Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Data / XmlDataCollection.cs / 1305600 / XmlDataCollection.cs
//---------------------------------------------------------------------------- // //// Copyright (C) 2003 by Microsoft Corporation. All rights reserved. // // // // Description: Data collection produced by an XmlDataProvider // // Specs: http://avalon/connecteddata/M5%20Specs/IDataCollection.mht // //--------------------------------------------------------------------------- using System.Xml; using System.Collections.ObjectModel; using System.Collections.Specialized; using System.Windows.Data; using System.Windows.Markup; namespace MS.Internal.Data { ////// Implementation of a data collection based on ArrayList, /// implementing INotifyCollectionChanged to notify listeners /// when items get added, removed or the whole list is refreshed. /// internal class XmlDataCollection : ReadOnlyObservableCollection{ //----------------------------------------------------- // // Constructors // //----------------------------------------------------- /// /// Initializes a new instance of XmlDataCollection that is empty and has the specified initial capacity. /// /// Parent Xml Data Source internal XmlDataCollection(XmlDataProvider xmlDataProvider) : base(new ObservableCollection()) { _xds = xmlDataProvider; } //------------------------------------------------------ // // Internal Properties // //----------------------------------------------------- /// /// XmlNamespaceManager property, XmlNamespaceManager used for executing XPath queries. /// internal XmlNamespaceManager XmlNamespaceManager { get { if (_nsMgr == null && _xds != null) _nsMgr = _xds.XmlNamespaceManager; return _nsMgr; } set { _nsMgr = value; } } internal XmlDataProvider ParentXmlDataProvider { get { return _xds; } } //------------------------------------------------------ // // Internal Methods // //------------------------------------------------------ // return true if the counts are different or the identity of the nodes have changed internal bool CollectionHasChanged(XmlNodeList nodes) { int count = this.Count; if (count != nodes.Count) return true; for (int i = 0; i < count; ++i) { if (this[i] != nodes[i]) return true; } return false; } // Update the collection using new query results internal void SynchronizeCollection(XmlNodeList nodes) { if (nodes == null) { Items.Clear(); return; } int i = 0, j; while (i < this.Count && i < nodes.Count) { if (this[i] != nodes[i]) { // starting after current node, see if the old node is still in the new list. for (j = i + 1; j < nodes.Count; ++j) { if (this[i] == nodes[j]) { break; } } if (j < nodes.Count) { // the node from existing collection is found at [j] in the new collection; // this means the node(s) [i ~ j-1] in new collection should be inserted. while (i < j) { Items.Insert(i, nodes[i]); ++i; } ++i; // advance to next node } else { // the node from existing collection is no longer in // the new collection, delete it. Items.RemoveAt(i); // do not advance to the next node } } else { // nodes are the same; advance to the next node. ++i; } } // Remove any extra nodes left over in the old collection while (i < this.Count) { Items.RemoveAt(i); } // Add any extra new nodes from the new collection while (i < nodes.Count) { Items.Insert(i, nodes[i]); ++i; } } private XmlDataProvider _xds; private XmlNamespaceManager _nsMgr; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // //// Copyright (C) 2003 by Microsoft Corporation. All rights reserved. // // // // Description: Data collection produced by an XmlDataProvider // // Specs: http://avalon/connecteddata/M5%20Specs/IDataCollection.mht // //--------------------------------------------------------------------------- using System.Xml; using System.Collections.ObjectModel; using System.Collections.Specialized; using System.Windows.Data; using System.Windows.Markup; namespace MS.Internal.Data { ////// Implementation of a data collection based on ArrayList, /// implementing INotifyCollectionChanged to notify listeners /// when items get added, removed or the whole list is refreshed. /// internal class XmlDataCollection : ReadOnlyObservableCollection{ //----------------------------------------------------- // // Constructors // //----------------------------------------------------- /// /// Initializes a new instance of XmlDataCollection that is empty and has the specified initial capacity. /// /// Parent Xml Data Source internal XmlDataCollection(XmlDataProvider xmlDataProvider) : base(new ObservableCollection()) { _xds = xmlDataProvider; } //------------------------------------------------------ // // Internal Properties // //----------------------------------------------------- /// /// XmlNamespaceManager property, XmlNamespaceManager used for executing XPath queries. /// internal XmlNamespaceManager XmlNamespaceManager { get { if (_nsMgr == null && _xds != null) _nsMgr = _xds.XmlNamespaceManager; return _nsMgr; } set { _nsMgr = value; } } internal XmlDataProvider ParentXmlDataProvider { get { return _xds; } } //------------------------------------------------------ // // Internal Methods // //------------------------------------------------------ // return true if the counts are different or the identity of the nodes have changed internal bool CollectionHasChanged(XmlNodeList nodes) { int count = this.Count; if (count != nodes.Count) return true; for (int i = 0; i < count; ++i) { if (this[i] != nodes[i]) return true; } return false; } // Update the collection using new query results internal void SynchronizeCollection(XmlNodeList nodes) { if (nodes == null) { Items.Clear(); return; } int i = 0, j; while (i < this.Count && i < nodes.Count) { if (this[i] != nodes[i]) { // starting after current node, see if the old node is still in the new list. for (j = i + 1; j < nodes.Count; ++j) { if (this[i] == nodes[j]) { break; } } if (j < nodes.Count) { // the node from existing collection is found at [j] in the new collection; // this means the node(s) [i ~ j-1] in new collection should be inserted. while (i < j) { Items.Insert(i, nodes[i]); ++i; } ++i; // advance to next node } else { // the node from existing collection is no longer in // the new collection, delete it. Items.RemoveAt(i); // do not advance to the next node } } else { // nodes are the same; advance to the next node. ++i; } } // Remove any extra nodes left over in the old collection while (i < this.Count) { Items.RemoveAt(i); } // Add any extra new nodes from the new collection while (i < nodes.Count) { Items.Insert(i, nodes[i]); ++i; } } private XmlDataProvider _xds; private XmlNamespaceManager _nsMgr; } } // 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
- MULTI_QI.cs
- AnonymousIdentificationModule.cs
- ToolboxItem.cs
- RuleAttributes.cs
- PropertyConverter.cs
- FileEnumerator.cs
- Freezable.cs
- TransactionScope.cs
- ThreadExceptionDialog.cs
- LambdaCompiler.Logical.cs
- WebPartCatalogCloseVerb.cs
- Attributes.cs
- PropertyKey.cs
- TransactionManager.cs
- LoadGrammarCompletedEventArgs.cs
- GeneralTransform3D.cs
- SessionPageStateSection.cs
- ContentType.cs
- WebPartUserCapability.cs
- IApplicationTrustManager.cs
- UnaryNode.cs
- ScriptManager.cs
- TemplateComponentConnector.cs
- TrackingLocationCollection.cs
- XmlWriterDelegator.cs
- LazyTextWriterCreator.cs
- CheckBoxPopupAdapter.cs
- DelegatingConfigHost.cs
- XmlSchemaSimpleTypeRestriction.cs
- PropertyGridView.cs
- Container.cs
- AudioBase.cs
- MetadataArtifactLoader.cs
- ClientUtils.cs
- RegistrySecurity.cs
- GeneralTransform3DGroup.cs
- XmlWriterTraceListener.cs
- TrustSection.cs
- FileLogRecordEnumerator.cs
- StorageEntityTypeMapping.cs
- SqlDataSourceCommandEventArgs.cs
- UriWriter.cs
- BrowserCapabilitiesFactory.cs
- VisualTreeHelper.cs
- ConfigurationManager.cs
- BasicBrowserDialog.cs
- AsyncSerializedWorker.cs
- AttachedPropertyBrowsableAttribute.cs
- SymbolDocumentInfo.cs
- ValidationErrorCollection.cs
- UserNameSecurityToken.cs
- StorageMappingFragment.cs
- DescriptionAttribute.cs
- TcpConnectionPool.cs
- ShaderRenderModeValidation.cs
- FolderBrowserDialog.cs
- SmiGettersStream.cs
- CompoundFileReference.cs
- SubMenuStyleCollection.cs
- Query.cs
- EffectiveValueEntry.cs
- SqlProcedureAttribute.cs
- SchemaCollectionPreprocessor.cs
- AudioFileOut.cs
- BamlLocalizableResource.cs
- LinqDataSourceDeleteEventArgs.cs
- SqlProviderServices.cs
- XmlSchemaSimpleTypeList.cs
- NavigatorInput.cs
- UnsafeNativeMethods.cs
- Animatable.cs
- WebPartTransformer.cs
- IsolatedStorageFileStream.cs
- ContainerParagraph.cs
- XmlDownloadManager.cs
- Substitution.cs
- xsdvalidator.cs
- _ScatterGatherBuffers.cs
- XmlLinkedNode.cs
- PointCollection.cs
- NamespaceEmitter.cs
- RoleService.cs
- AttributeCollection.cs
- LocalizableAttribute.cs
- ActivationArguments.cs
- RepeaterItemEventArgs.cs
- TaskResultSetter.cs
- BamlReader.cs
- TextBoxDesigner.cs
- MetadataCache.cs
- OdbcParameterCollection.cs
- __FastResourceComparer.cs
- AnnotationStore.cs
- ValueTypeFixupInfo.cs
- ObjectFactoryCodeDomTreeGenerator.cs
- ImageSource.cs
- BaseContextMenu.cs
- Schema.cs
- DataServiceProcessingPipelineEventArgs.cs
- counter.cs