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UserControl.SaveViewState Method
Visual Studio 2008
Saves any user control view-state changes that have occurred since the last page postback.
Assembly: System.Web (in System.Web.dll)
'Declaration Protected Overrides Function SaveViewState As Object 'Usage Dim returnValue As Object returnValue = Me.SaveViewState()
Return Value
Type: System.ObjectReturns the user control's current view state. If there is no view state associated with the control, it returns Nothing.
The following example demonstrates a user control that manages its view state using the LoadViewState and SaveViewState methods.
Public Property UserText() As String
Get
Return CStr(ViewState("usertext"))
End Get
Set(ByVal value As String)
ViewState("usertext") = value
End Set
End Property
Public Property PasswordText() As String
Get
Return CStr(ViewState("passwordtext"))
End Get
Set(ByVal value As String)
ViewState("passwordtext") = value
End Set
End Property
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Sub LoadViewState(ByVal savedState As Object)
Dim totalState As Object() = Nothing
If Not (savedState Is Nothing) Then
totalState = CType(savedState, Object())
If totalState.Length <> 3 Then
' Throw an appropriate exception.
End If
' Load base state.
MyBase.LoadViewState(totalState(0))
' Load extra information specific to this control.
If Not (totalState Is Nothing) AndAlso Not (totalState(1) Is Nothing) AndAlso Not (totalState(2) Is Nothing) Then
UserText = CStr(totalState(1))
PasswordText = CStr(totalState(2))
End If
End If
End Sub
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Function SaveViewState() As Object
Dim baseState As Object = MyBase.SaveViewState()
Dim totalState(2) As Object
totalState(0) = baseState
totalState(1) = user.Text
totalState(2) = password.Text
Return totalState
End Function
End Class
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.
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