不存在（是否缺少程序集引用？）

源错误：第25行：其中，添加命名空间=System.Web.Mvc/＆GT;第26行：＆LT; - ＆LT;添加命名空间=System.Web.Mvc.Ajax/＆GT; - ＆GT;27号线：其中，添加命名空间=System.Web.Mvc.Html/＆GT;28号线：其中，添加命名空间=System.Web.Routing/＆GT;第29行：其中，添加命名空间=System.Web.WebPages/＆GT;

我已经安装了与的NuGet 解包并为所有项目 MVC3 。请问 MVC3 包括图书馆 System.Web.Mvc.Ajax ， System.Web.Mvc。 HTML 和其他人？为什么我得到的错误？

在引用文件夹，我有System.Web.Mvc

运行时版本：v4.0.30319 ，

版本：3.0.0.0

Web.config文件

＆LT;？XML版本=1.0编码=UTF-8＆GT？;＆LT;！ -   有关如何配置ASP.NET应用程序的更多信息，请访问：  go.microsoft/fwlink/?LinkId=152368   - ＆GT;＆LT;结构＆gt;  ＆LT; configSections＆GT;    ＆LT;！ - 有关Entity Framework的配置的详细信息，请访问go.microsoft/fwlink/?LinkID=237468 - ＆GT;    ＆lt;节名称=的EntityFrameworkTYPE =System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection，的EntityFramework，版本5.0.0.0 =文化=中性公钥= b77a5c561934e089requirePermission =FALSE/＆GT;  ＆LT; / configSections＆GT;  ＆LT;＆的appSettings GT;    ＆LT;添加键=ASPNET：UseTaskFriendlySynchronizationContextVALUE =真/＆GT;    ＆LT;添加键=网页：版本值=1.0.0.0/＆GT;    ＆LT;添加键=ClientValidationEnabledVALUE =真/＆GT;    ＆LT;添加键=UnobtrusiveJavaScriptEnabledVALUE =真/＆GT;  ＆LT; /的appSettings＆GT;  ＆LT;＆的System.Web GT;    ＆LT;编译调试=真targetFramework =4.5/＆GT;    ＆LT;身份验证模式=表格＆GT;      ＆LT;形式loginUrl =〜/帐号/登录超时=2880/＆GT;    ＆LT; /认证＆GT;    ＆LT;网页和GT;      ＆LT;＆命名空间GT;        ＆LT;添加命名空间=System.Web.Helpers/＆GT;        ＆LT;添加命名空间=System.Web.Mvc/＆GT;        ＆LT;添加命名空间=System.Web.Mvc.Ajax/＆GT;        ＆LT;添加命名空间=System.Web.Mvc.Html/＆GT;        ＆LT;添加命名空间=System.Web.Routing/＆GT;        ＆LT;添加命名空间=System.Web.WebPages/＆GT;      ＆LT; /命名空间＆GT;    ＆LT; /页＆GT;    ＆LT;的httpRuntime targetFramework =4.5EN coderType =System.Web.Security.AntiXss.AntiXssEn codeR，System.Web程序，版本= 4.0.0.0，文化=中性公钥= b03f5f7f11d50a3a/＆GT;    ＆LT;的machineKey compatibilityMode =Framework45/＆GT;    ＆LT;型材defaultProvider =DefaultProfileProvider＆GT;      ＆LT;供应商＆GT;        ＆LT;添加名称=DefaultProfileProviderTYPE =System.Web.Providers.DefaultProfileProvider，System.Web.Providers，版本= 1.0.0.0，文化=中性公钥= 31bf3856ad364e35的connectionStringName =DefaultConnection的applicationName =// ＆GT;      ＆LT; /供应商＆GT;    ＆LT; / profile文件＆GT;    ＆LT;会员defaultProvider =DefaultMembershipProvider＆GT;      ＆LT;供应商＆GT;        ＆LT;添加名称=DefaultMembershipProviderTYPE =System.Web.Providers.DefaultMembershipProvider，System.Web.Providers，版本= 1.0.0.0，文化=中性公钥= 31bf3856ad364e35的connectionStringName =DefaultConnectionenablePasswordRetrieval =false的enablePasswordReset设置=真requiresQuestionAndAnswer =假requiresUniqueEmail =假maxInvalidPasswordAttempts =5minRequiredPasswordLength =6minRequiredNonalphanumericCharacters =0passwordAttemptWindow =10的applicationName =//＆GT;      ＆LT; /供应商＆GT;    ＆LT; /会员＆GT;    ＆LT; roleManager defaultProvider =DefaultRoleProvider＆GT;      ＆LT;供应商＆GT;        ＆LT;添加名称=DefaultRoleProviderTYPE =System.Web.Providers.DefaultRoleProvider，System.Web.Providers，版本= 1.0.0.0，文化=中性公钥= 31bf3856ad364e35的connectionStringName =DefaultConnection的applicationName =// ＆GT;      ＆LT; /供应商＆GT;    ＆LT; / roleManager＆GT;    ＆LT;的sessionState模式=是InProccustomProvider =DefaultSessionProvider＆GT;      ＆LT;供应商＆GT;        ＆LT;添加名称=DefaultSessionProviderTYPE =System.Web.Providers.DefaultSessionStateProvider，System.Web.Providers，版本= 1.0.0.0，文化=中性公钥= 31bf3856ad364e35的connectionStringName =DefaultConnection/＆GT;      ＆LT; /供应商＆GT;    ＆LT; /＆的sessionState GT;  ＆LT; /system.web>  ＆LT; system.webServer＆GT;    ＆LT;验证validateIntegratedModeConfiguration =FALSE/＆GT;  ＆LT; /system.webServer>  ＆LT;＆运行GT;    ＆LT; assemblyBinding的xmlns =瓮：架构 - 微软COM：asm.v1＆GT;      ＆LT; dependentAssembly＆GT;        ＆LT; assemblyIdentity名称=System.Web.Mvc公钥=31bf3856ad364e35/＆GT;        ＆LT; bindingRedirect oldVersion =1.0.0.0-2.0.0.0NEWVERSION =3.0.0.0/＆GT;      ＆LT; / dependentAssembly＆GT;    ＆LT; / assemblyBinding＆GT;  ＆LT; /运行＆GT;  ＆LT;＆的EntityFramework GT;    ＆LT; defaultConnectionFactory TYPE =System.Data.Entity.Infrastructure.SqlConnectionFactory，的EntityFramework/＆GT;  ＆LT; /＆的EntityFramework GT;  ＆LT;＆是connectionStrings GT;    ＆LT;添加名称=EFDbContext的connectionString =数据源= \\ SQLEX $ P $干燥综合征;初始目录= SportStore;集成安全性= TRUE;池= FALSE;的providerName =System.Data.SqlClient的/＆GT;  ＆LT; /＆是connectionStrings GT;＆LT; /结构＆gt;

