UserControl.SaveViewState Method ()
.NET Framework (current version)
Saves any user control view-state changes that have occurred since the last page postback.
Assembly: System.Web (in System.Web.dll)
Return Value
Type: System.ObjectReturns the user control's current view state. If there is no view state associated with the control, it returns null.
In general, you do not need to call this method. However, if you store custom information in view state, you can override this method to do so.
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
.NET Framework
Available since 1.1
Available since 1.1
Show: