Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Configuration / System / Configuration / updateconfighost.cs / 1305376 / updateconfighost.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Configuration { using System.Collections.Specialized; using System.Configuration.Internal; using System.IO; // // Configuration host that intercepts calls to filename functions // to support SaveAs to an alternate file stream. // internal class UpdateConfigHost : DelegatingConfigHost { private HybridDictionary _streams; // oldStreamname -> StreamUpdate internal UpdateConfigHost(IInternalConfigHost host) { // Delegate to the host provided. Host = host; } // Add a stream to the list of streams to intercept. // // Parameters: // alwaysIntercept - If true, then don't check whether the old stream and the new stream are the same. // SaveAs() will set this to true if oldStreamname is actually referring to a stream // on a remote machine. internal void AddStreamname(string oldStreamname, string newStreamname, bool alwaysIntercept) { // Debug.Assert(!String.IsNullOrEmpty(oldStreamname)); if (String.IsNullOrEmpty(oldStreamname)) { return; } if (!alwaysIntercept && StringUtil.EqualsIgnoreCase(oldStreamname, newStreamname)) { return; } if (_streams == null) { _streams = new HybridDictionary(true); } _streams[oldStreamname] = new StreamUpdate(newStreamname); } // Get the new stream name for a stream if a new name exists, otherwise // return the original stream name. internal string GetNewStreamname(string oldStreamname) { StreamUpdate streamUpdate = GetStreamUpdate(oldStreamname, false); if (streamUpdate != null) { return streamUpdate.NewStreamname; } return oldStreamname; } // // Get the StreamUpdate for a stream. // If alwaysIntercept is true, then the StreamUpdate is // always returned if it exists. // If alwaysIntercept is false, then only return the StreamUpdate // if the new stream has been successfully written to. // private StreamUpdate GetStreamUpdate(string oldStreamname, bool alwaysIntercept) { if (_streams == null) return null; StreamUpdate streamUpdate = (StreamUpdate) _streams[oldStreamname]; if (streamUpdate != null && !alwaysIntercept && !streamUpdate.WriteCompleted) { streamUpdate = null; } return streamUpdate; } public override object GetStreamVersion(string streamName) { StreamUpdate streamUpdate = GetStreamUpdate(streamName, false); if (streamUpdate != null) { return InternalConfigHost.StaticGetStreamVersion(streamUpdate.NewStreamname); } else { return Host.GetStreamVersion(streamName); } } public override Stream OpenStreamForRead(string streamName) { StreamUpdate streamUpdate = GetStreamUpdate(streamName, false); if (streamUpdate != null) { return InternalConfigHost.StaticOpenStreamForRead(streamUpdate.NewStreamname); } else { return Host.OpenStreamForRead(streamName); } } public override Stream OpenStreamForWrite(string streamName, string templateStreamName, ref object writeContext) { // Always attempt to write to the new stream name if it exists. StreamUpdate streamUpdate = GetStreamUpdate(streamName, true); if (streamUpdate != null) { return InternalConfigHost.StaticOpenStreamForWrite(streamUpdate.NewStreamname, templateStreamName, ref writeContext, false); } else { return Host.OpenStreamForWrite(streamName, templateStreamName, ref writeContext); } } public override void WriteCompleted(string streamName, bool success, object writeContext) { StreamUpdate streamUpdate = GetStreamUpdate(streamName, true); if (streamUpdate != null) { InternalConfigHost.StaticWriteCompleted(streamUpdate.NewStreamname, success, writeContext, false); // // Mark the write as having successfully completed, so that subsequent calls // to Read() will use the new stream name. // if (success) { streamUpdate.WriteCompleted = true; } } else { Host.WriteCompleted(streamName, success, writeContext); } } public override bool IsConfigRecordRequired(string configPath) { return true; } public override void DeleteStream(string streamName) { StreamUpdate streamUpdate = GetStreamUpdate(streamName, false); if (streamUpdate != null) { InternalConfigHost.StaticDeleteStream(streamUpdate.NewStreamname); } else { Host.DeleteStream(streamName); } } public override bool IsFile(string streamName) { StreamUpdate streamUpdate = GetStreamUpdate(streamName, false); if (streamUpdate != null) { return InternalConfigHost.StaticIsFile(streamUpdate.NewStreamname); } else { return Host.IsFile(streamName); } } } } // 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
- XmlMemberMapping.cs
- IdnMapping.cs
- DelimitedListTraceListener.cs
- CodeNamespaceImport.cs
- WindowsSysHeader.cs
- NativeCppClassAttribute.cs
- ProcessThread.cs
- COSERVERINFO.cs
- SimpleMailWebEventProvider.cs
- SessionPageStatePersister.cs
- SemanticBasicElement.cs
- ToolStrip.cs
- XmlSchemaNotation.cs
- TranslateTransform.cs
- PerformanceCounterLib.cs
- ContentOperations.cs
- BackStopAuthenticationModule.cs
- ConnectionPoint.cs
- UnknownWrapper.cs
- RedistVersionInfo.cs
- StrokeNode.cs
- ButtonBase.cs
- CacheMemory.cs
- DetailsViewDeleteEventArgs.cs
- SortedList.cs
- VerificationException.cs
- DesignerCapabilities.cs
- MarshalDirectiveException.cs
- _NegoState.cs
- XPathNavigator.cs
- ImageAnimator.cs
- CallContext.cs
- Typography.cs
- EntityFunctions.cs
- DataListCommandEventArgs.cs
- FontUnitConverter.cs
- SystemIcmpV6Statistics.cs
- UpdateCommand.cs
- DataServiceRequest.cs
- ParsedAttributeCollection.cs
- IImplicitResourceProvider.cs
- Vars.cs
- IndependentAnimationStorage.cs
- RequestUriProcessor.cs
- PowerStatus.cs
- ObservableDictionary.cs
- TemplateControlParser.cs
- BamlBinaryWriter.cs
- ViewManager.cs
- SerializationException.cs
- ComplexObject.cs
- PeerApplicationLaunchInfo.cs
- TransactionFormatter.cs
- ContentElementAutomationPeer.cs
- TreeBuilder.cs
- DiscoveryClientDocuments.cs
- Scripts.cs
- ColumnBinding.cs
- Effect.cs
- Tokenizer.cs
- AtomServiceDocumentSerializer.cs
- BindingValueChangedEventArgs.cs
- BinaryMethodMessage.cs
- SqlTypeSystemProvider.cs
- FileEnumerator.cs
- HttpCookiesSection.cs
- IconEditor.cs
- StylusPointPropertyInfo.cs
- GPPOINT.cs
- CharacterShapingProperties.cs
- BitmapEffectInput.cs
- DPCustomTypeDescriptor.cs
- CapabilitiesSection.cs
- PackageRelationshipSelector.cs
- SqlDependencyListener.cs
- MenuAdapter.cs
- XmlArrayAttribute.cs
- ListBoxAutomationPeer.cs
- FixedSOMImage.cs
- WebServiceEnumData.cs
- SqlConnectionPoolGroupProviderInfo.cs
- DifferencingCollection.cs
- TextParaLineResult.cs
- ExecutorLocksHeldException.cs
- Attribute.cs
- TraceSwitch.cs
- XmlSchemaException.cs
- TableLayoutPanel.cs
- DataControlFieldsEditor.cs
- PrimarySelectionAdorner.cs
- MergeFailedEvent.cs
- ImageButton.cs
- ADConnectionHelper.cs
- ControlPropertyNameConverter.cs
- PeerCollaboration.cs
- OdbcConnectionPoolProviderInfo.cs
- OracleConnectionString.cs
- EntityDataSourceSelectedEventArgs.cs
- SqlComparer.cs
- DataGridRowHeader.cs