Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / DEVDIV / depot / DevDiv / releases / whidbey / QFE / ndp / fx / src / xsp / System / Web / UI / SessionPageStatePersister.cs / 2 / 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. //------------------------------------------------------------------------------ // // 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- MeshGeometry3D.cs
- OracleNumber.cs
- Monitor.cs
- JsonXmlDataContract.cs
- FunctionDescription.cs
- StringDictionary.cs
- DocumentXPathNavigator.cs
- HtmlInputFile.cs
- CollectionBase.cs
- TableLayoutColumnStyleCollection.cs
- BaseDataListPage.cs
- rsa.cs
- NominalTypeEliminator.cs
- SecurityIdentifierElement.cs
- LocalValueEnumerator.cs
- KoreanLunisolarCalendar.cs
- PropertyKey.cs
- MulticastOption.cs
- LogStore.cs
- PropertyManager.cs
- HelpKeywordAttribute.cs
- ProfileEventArgs.cs
- UnauthorizedAccessException.cs
- basemetadatamappingvisitor.cs
- Permission.cs
- PropertyIdentifier.cs
- InfoCardRSAPKCS1KeyExchangeDeformatter.cs
- ClientUIRequest.cs
- ZipIOLocalFileBlock.cs
- Trace.cs
- VsPropertyGrid.cs
- PriorityQueue.cs
- CFGGrammar.cs
- TreeNodeStyleCollection.cs
- ColorTransformHelper.cs
- ClientSideQueueItem.cs
- WebPartDeleteVerb.cs
- StateWorkerRequest.cs
- CompilerInfo.cs
- DefaultPropertiesToSend.cs
- StatusInfoItem.cs
- XmlNullResolver.cs
- HttpValueCollection.cs
- ApplicationGesture.cs
- HttpCapabilitiesSectionHandler.cs
- WindowsRichEditRange.cs
- ImageCodecInfoPrivate.cs
- Math.cs
- PackWebResponse.cs
- CaseExpr.cs
- PrintDialog.cs
- FilteredAttributeCollection.cs
- BufferBuilder.cs
- OleDbRowUpdatedEvent.cs
- DecimalAnimationBase.cs
- ModuleConfigurationInfo.cs
- ComPlusInstanceProvider.cs
- RelatedCurrencyManager.cs
- ThreadAttributes.cs
- AddInEnvironment.cs
- RadioButtonRenderer.cs
- ItemCheckEvent.cs
- CodeRemoveEventStatement.cs
- SafeRightsManagementQueryHandle.cs
- MsmqInputChannelListenerBase.cs
- COAUTHINFO.cs
- RandomNumberGenerator.cs
- XmlMemberMapping.cs
- GridViewRow.cs
- ReflectionServiceProvider.cs
- InfoCardXmlSerializer.cs
- ToolstripProfessionalRenderer.cs
- BrowserTree.cs
- NavigationFailedEventArgs.cs
- SpanIndex.cs
- InstanceStore.cs
- AsyncCallback.cs
- X509CertificateValidator.cs
- EmptyQuery.cs
- ToolStripSettings.cs
- ZipPackagePart.cs
- XamlFigureLengthSerializer.cs
- TextCharacters.cs
- ConfigurationStrings.cs
- XmlBinaryWriter.cs
- XmlSchemaAny.cs
- WebPartCloseVerb.cs
- TimersDescriptionAttribute.cs
- MethodAccessException.cs
- ProxyFragment.cs
- EraserBehavior.cs
- SqlFunctionAttribute.cs
- OleDbDataAdapter.cs
- InfoCardAsymmetricCrypto.cs
- UnhandledExceptionEventArgs.cs
- OrderedDictionary.cs
- RolePrincipal.cs
- BroadcastEventHelper.cs
- DetailsViewRow.cs
- SqlExpressionNullability.cs