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Show / Hide Table of Contents
  • Programmer's Guide
  • Client Side API Programming
    • Setting Up Development Environment
    • Basic Cache Operations
      • Initialize Cache
      • Add Data to Cache
      • Update Data in Cache
      • Fetch Data From Cache
      • Remove Data From Cache
      • Dispose Cache
    • Bulk Operations
      • Adding Collection to Cache
      • Updating Collection in Cache
      • Retrieving Collection from Cache
      • Removing Collection from Cache
      • Deleting Collection from Cache
    • Asynchronous Operations
      • Using Asynchronous Operations
      • Using Asynchronous Operations with Callback Methods
    • Groups and Subgroups
      • Adding/Updating Data Group in Cache
      • Retrieving Data Group from Cache
      • Removing Data Group from Cache
    • Tagging Data in NCache
      • Creating Tags
      • Adding Items with Tags
      • Retrieving Previously Tagged Data
      • Removing Tagged Items from Cache
    • Named Tags
    • Data Expiration Strategies
      • Using Absolute Expiration
      • Using Sliding Expiration
    • Cache Dependencies
      • Key Dependency
      • File Dependency
      • Notification based Dependencies
        • Database Dependency using SQL Server
        • Database Dependency using Oracle
      • Polling Based Dependency
      • Custom Data Source Dependency
      • Multiple Cache Sync Dependency
      • Aggregate Dependency
      • Add Dependency to Existing Item
      • Using CLR Procedures to Call NCache
    • Locking Data in NCache
      • Locking Items in Cache (Pessimistic Locking)
      • Locking Items with Cache Item Versioning (Optimistic Locking)
    • SQL Reference for NCache
      • SQL Syntax
      • Querying Samples for Operators
      • Querying Data in NCache
      • NCache Language Integrated Query (LINQ)
        • Using LINQ in NCache
        • Configuring LINQPad for NCache
        • Querying NCache Data in LINQPad
    • Event Notifications
      • Cache Level Event Notifications
      • Item Level Event Notifications
      • Custom Event Notifications
    • Publish/Subscribe (Pub/Sub) in NCache
      • Pub/Sub Topics
      • Managing Topics
      • Pub/Sub Messages
        • Message Behavior and Properties
        • Creating a Message
      • Publish Messages to Topic
      • Subscribe for Topic Messages
      • Monitoring Pub/Sub Topics
    • Continuous Query
    • Using Streams in NCache
      • Opening with Stream Modes
      • Adding and Updating Data with Streams
      • Retrieving Data from Streams
      • Closing a Stream
    • Security and Encryption
      • NCache Security
      • NCache Data Encryption
    • Data Compression
    • NCache Management API
  • Server Side API Programming
    • Cache Startup Loader
      • Components of Cache Startup Loader
      • Sample Implementation of ICacheLoader on Single Node
      • Sample Implementation of ICacheLoader with Distribution Hints
    • Data Source Providers (Backing Source)
      • Read-Through Caching
        • Configure Read-Through Provider
        • Using Read-Through with Cache Operations
      • Write-Through Caching
        • Configuring Write-Through Provider
        • Using Write-Through with Basic Operations
        • Using Write-Behind with Basic Operations
        • Using Write-Behind with Bulk Operations
        • Using Write-Behind with Async Operations
        • Monitor Write-Through Counters
    • Custom Dependency
      • Sample Implementation of Custom Dependency
      • Sample Usage of Custom Dependency
    • WAN Replication through Bridge
      • Bridge Configurations
      • Implementing Bridge Conflict Resolver
    • Entry Processor
      • Sample Implementation of IEntryProcessor Interface
      • Sample Usage of EntryProcessor
    • MapReduce
      • Sample Implementation of MapReduce Interfaces
      • Sample Usage of MapReduce
    • Aggregator
      • Sample Implementation of IValueExtractor Interface
      • Sample Implementation of IAggregator Interface
      • Sample Usage of Aggregator
    • Dynamic Compact Serialization
  • Client Side ASP.NET Features
    • ASP.NET
      • ASP.NET Session State Provider for NCache
      • Multi-Region ASP.NET Session State Provider for NCache
    • ASP.NET Core
      • Session Storage in ASP.NET Core
        • Configure NCache ASP.NET Core Session Provider
        • Configure ASP.NET Core Sessions with NCache IDistributedCache Provider
      • Multi-Region ASP.NET Core Session Provider for NCache
      • Object Caching in ASP.NET Core
    • ASP.NET SignalR
      • Using NCache Extension for SignalR
    • View State Caching
      • Configuring and Using Content Optimization
      • Group View State with Sessions
      • Limit View State Caching
      • Perform Page Level Grouping for View State
    • ASP.NET Output Cache
      • Configure ASP.NET Output Caching
      • Using ASP.NET Output Cache with Custom Hooks
  • Client Side Third Party Integrations
    • Migrating AppFabric to NCache
      • AppFabric API vs. NCache API
    • NHibernate
      • NCache as NHibernate Second Level Cache
      • Using NHibernate Query Caching
      • Configuring Database Synchronization with NHibernate
    • Entity Framework Caching Integration
      • NCache as Entity Framework Second Level Cache
      • Entity Framework Caching Config File
    • Entity Framework Core Caching
      • Installing NCache Entity Framework Core Provider
      • Configuring NCache Entity Framework Core Provider
      • Using NCache Entity Framework Core Provider
        • Caching Options for EF Core Provider
        • LINQ APIs for EF Core Provider
        • Cache Only APIs for EF Core Provider
        • Query Deferred APIs for EF Core Provider
      • Logging in NCache Entity Framework Core Provider
    • Memcached
      • NCache Memcached Gateway Approach
      • Memcached Client Plugin for .NET
    • Debug NCache Providers in Visual Studio
    • NCache for Visual Studio Extension

