Gets a dictionary of state information that allows you to save and restore the view state of a server control across multiple requests for the same page.
Assembly: System.Web (in System.Web.dll)
A server control's view state is the accumulation of all its property values. In order 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. For more information about saving server control view state, see ASP.NET State Management Overview.
View state is enabled for all server controls by default, but there are circumstances in which you will want to disable it. For more information, see ASP.NET Performance Overview.
For information about dictionaries and how to use them, see Collections and Data Structures.
The following example demonstrates implementing a Text property that stores and retrieves its value from its control's property.
' Add property values to view state with set; ' retrieve them from view state with get. Public Property [Text]() As String Get Dim o As Object = ViewState("Text") If (IsNothing(o)) Then Return String.Empty Else Return CStr(o) End If End Get Set(ByVal value As String) ViewState("Text") = value End Set End Property
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.