SessionPageStatePersister Class
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SessionPageStatePersister Class


Stores ASP.NET page view state on the Web server.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)


public class SessionPageStatePersister : PageStatePersister


Initializes a new instance of the SessionPageStatePersister class.


Gets or sets an object that represents the data that controls contained by the current Page object use to persist across HTTP requests to the Web server. (Inherited from PageStatePersister.)


Gets or sets the Page object that the view state persistence mechanism is created for.(Inherited from PageStatePersister.)


Gets an IStateFormatter object that is used to serialize and deserialize the state information contained in the ViewState and ControlState properties during calls to the Save and Load methods.(Inherited from PageStatePersister.)


Gets or sets an object that represents the data that controls contained by the current Page object use to persist across HTTP requests to the Web server. (Inherited from PageStatePersister.)


Determines whether the specified object is equal to the current object.(Inherited from Object.)


Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)


Serves as the default hash function. (Inherited from Object.)


Gets the Type of the current instance.(Inherited from Object.)


Deserializes and loads persisted state from the server-side session object when a Page object initializes its control hierarchy.(Overrides PageStatePersister.Load().)


Creates a shallow copy of the current Object.(Inherited from Object.)


Serializes any object state contained in the ViewState or the ControlState property and writes the state to the session object.(Overrides PageStatePersister.Save().)


Returns a string that represents the current object.(Inherited from Object.)

ASP.NET pages can store Page state information between the inherently stateless HTTP request and response required to process and serve any Web page. This state is called "view state."

The default ASP.NET persistence mechanism is to store view state on the client using the HiddenFieldPageStatePersister class. Storing view state and data with each HTTP request and response performs well in general and is important in large Web farm scenarios because it does not matter which Web server services the request: the page state is available in the current context for the server to accurately render the page.

In scenarios where pages are served to small devices that have limited client-side resources or use a markup language that does not support a hidden field element, it is required to store view state on the server. Several ASP.NET device page adapters override the GetStatePersister method to return a SessionPageStatePersister object that stores page state on the server in the session object associated with the client.

The following code example demonstrates how you can write a PageAdapter class to return an instance of the SessionPageStatePersister class instead of the default HiddenFieldPageStatePersister class to save view state to the server-side session object.

namespace Samples.AspNet.CS {

    using System.Web.UI;

    public class MyPageAdapter : System.Web.UI.Adapters.PageAdapter {

        public override PageStatePersister GetStatePersister() {
            return new SessionPageStatePersister(Page);

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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