MSDN 的System.Web.Mvc命名空间

文件 packages.config ：

＆LT;？XML版本=1.0编码=UTF-8＆GT？;＆LT;套餐及GT;  ＆LT;包ID =的EntityFramework版本=5.0.0-RC/＆GT;  ＆LT;包ID =jQuery的版本=1.7.2/＆GT;  ＆LT;包ID =jQuery.UI.Combined版本=1.8.11/＆GT;  ＆LT;包ID =jQuery.Validation版本=1.9/＆GT;  ＆LT;包ID =Microsoft.AspNet.Mvc版本=3.0.20105.1/＆GT;  ＆LT;包ID =Microsoft.AspNet.Providers.Core版本=1.0/＆GT;  ＆LT;包ID =Microsoft.AspNet.Providers.LocalDB版本=1.0/＆GT;  ＆LT;包ID =Microsoft.AspNet.Razor版本=1.0.20105.408/＆GT;  ＆LT;包ID =Microsoft.AspNet.WebPages版本=1.0.20105.408/＆GT;  ＆LT;包ID =Microsoft.Web.Infrastructure版本=1.0.0.0/＆GT;  ＆LT;包ID =Modernizr的版本=2.0.6/＆GT;  ＆LT;包ID =起订量版本=4.0.10827/＆GT;  ＆LT;包ID =Ninject版本=3.0.1.10/＆GT;＆LT; /包＆GT;

解决方案

清洁您的解决方案，然后将这些文件的属性设置为复制本地=真。

要复制本地属性设置为True或False

在解决方案资源管理器中，单击显示所有文件按钮，显示引用节点。

• 打开引用节点项目。
• 右键单击引用列表的引用，然后单击属性。与该参考相关的属性出现在属性窗口的列表。
• 在属性窗口，将复制本地属性更改为真或假。

Buiding MVC3 solution went well but have got an error in browser:

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" />

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?

In References folder, I have System.Web.Mvc

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 go.microsoft/fwlink/?LinkId=152368 --> <configuration> <configSections> <!-- For more information on Entity Framework configuration, visit go.microsoft/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 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>

解决方案

Clean your solution and then set the property of those files to Copy Local = True.

To set the Copy Local property to True or False

In Solution Explorer, click the Show All Files button to display the References node.

• Open the References node for the project.
• Right-click a reference in the References list, and click Properties. The properties associated with that reference appear in a list in the Properties window.
• In the Properties window, change the Copy Local property to True or False.