Group ASP.NET View State with Session

NCache provides a feature that allows to group ASP.NET View State with a particular session. Due to this dependency, as the session expires, the View State associated with it expires too. The View State and session can reside either on two different caches or on a same cache. To enable this feature, expireViewstateWithSession should be set as True in the ncContentOptimization tag.

<ncContentOptimization>
    <settings enableMinification="false"
               enableViewstateCaching="true"
               groupedViewStateWithSessions="true"
               viewstateThreshold="1"
               cacheUriMapping="true"
               enableTrace="true"
               expireViewstateWithSession="true"
               sessionCacheName="demoSessionCache"
               sessionAppId="demoApp">
      <cacheSettings cacheName="demoCache">
        <expiration type="None" duration="0" >
      </cacheSettings>
    </settings>
  </ncContentOptimization>

Group ASP.NET View State with Session Configuration Members

Following is the grouping for ASP.NET View State with Session Configuration Members:

Member	Description
groupedViewstateWithSessions	Through this property a session can be grouped with ASP.NET View State. All the View States for a session are grouped with sessionId. This allows the retrieval of all View States grouped with a sessionId from the cache with group information. Set this property to True to enable View State grouping with sessions, it's False by default.
expireViewstateWithSession	Setting this property to True will ensure that when a session expires, its associated View State expires too.
sessionAppId	Specifies an identifier to ensure that sessionId remains unique in case multiple applications use the same cache. Its value should be the same as the sessionAppId in the sessionState tag.
sessionCacheName	The name of the cache on which the session data resides. Its value should be the same as the cacheName property in the session state tag.

See Also

Configuring and Using NCache Content Optimization
Limit View State Caching
Page Level Grouping for View State
Distributed Cache for ASP.NET Output Caching
ASP.NET SignalR Backplane Overview