Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / 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
- DataGridViewCellStateChangedEventArgs.cs
- RenderData.cs
- TreeNodeStyle.cs
- TypeDescriptor.cs
- TargetControlTypeCache.cs
- XslNumber.cs
- TextTreeFixupNode.cs
- PropertyStore.cs
- RenderDataDrawingContext.cs
- BasicExpressionVisitor.cs
- AccessText.cs
- MailSettingsSection.cs
- MailMessage.cs
- ArrayList.cs
- XPathDocument.cs
- BooleanToSelectiveScrollingOrientationConverter.cs
- ITextView.cs
- FormViewDeleteEventArgs.cs
- SafeWaitHandle.cs
- TailCallAnalyzer.cs
- TraceSource.cs
- DeadCharTextComposition.cs
- RestClientProxyHandler.cs
- Wizard.cs
- MessageSmuggler.cs
- Comparer.cs
- FunctionMappingTranslator.cs
- ImageAttributes.cs
- SendMailErrorEventArgs.cs
- UserControlParser.cs
- _CommandStream.cs
- CodeTypeDeclaration.cs
- SpellerStatusTable.cs
- BitVector32.cs
- WindowsUserNameSecurityTokenAuthenticator.cs
- DistinctQueryOperator.cs
- ResourceContainer.cs
- Point4DConverter.cs
- GuidelineSet.cs
- CodeDOMUtility.cs
- ContractBase.cs
- Events.cs
- MDIClient.cs
- RuntimeArgumentHandle.cs
- AddDataControlFieldDialog.cs
- MessageCredentialType.cs
- DoubleCollection.cs
- ExtractedStateEntry.cs
- CompositeFontParser.cs
- EpmContentSerializerBase.cs
- ModuleConfigurationInfo.cs
- HighContrastHelper.cs
- X509RawDataKeyIdentifierClause.cs
- TimeoutValidationAttribute.cs
- WindowsIdentity.cs
- FontSource.cs
- ToolStripDropDownItem.cs
- Drawing.cs
- NotifyCollectionChangedEventArgs.cs
- TitleStyle.cs
- CommandField.cs
- SoapReflectionImporter.cs
- AccessViolationException.cs
- Margins.cs
- OdbcFactory.cs
- HwndTarget.cs
- ComponentDispatcherThread.cs
- PeerChannelFactory.cs
- DockPattern.cs
- Bidi.cs
- GetKeyedHashRequest.cs
- CompositeDataBoundControl.cs
- DependencyPropertyKind.cs
- CacheAxisQuery.cs
- Viewport2DVisual3D.cs
- Crypto.cs
- GestureRecognizer.cs
- ContextDataSourceView.cs
- TextEditorContextMenu.cs
- BookmarkUndoUnit.cs
- HttpFileCollection.cs
- XComponentModel.cs
- LinkedDataMemberFieldEditor.cs
- MatchingStyle.cs
- ProcessModule.cs
- SchemaContext.cs
- HostExecutionContextManager.cs
- HttpWebResponse.cs
- RefType.cs
- Animatable.cs
- XhtmlBasicListAdapter.cs
- DispatcherHooks.cs
- FileUtil.cs
- ApplicationSettingsBase.cs
- CategoryAttribute.cs
- DataPointer.cs
- RelationshipFixer.cs
- XamlStyleSerializer.cs
- StylusPointPropertyUnit.cs
- MimeTypePropertyAttribute.cs