Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / xsp / System / Web / UI / SessionPageStatePersister.cs / 1 / SessionPageStatePersister.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI { using System.Collections; using System.Collections.Specialized; using System.IO; using System.Text; using System.Web.SessionState; using System.Web.Configuration; using System.Security.Permissions; [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class SessionPageStatePersister : PageStatePersister { private const string _viewStateSessionKey = "__SESSIONVIEWSTATE"; private const string _viewStateQueueKey = "__VIEWSTATEQUEUE"; public SessionPageStatePersister(Page page) : base (page) { HttpSessionState session = null; try { session = page.Session; } catch { // ignore, throw if session is null. } if (session == null) { throw new ArgumentException(SR.GetString(SR.SessionPageStatePersister_SessionMustBeEnabled)); } } public override void Load() { NameValueCollection requestValueCollection = Page.RequestValueCollection; if (requestValueCollection == null) { return; } try { string combinedSerializedStateString = Page.RequestViewStateString; string persistedStateID = null; bool controlStateInSession = false; // SessionState will persist a Pair of, // where if requiresControlStateInSession is true, second will just be the sessionID, as // we will store both control state and view state in session. Otherwise, we store just the // view state in session and the pair will be if (!String.IsNullOrEmpty(combinedSerializedStateString)) { Pair combinedState = (Pair)Util.DeserializeWithAssert(StateFormatter, combinedSerializedStateString); // Check if we are storing control state in session as well if ((bool)combinedState.First) { // So the second is the persistedID persistedStateID = (string)combinedState.Second; controlStateInSession = true; } else { // Second is Pair pair = (Pair)combinedState.Second; persistedStateID = (string)pair.First; ControlState = pair.Second; } } if (persistedStateID != null) { object sessionData = Page.Session[_viewStateSessionKey + persistedStateID]; if (controlStateInSession) { Pair combinedState = sessionData as Pair; if (combinedState != null) { ViewState = combinedState.First; ControlState = combinedState.Second; } } else { ViewState = sessionData; } } } catch (Exception e) { // Setup the formatter for this exception, to make sure this message shows up // in an error page as opposed to the inner-most exception's message. HttpException newException = new HttpException(SR.GetString(SR.Invalid_ControlState), e); newException.SetFormatter(new UseLastUnhandledErrorFormatter(newException)); throw newException; } } /// /// To be supplied. /// public override void Save() { bool requiresControlStateInSession = false; object clientData = null; Triplet vsTrip = ViewState as Triplet; // no session view state to store. if ((ControlState != null) || ((vsTrip == null || vsTrip.Second != null || vsTrip.Third != null) && ViewState != null)) { HttpSessionState session = Page.Session; string sessionViewStateID = Convert.ToString(DateTime.Now.Ticks, 16); object state = null; requiresControlStateInSession = Page.Request.Browser.RequiresControlStateInSession; if (requiresControlStateInSession) { // ClientState will just be sessionID state = new Pair(ViewState, ControlState); clientData = sessionViewStateID; } else { // ClientState will be astate = ViewState; clientData = new Pair(sessionViewStateID, ControlState); } string sessionKey = _viewStateSessionKey + sessionViewStateID; session[sessionKey] = state; Queue queue = session[_viewStateQueueKey] as Queue; if (queue == null) { queue = new Queue(); session[_viewStateQueueKey] = queue; } queue.Enqueue(sessionKey); SessionPageStateSection cfg = RuntimeConfig.GetConfig(Page.Request.Context).SessionPageState; int queueCount = queue.Count; if (cfg != null && queueCount > cfg.HistorySize || cfg == null && queueCount > SessionPageStateSection.DefaultHistorySize) { string oldSessionKey = (string)queue.Dequeue(); session.Remove(oldSessionKey); } } if (clientData != null) { Page.ClientState = Util.SerializeWithAssert(StateFormatter, new Pair(requiresControlStateInSession, clientData)); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI { using System.Collections; using System.Collections.Specialized; using System.IO; using System.Text; using System.Web.SessionState; using System.Web.Configuration; using System.Security.Permissions; [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class SessionPageStatePersister : PageStatePersister { private const string _viewStateSessionKey = "__SESSIONVIEWSTATE"; private const string _viewStateQueueKey = "__VIEWSTATEQUEUE"; public SessionPageStatePersister(Page page) : base (page) { HttpSessionState session = null; try { session = page.Session; } catch { // ignore, throw if session is null. } if (session == null) { throw new ArgumentException(SR.GetString(SR.SessionPageStatePersister_SessionMustBeEnabled)); } } public override void Load() { NameValueCollection requestValueCollection = Page.RequestValueCollection; if (requestValueCollection == null) { return; } try { string combinedSerializedStateString = Page.RequestViewStateString; string persistedStateID = null; bool controlStateInSession = false; // SessionState will persist a Pair of, // where if requiresControlStateInSession is