学步园

<sessionState 
    mode="[Off|InProc|StateServer|SQLServer|Custom]"
    timeout="number of minutes"
    cookieName="session identifier cookie name"
    cookieless=
         "[true|false|AutoDetect|UseCookies|UseUri|UseDeviceProfile]"
    regenerateExpiredSessionId="[True|False]"
    sqlConnectionString="sql connection string"
    sqlCommandTimeout="number of seconds"
    allowCustomSqlDatabase="[True|False]"
    useHostingIdentity="[True|False]"
    stateConnectionString="tcpip=server:port"
    stateNetworkTimeout="number of seconds"
    customProvider="custom provider name">
    <providers>...</providers>
</sessionState>

下面的默认 sessionState 元素不是在 Machine.config 文件或根 Web.config 文件中显式配置的，而是由应用程序返回的默认配置。

<sessionState 
   mode="InProc" 
   stateConnectionString="tcpip=127.0.0.1:42424" 
   stateNetworkTimeout="10" 
   sqlConnectionString="data source=127.0.0.1;Integrated Security=SSPI" 
   sqlCommandTimeout="30" 
   customProvider="" 
   cookieless="UseCookies" 
   cookieName="ASP.NET_SessionId" 
   timeout="20" 
   allowCustomSqlDatabase="false" 
   regenerateExpiredSessionId="true" 
   partitionResolverType="" 
   useHostingIdentity="true">
   <providers>
      <clear />
   </providers>
</sessionState>

示例:
下面的代码示例演示如何指定多个会话状态配置设置。

<sessionState
   mode="SQLServer"
   cookieless="true"
   sqlConnectionString=" Integrated Security=SSPI;data source=MySqlServer;"
   sqlCommandTimeout="10" />
  </system.web>
</configuration>

http://msdn.microsoft.com/zh-cn/library/h6bb9cz9(VS.80).aspx