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Parameter.ViewState Property

Gets a dictionary of state information that allows you to save and restore the view state of a Parameter object across multiple requests for the same page.

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

'Declaration
<BrowsableAttribute(False)> _
Protected ReadOnly Property ViewState As StateBag

Property Value

Type: System.Web.UI.StateBag
An instance of StateBag that contains the Parameter object's view-state information.

A parameter's view state is the accumulation of all its property values. To preserve these values across HTTP requests, ASP.NET server controls use this property, which is an instance of the StateBag class, to store the property values. The values are then passed as a variable to an HTML hidden input element when subsequent requests are processed. View state is enabled for all server controls by default.

For more information about dictionaries and how to use them, see Collections and Data Structures.

The following code example demonstrates how to use the view-state object to store parameter object state in a class that extends the Parameter class. This code example is part of a larger example provided for the Parameter class overview.


' The DataValue can be any arbitrary object and is stored in ViewState.
Public Property DataValue() As Object
   Get
      Return ViewState("Value")
   End Get
   Set
      ViewState("Value") = value
   End Set
End Property


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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