true, second will just be the sessionID, as // we will store both control state and view state in session. Otherwise, we store just the // view state in session and the pair will be if (!String.IsNullOrEmpty(combinedSerializedStateString)) { Pair combinedState = (Pair)Util.DeserializeWithAssert(StateFormatter, combinedSerializedStateString); // Check if we are storing control state in session as well if ((bool)combinedState.First) { // So the second is the persistedID persistedStateID = (string)combinedState.Second; controlStateInSession = true; } else { // Second is Pair pair = (Pair)combinedState.Second; persistedStateID = (string)pair.First; ControlState = pair.Second; } } if (persistedStateID != null) { object sessionData = Page.Session[_viewStateSessionKey + persistedStateID]; if (controlStateInSession) { Pair combinedState = sessionData as Pair; if (combinedState != null) { ViewState = combinedState.First; ControlState = combinedState.Second; } } else { ViewState = sessionData; } } } catch (Exception e) { // Setup the formatter for this exception, to make sure this message shows up // in an error page as opposed to the inner-most exception's message. HttpException newException = new HttpException(SR.GetString(SR.Invalid_ControlState), e); newException.SetFormatter(new UseLastUnhandledErrorFormatter(newException)); throw newException; } } /// /// To be supplied. /// public override void Save() { bool requiresControlStateInSession = false; object clientData = null; Triplet vsTrip = ViewState as Triplet; // no session view state to store. if ((ControlState != null) || ((vsTrip == null || vsTrip.Second != null || vsTrip.Third != null) && ViewState != null)) { HttpSessionState session = Page.Session; string sessionViewStateID = Convert.ToString(DateTime.Now.Ticks, 16); object state = null; requiresControlStateInSession = Page.Request.Browser.RequiresControlStateInSession; if (requiresControlStateInSession) { // ClientState will just be sessionID state = new Pair(ViewState, ControlState); clientData = sessionViewStateID; } else { // ClientState will be astate = ViewState; clientData = new Pair(sessionViewStateID, ControlState); } string sessionKey = _viewStateSessionKey + sessionViewStateID; session[sessionKey] = state; Queue queue = session[_viewStateQueueKey] as Queue; if (queue == null) { queue = new Queue(); session[_viewStateQueueKey] = queue; } queue.Enqueue(sessionKey); SessionPageStateSection cfg = RuntimeConfig.GetConfig(Page.Request.Context).SessionPageState; int queueCount = queue.Count; if (cfg != null && queueCount > cfg.HistorySize || cfg == null && queueCount > SessionPageStateSection.DefaultHistorySize) { string oldSessionKey = (string)queue.Dequeue(); session.Remove(oldSessionKey); } } if (clientData != null) { Page.ClientState = Util.SerializeWithAssert(StateFormatter, new Pair(requiresControlStateInSession, clientData)); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SqlInfoMessageEvent.cs
- HtmlElementErrorEventArgs.cs
- X509ClientCertificateCredentialsElement.cs
- BackoffTimeoutHelper.cs
- ServicePoint.cs
- CustomErrorsSectionWrapper.cs
- CodeIdentifier.cs
- Inline.cs
- controlskin.cs
- ToolStripRenderEventArgs.cs
- HuffmanTree.cs
- ButtonColumn.cs
- DataStreamFromComStream.cs
- PhonemeEventArgs.cs
- LingerOption.cs
- TextTreeObjectNode.cs
- BehaviorEditorPart.cs
- LocatorGroup.cs
- MenuCommand.cs
- SystemIPGlobalProperties.cs
- ScrollViewerAutomationPeer.cs
- CheckBoxStandardAdapter.cs
- HostingEnvironmentSection.cs
- IntSecurity.cs
- SelectorItemAutomationPeer.cs
- RSAPKCS1KeyExchangeFormatter.cs
- FixedElement.cs
- ItemChangedEventArgs.cs
- EdmComplexPropertyAttribute.cs
- DataTableClearEvent.cs
- CrossAppDomainChannel.cs
- SchemaImporterExtensionsSection.cs
- CodeTypeDeclaration.cs
- DynamicValidatorEventArgs.cs
- PageCatalogPart.cs
- X509Extension.cs
- ConfigurationManagerHelper.cs
- HttpChannelBindingToken.cs
- RegisteredScript.cs
- SqlRewriteScalarSubqueries.cs
- RowUpdatedEventArgs.cs
- SkewTransform.cs
- CompiledXpathExpr.cs
- StreamBodyWriter.cs
- PanelStyle.cs
- _LocalDataStoreMgr.cs
- RepeatButton.cs
- HttpAsyncResult.cs
- mediaeventshelper.cs
- IntegerValidator.cs
- InternalConfigRoot.cs
- PointConverter.cs
- RowParagraph.cs
- LazyTextWriterCreator.cs
- LiteralControl.cs
- CursorInteropHelper.cs
- NativeObjectSecurity.cs
- Monitor.cs
- TextChange.cs
- OdbcConnectionPoolProviderInfo.cs
- DataKeyArray.cs
- SectionInput.cs
- Utils.cs
- BaseResourcesBuildProvider.cs
- ReadOnlyObservableCollection.cs
- FileChangesMonitor.cs
- FrugalList.cs
- TransformerConfigurationWizardBase.cs
- PenThreadPool.cs
- WebPartDisplayModeCollection.cs
- WpfXamlMember.cs
- CaretElement.cs
- Pool.cs
- RemotingConfigParser.cs
- SiteMapNodeItem.cs
- DataGridRowClipboardEventArgs.cs
- ProcessHostMapPath.cs
- DrawingGroupDrawingContext.cs
- ListBox.cs
- KeyManager.cs
- OleDbMetaDataFactory.cs
- ModelUIElement3D.cs
- DTCTransactionManager.cs
- ServiceTimeoutsElement.cs
- JoinTreeNode.cs
- SqlWebEventProvider.cs
- DefinitionBase.cs
- MarkerProperties.cs
- FlowLayout.cs
- DocumentApplicationDocumentViewer.cs
- PeerResolverSettings.cs
- HitTestParameters.cs
- ToolStripItemClickedEventArgs.cs
- SessionStateItemCollection.cs
- GridViewRowPresenterBase.cs
- SqlConnectionManager.cs
- DataSourceXmlAttributeAttribute.cs
- Debug.cs
- TrustSection.cs
- XDRSchema.cs