Page Level Grouping for View State

NCache allows performing View State grouping even at page level. To utilize this feature, the following configurations should be made in Web.config file:

Add the property webAppId in <settings> as follows:

<ncContentOptimization>
   <settings webAppId="CustomerOrderApp"
   enableViewstateCaching="true"
   groupedViewStateWithSessions="true"
   viewstateThreshold="12"
   enableTrace="true"
   maxViewStatesPerSession="10">
      <cacheSettings cacheName = "mycache">
         <expiration type="Sliding" duration = "300">
      </cacheSettings>
   </settings>
</ncContentOptimization> 

Configuration Members

Members Description
webAppId Specifies the web application ID where the application is currently running. When webappId is specified, NCache looks up for ViewState.xml file to read configurations. If webAppId is not specified, View States will not be grouped and the default settings from Web.config will be used.

ViewState.xml

ViewState.xml is required for this feature. This file (ViewState.xml) can be placed at NCache installation config directory %NCHOME%\config or in the web application’s bin path.

The web application ID provided in Web.config is matched with web application id in ViewState.xml file. Detailed configurations for each group are then loaded from ViewState.xml.

The configurations provided in Web.config are loaded as default settings. The configurations in this xml file are loaded per group. Here is a sample ViewState.xml file:

<configuration>
  <viewstateConfig>
    <webApp webAppId="CustomerOrderApp">
      <viewstateGroup groupId="Customers" cacheUriMapping="false" enableViewstateCaching="True" viewstateThreshold="12" groupedViewStateWithSessions="false" maxViewStatePerSession="20">
         <cacheSettings cacheName="myCache" connectionRetryInterval="300">
            <expiration type="Sliding" duration="5"/>
         </cacheSettings>
         <pages>
           <page url="…/Customers.aspx"/> <!—Relative url of a page-->
         </pages>
      </viewstateGroup>
    <viewstateGroup groupId="Orders" cacheUriMapping="false" enableViewstateCaching="true" viewstateThreshold="23" groupedViewStateWithSessions="false" maxViewStatePerSession="5" enableMetadataLocking="True" releaseLockInterval="5">
      <cacheSettings cacheName="replicatedCache" connectionRetryInterval="300">
        <expiration type="Sliding" duration="20"/>
      </cacheSettings>
          <pages>
            <page url="…/Orders.aspx"/>
            <page url="…/OrderDetails.aspx"/>
          </pages>
     </viewstateGroup>
</webApp>
  <webApp webAppId="ViewStateApp">
    <viewstateGroup groupId="Group_A" enableViewstateCaching="True" viewstateThreshold="2" groupedViewStateWithSessions="false" maxViewStatePerSession="200">
      <cacheSettings cacheName="cache">
        <expiration type="Sliding" duration="20"/>
      </cacheSettings>
           <pages>
             <page url="…/viewstate.aspx"/>
           </pages>
      </viewstateGroup>
    </webApp>
  </viewstateConfig>
</configuration>

Configuration Members

Members Description
webAppId Used to distinguish multiple web app sections.
GroupId Used to distinguish multiple groups.
page url Relative URL for a page.
Important

Note that all these configuration members are compulsory to be specified.

The following important points should be noted:

  1. The XML file can have multiple web app configurations. In each web app configuration, there can be one or more group configurations.

  2. All the web pages for a certain group are provided in <pages> section and page URL is the relative URL of a page.

  3. If a page configuration is not found in View State configuration file, default settings provided in Web.config will be used.

  4. If any property is missing for any group, default property value provided in Web.config will be used.

  5. Different caches can also be configured for different groups.

Default and Group Setting Usage

If Web.config provides a web app id, NCache will look for ViewState.xml file to read configuration. In this case, default settings will only be used if configuration for a page is not found in ViewState.xml or if some optional property is missing in ViewState.xml.

But if Web.config <settings> does not include webAppId, default settings will be used for all View State caching.

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