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SessionParameter.Evaluate Method

Updates and returns the value of the SessionParameter object.

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

abstract Evaluate : 
        context:HttpContext * 
        control:Control -> Object  
override Evaluate : 
        context:HttpContext * 
        control:Control -> Object


Type: System.Web.HttpContext

The current HttpContext of the request.

Type: System.Web.UI.Control

A Control that is associated with the Web Forms page where the SessionParameter is used.

Return Value

Type: System.Object
An object that represents the updated and current value of the parameter. If the context or the request is a null reference (Nothing in Visual Basic), the Evaluate method returns a null reference (Nothing in Visual Basic).

The SessionParameter object attempts to bind to the value of the session variable every time the Evaluate method is called.

The context parameter is used by the Evaluate method to retrieve the name/value pair that the SessionParameter object binds to. The control parameter is ignored.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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