Question

ViewBag错误：＆＃34;无法找到编译动态表达式所需的一种或多种类型。您是否缺少装配参考？＆＃34;

所有HTML Helper方法都包含错误：＆＃34;方法的类型参数无法从使用中推断出来。请尝试明确指定类型参数。＆＃34;

在过去两天花了很多时间挖掘与此错误相关的其他帖子后，我就是这样做了：

修复Visual Studio
重新安装Visual Studio
确保我引用了Microsoft.CSharp和System.Core
添加到global.asax：ViewEngines.Engines.Clear（）; ViewEngines.Engines.Add（new CustomRazorViewEngine（））;
将Microsoft.CSharp Copy Local的参考值从false更改为True
今天我安装了更新RC 3
检查GAC版本（仅包含版本4.0.0.0）
卸载/重新安装最新版本的.NET框架

以下是我的观点Web.Config：

<?xml version="1.0"?>

<configuration>
  <configSections>
    <sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
      <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    </sectionGroup>
  </configSections>

  <system.web.webPages.razor>
    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.2.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <pages pageBaseType="System.Web.Mvc.WebViewPage">
      <namespaces>
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Optimization"/>
        <add namespace="System.Web.Routing" />
        <add namespace="WebApplication14" />
      </namespaces>
    </pages>
  </system.web.webPages.razor>

  <appSettings>
    <add key="webpages:Enabled" value="false" />
  </appSettings>

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

Web.Config ：

<?xml version="1.0"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=301880
  -->
<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=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
  </configSections>
  <connectionStrings>
    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;AttachDbFilename=|DataDirectory|\aspnet-WebApplication14-20140703071149.mdf;Initial Catalog=aspnet-WebApplication14-20140703071149;Integrated Security=True" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0"/>
    <add key="webpages:Enabled" value="false"/>
    <add key="ClientValidationEnabled" value="true"/>
    <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
  </appSettings>
  <system.web>
    <authentication mode="None"/>
    <compilation debug="true" targetFramework="4.0"/>
    <httpRuntime/>
  </system.web>
  <system.webServer>
    <modules>
      <remove name="FormsAuthentication"/>
    </modules>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed"/>
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-5.2.0.0" newVersion="5.2.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-1.5.2.14234" newVersion="1.5.2.14234"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0"/>
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
    </providers>
  </entityFramework>
</configuration>

这是我的Global.asax：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace WebApplication14
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }
}

在这一点上真的不知所措。这是在开设一个全新的MVC项目以及旧项目时发生的。我想在新的安装和更新后，错误会消失，但我错了。任何帮助将不胜感激。

示例代码：

   @model WebApplication14.Models.ResetPasswordViewModel
    @{
        ViewBag.Title = "Reset password";
    }

    <h2>@ViewBag.Title.</h2>

    @using (Html.BeginForm("ResetPassword", "Account", FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
    {
        @Html.AntiForgeryToken()
        <h4>Reset your password.</h4>
        <hr />
        @Html.ValidationSummary("", new { @class = "text-danger" })
        @Html.HiddenFor(model => model.Code)
        <div class="form-group">
            @Html.LabelFor(m => m.Email, new { @class = "col-md-2 control-label" })
            <div class="col-md-10">
                @Html.TextBoxFor(m => m.Email, new { @class = "form-control" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(m => m.Password, new { @class = "col-md-2 control-label" })
            <div class="col-md-10">
                @Html.PasswordFor(m => m.Password, new { @class = "form-control" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(m => m.ConfirmPassword, new { @class = "col-md-2 control-label" })
            <div class="col-md-10">
                @Html.PasswordFor(m => m.ConfirmPassword, new { @class = "form-control" })
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" class="btn btn-default" value="Reset" />
            </div>
        </div>
    }

    @section Scripts {
        @Scripts.Render("~/bundles/jqueryval")
    }

Answer 1

我也有这个问题。执行以下步骤后，此问题已修复：

已安装的Visual Studio update 3
删除所有临时文件（来自\ Windows \ Microsoft.NET \ Framework64 \ v4.0.30319 \ Temporary ASP.NET Files，\ Windows \ Microsoft.NET \ Framework \ v4.0.30319 \ Temporary ASP.NET Files，\ AppData \ Local \ Temp \ Temporary ASP.NET Files \ root）
从项目文件夹和csproj.user
创建一个新的asp.net mvc应用程序并将Views web.config复制到旧应用程序中。这里有旧的（左）和新的（右）之间的差异：http://screencast.com/t/x4WisCWf

编辑：忽略比较文件中的第20行。

Answer 2

VM崩溃后我遇到了类似的问题。解决我的问题的关键步骤是Boies Ioan的第二个问题 - 特别是提到的最后一个文件夹：

＆＃34;删除所有临时文件（来自\ Windows \ Microsoft.NET \ Framework64 \ v4.0.30319 \ Temporary ASP.NET Files，\ Windows \ Microsoft.NET \ Framework \ v4.0.30319 \ Temporary ASP.NET Files ， \ AppData \ Local \ Temp \ Temporary ASP.NET Files \ root ）＆＃34;

Answer 3

尝试重建解决方案（按 F6 ）。这为我修好了。

ViewBag和HtmlHelper错误：“无法找到编译动态表达式所需的一种或多种类型。您是否缺少程序集引用？”

3 个答案: