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)
'Declaration <BrowsableAttribute(False)> _ Protected Overridable ReadOnly Property ViewState As StateBag 'Usage Dim value As StateBag value = Me.ViewState
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 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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.