本文整理汇总了VB.NET中System.Web.UI.IStateFormatter接口的典型用法代码示例。如果您正苦于以下问题:VB.NET IStateFormatter接口的具体用法?VB.NET IStateFormatter怎么用?VB.NET IStateFormatter使用的例子?那么, 这里精选的接口代码示例或许可以为您提供帮助。
在下文中一共展示了IStateFormatter接口的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: New
' 导入命名空间
Imports System.IO
Imports System.Security.Permissions
Imports System.Web
Imports System.Web.UI
Namespace Samples.AspNet.VB
' The StreamPageStatePersister is an example view state
' persistence mechanism that persists view and control
' state on the Web server.
'
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public Class StreamPageStatePersister
Inherits PageStatePersister
Public Sub New(ByVal page As Page)
MyBase.New(page)
End Sub
'
' Load ViewState and ControlState.
'
Public Overrides Sub Load()
Dim stateStream As Stream
stateStream = GetSecureStream()
' Read the state string, using the StateFormatter.
Dim reader As New StreamReader(stateStream)
Dim serializedStatePair As String
serializedStatePair = reader.ReadToEnd
Dim statePair As Pair
Dim formatter As IStateFormatter
formatter = Me.StateFormatter
' Deserilize returns the Pair object that is serialized in
' the Save method.
statePair = CType(formatter.Deserialize(serializedStatePair), Pair)
ViewState = statePair.First
ControlState = statePair.Second
reader.Close()
stateStream.Close()
End Sub
'
' Persist any ViewState and ControlState.
'
Public Overrides Sub Save()
If Not (ViewState Is Nothing) OrElse Not (ControlState Is Nothing) Then
If Not (Page.Session Is Nothing) Then
Dim stateStream As Stream
stateStream = GetSecureStream()
' Write a state string, using the StateFormatter.
Dim writer As New StreamWriter(stateStream)
Dim formatter As IStateFormatter
formatter = Me.StateFormatter
Dim statePair As New Pair(ViewState, ControlState)
Dim serializedState As String
serializedState = formatter.Serialize(statePair)
writer.Write(serializedState)
writer.Close()
stateStream.Close()
Else
Throw New InvalidOperationException("Session needed for StreamPageStatePersister.")
End If
End If
End Sub
' Return a secure Stream for your environment.
Private Function GetSecureStream() As Stream
' You must provide the implementation to build
' a secure Stream for your environment.
Return Nothing
End Function
End Class
End Namespace