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
- BaseHashHelper.cs
- BooleanKeyFrameCollection.cs
- ListCollectionView.cs
- NamespaceInfo.cs
- ModuleElement.cs
- ProfessionalColorTable.cs
- MessageQueuePermissionAttribute.cs
- ObjectQuery_EntitySqlExtensions.cs
- BamlResourceDeserializer.cs
- DataGridCaption.cs
- ISAPIApplicationHost.cs
- BufferModesCollection.cs
- SqlTriggerAttribute.cs
- SoapExtensionImporter.cs
- SQLInt16.cs
- ProtectedConfigurationProviderCollection.cs
- Effect.cs
- MembershipUser.cs
- PathSegmentCollection.cs
- TcpAppDomainProtocolHandler.cs
- XmlElementAttribute.cs
- CacheModeConverter.cs
- ReferencedType.cs
- PageCopyCount.cs
- WebService.cs
- SevenBitStream.cs
- Lookup.cs
- HtmlWindow.cs
- StaticFileHandler.cs
- GifBitmapEncoder.cs
- FixedDSBuilder.cs
- CodeStatementCollection.cs
- PagesSection.cs
- ProcessInfo.cs
- LongAverageAggregationOperator.cs
- StorageInfo.cs
- RelatedPropertyManager.cs
- XmlEventCache.cs
- DataSourceControlBuilder.cs
- UrlMapping.cs
- Maps.cs
- TemplateParser.cs
- NavigationExpr.cs
- XmlAnyElementAttributes.cs
- CaseExpr.cs
- WindowsEditBox.cs
- WindowsFormsSectionHandler.cs
- CharacterShapingProperties.cs
- GenericArgumentsUpdater.cs
- DataServiceHostWrapper.cs
- ParameterToken.cs
- Rect.cs
- DrawingVisualDrawingContext.cs
- Effect.cs
- ScrollPattern.cs
- _LazyAsyncResult.cs
- FatalException.cs
- EntityClientCacheKey.cs
- DetailsViewUpdateEventArgs.cs
- CDSsyncETWBCLProvider.cs
- WebEventTraceProvider.cs
- RuntimeWrappedException.cs
- KeySpline.cs
- TemplateNameScope.cs
- InternalBase.cs
- WindowsFormsSynchronizationContext.cs
- ParentQuery.cs
- CultureTableRecord.cs
- EditorResources.cs
- LeaseManager.cs
- HtmlUtf8RawTextWriter.cs
- SamlAuthenticationStatement.cs
- Parameter.cs
- BidPrivateBase.cs
- BlockCollection.cs
- UnauthorizedAccessException.cs
- ToolTipAutomationPeer.cs
- DbParameterHelper.cs
- PanelStyle.cs
- KeyValuePair.cs
- RemoteWebConfigurationHost.cs
- ExpressionBuilder.cs
- WithStatement.cs
- SqlDuplicator.cs
- TypeBuilder.cs
- EditorAttribute.cs
- InstanceNameConverter.cs
- InputMethodStateTypeInfo.cs
- StrokeDescriptor.cs
- GridViewAutomationPeer.cs
- ControlBuilderAttribute.cs
- CodeChecksumPragma.cs
- ControlBuilderAttribute.cs
- CommandEventArgs.cs
- SingleStorage.cs
- MarkupCompilePass1.cs
- XmlNullResolver.cs
- PrivateFontCollection.cs
- XmlSchemaFacet.cs
- AccessDataSource.cs