如何在ASP.NET MVC中的控制器之间传递数据？

Question

I'm trying to pass data between controllers using TempData, when I run my project I get below error:

  The SessionStateTempDataProvider class requires session state to be enabled. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace 

for more information about the error and where it originated in the code.

  Exception Details: System.InvalidOperationException: The SessionStateTempDataProvider class requires session state to be 

enabled

here is my web.config:

  <system.web>
    <customErrors mode="Off">
      <error statusCode="404" redirect="~/View/Shared/NotFountError"/>
      <error statusCode="500" redirect="~/View/Shared/InternalServerError"/>
    </customErrors>
    <authentication mode="None"/>
    <compilation debug="true" targetFramework="4.6.2"/>
    <httpRuntime targetFramework="4.5"/>
  <sessionState mode="InProc" />
  </system.web>
  <system.webServer>
    <staticContent>
      <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00"/>
    </staticContent>
    <httpProtocol>
      <customHeaders>
        <remove name="Vary"/>
        <add name="Vary" value="Accept-Encoding"/>
      </customHeaders>
    </httpProtocol>
    <modules runAllManagedModulesForAllRequests="true">
      <remove name="FormsAuthenticationModule"/>
      <add name="SA.Filter.Filter" type="SA.Filter.Filter"/>
    </modules>
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0"/>
      <remove name="OPTIONSVerbHandler"/>
      <remove name="TRACEVerbHandler"/>
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0"/>
    </handlers>
    <directoryBrowse enabled="true"/>
  </system.webServer>

Answer 1

It sounds like the server you're trying to run the application on doesn't have the Session State enabled by default.

You can enable this on a per application basis through your web.config , simply place this in the file:

<system.web>
    ..
    <sessionState mode="InProc" />
</system.web>

This will enable the default in process method of storing session state (server side).

If that doesn't help, it could point to another issue but we'd need to see the full exception information & stack trace.

Answer 2

Google Solved: I added this attribute to the modules node in the web.config and EVERYTHING magically started working:

<modules runAllManagedModulesForAllRequests="true">

It looks like I'm not alone:
Some sample Links are below for your reference.

http://forums.asp.net/p/1293974/2509190.aspx

http://www.flyvergrillen.dk/2009/03/26/being-trapped-in-iis/

I think my pure MVC project (that worked in Test environment) was too simple and may not have forced the MVC framework to require TempData and SessionState, so that's how I'll explain it away ;-)