Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / SessionPageStatePersister.cs / 1305376 / 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; 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; 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
- HttpClientCertificate.cs
- MemoryResponseElement.cs
- GroupStyle.cs
- FontNamesConverter.cs
- __FastResourceComparer.cs
- ModuleConfigurationInfo.cs
- SortKey.cs
- ChangeToolStripParentVerb.cs
- TrackingMemoryStreamFactory.cs
- Duration.cs
- BitmapImage.cs
- DesignerHost.cs
- ListViewItem.cs
- ExtensionSimplifierMarkupObject.cs
- TextAnchor.cs
- RowType.cs
- LinkConverter.cs
- Range.cs
- SamlDoNotCacheCondition.cs
- ObjectResult.cs
- ExpressionBuilder.cs
- ComponentSerializationService.cs
- DataBoundControl.cs
- PasswordTextNavigator.cs
- StoreItemCollection.cs
- SourceFilter.cs
- ProfileManager.cs
- Registry.cs
- ListBox.cs
- SqlConnectionHelper.cs
- AudioBase.cs
- VisualProxy.cs
- BamlTreeUpdater.cs
- SynchronizedInputProviderWrapper.cs
- CqlParser.cs
- X509Certificate2.cs
- EventLogReader.cs
- MdImport.cs
- LineInfo.cs
- ApplicationId.cs
- controlskin.cs
- DbParameterCollection.cs
- LambdaCompiler.Binary.cs
- QuaternionRotation3D.cs
- SqlClientFactory.cs
- XmlCharType.cs
- UserPersonalizationStateInfo.cs
- DataControlFieldHeaderCell.cs
- ColumnMapTranslator.cs
- RegexCapture.cs
- ObjectDataSourceDesigner.cs
- Number.cs
- DataGridViewTopRowAccessibleObject.cs
- HtmlPanelAdapter.cs
- AndCondition.cs
- XmlQueryTypeFactory.cs
- _LocalDataStoreMgr.cs
- SoapParser.cs
- StreamReader.cs
- DelayedRegex.cs
- ExceptionUtil.cs
- EdmEntityTypeAttribute.cs
- GenericWebPart.cs
- DataTrigger.cs
- OnOperation.cs
- FormsAuthenticationTicket.cs
- IPGlobalProperties.cs
- WindowShowOrOpenTracker.cs
- DataControlFieldHeaderCell.cs
- _ProxyChain.cs
- TcpChannelListener.cs
- DesignTimeValidationFeature.cs
- DataTableMapping.cs
- CodeSubDirectoriesCollection.cs
- Crypto.cs
- WebPartVerb.cs
- RectangleGeometry.cs
- LessThan.cs
- UMPAttributes.cs
- Gdiplus.cs
- GridPattern.cs
- CompleteWizardStep.cs
- TouchFrameEventArgs.cs
- OutputCacheSettingsSection.cs
- DesignerProperties.cs
- StringBuilder.cs
- GeneralTransform3DCollection.cs
- Maps.cs
- SmiEventSink_DeferedProcessing.cs
- AnnotationObservableCollection.cs
- _FtpDataStream.cs
- GenericTypeParameterBuilder.cs
- PrintingPermissionAttribute.cs
- CustomErrorCollection.cs
- ClassData.cs
- ModelTreeEnumerator.cs
- StrongNameSignatureInformation.cs
- EntitySetDataBindingList.cs
- ConstNode.cs
- SmtpSection.cs