如何通过 Web.config 启用 SessionStateTempDataProvider？

Question

我已将 MVC 应用程序部署到 Web 服务器，并在我的一个按钮上注意到它引发了 SessionStateTempDataProvider class requires session state to be enabled. 错误。

错误解释了很多，我需要启用 SessionStateModule 并将该标签添加到我的 Web.config as explained here。

但是当我编辑 Web.config 并再次运行时，会抛出同样的错误。我必须添加 <module> 属性，因为我的配置文件不包含一个。所以我不确定我的格式是否关闭。模块属性被添加到<system.webServer>

<modules>
    <add name="SessionStateModule" type="System.Web.SessionState.SessionStateModule" />
  </modules>

问题：

如何从 Web.config 文件启用会话状态？

Web.config 文件：

<?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=169433
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data" />
    <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="webpages:Version" value="2.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <dataConfiguration defaultDatabase="NOTIFICATIONEntities" />
  <connectionStrings>
    //omitted connection string for privacy //
  </connectionStrings>
  <system.web>
    <compilation targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
    <customErrors mode="Off"/>
    <authentication mode="Windows" />
    <authorization>
      <deny users="?" />
    </authorization>
    <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.Optimization" />
        <add namespace="System.Web.Routing" />
        <add namespace="System.Web.WebPages" />
      </namespaces>
    </pages>
    <trust level="Full" />
    <identity impersonate="false" />
  </system.web>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
  <handlers><remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" /><remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" /><remove name="ExtensionlessUrlHandler-Integrated-4.0" /><add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" /><add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" /><add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" /></handlers>
  <modules>
    <add name="SessionStateModule" type="System.Web.SessionState.SessionStateModule" />
  </modules>
        <security>
            <authentication>
                <anonymousAuthentication enabled="false" />
            </authentication>
        </security></system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.3.0.0" newVersion="1.3.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v12.0" />
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>
</configuration>

错误截图：

Answer 1

原来的问题是，与我们的本地 IIS 实例相比，服务器 IIS 上没有设置会话状态类型。

将 Session State 属性设置为“InProcess”修复了错误：