asp.net mvc 4 项目升级到 asp.net mvc5

一、开始

1、打开或新建asp.net mvc 4项目

2、修改 global.asax文件

原：

WebApiConfig.Register(GlobalConfiguration.Configuration);

新：

GlobalConfiguration.Configure(WebApiConfig.Register);

3、删除以下ASP.NET NuGet packages ，使用 Package Manager Console (PMC)进行移除

Uninstall-Package -Id Microsoft.AspNet.WebPages.Administration

Uninstall-Package -Id Microsoft-Web-Helpers

Uninstall-Package -Id Microsoft.AspNet.Mvc.FixedDisplayModes

4、更新ASP.NET NuGet packages 

Update-Package

二、更新Application web.config

<runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <!--Two elements removed for Clarity -->
    <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="1.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
    </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>
    <!--WebGrease element removed for Clarity -->
  </assemblyBinding

　　

修改<appSettings>

<appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>

 修改securityPolicy

<securityPolicy>
   <!--<trustLevel name="Medium"  policyFile="web_mediumtrust.config"/>-->
</securityPolicy>

 三、更新 Views 文件夹中的web.config 

<system.web.webPages.razor>
  <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
  <pages pageBaseType="System.Web.Mvc.WebViewPage">
    <namespaces>
      <add namespace="System.Web.Mvc" />
      <!--Elements removed for Clarity.-->
    </namespaces>
  </pages>
</system.web.webPages.razor>

　　

 <pages
      validateRequest="false"
      pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
      pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
      userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
    <controls>
      <add assembly="System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
    </controls>
  </pages>
</system.web>

　　

<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>

安装Microsoft-Web-Helpers

Install-Package -Id Microsoft.AspNet.WebHelpers

如果有用到 User.IsInRole() ，添加以下代码

<system.webServer>
    <modules>
      <remove name="RoleManager" />
    </modules>
  </system.webServer>

四、最后

修改ProjectName.csproj

找到 ProjectTypeGuids 元素并移除： MVC 4 project GUID, {E3E379DF-F4C6-4180-9B81-6769533ABE47}

重新加载项目、编译、成功。