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
- XPathConvert.cs
- DiscoveryExceptionDictionary.cs
- BuilderElements.cs
- BitmapScalingModeValidation.cs
- Condition.cs
- DataError.cs
- StandardTransformFactory.cs
- Model3DGroup.cs
- IndexedSelectQueryOperator.cs
- FrameworkEventSource.cs
- FontStretch.cs
- ObjectFullSpanRewriter.cs
- PropertyEntry.cs
- AssemblyAttributes.cs
- VirtualPath.cs
- SplitContainer.cs
- DynamicValidator.cs
- DataTable.cs
- ServerValidateEventArgs.cs
- ProfileParameter.cs
- ToolBarPanel.cs
- DesignBindingEditor.cs
- SoundPlayerAction.cs
- GuidelineCollection.cs
- Camera.cs
- SqlMetaData.cs
- SessionParameter.cs
- TextEditorTables.cs
- IpcManager.cs
- XmlSchemaAnyAttribute.cs
- DiscoveryUtility.cs
- DesignerOptionService.cs
- ColorInterpolationModeValidation.cs
- StylusPointCollection.cs
- SelectionHighlightInfo.cs
- ToolStripPanelRow.cs
- SafeNativeMethods.cs
- Keyboard.cs
- NamedPipeTransportBindingElement.cs
- AutomationPeer.cs
- EmissiveMaterial.cs
- AssociatedControlConverter.cs
- EntityRecordInfo.cs
- InvalidOperationException.cs
- ListControl.cs
- DrawListViewItemEventArgs.cs
- RemotingAttributes.cs
- ImageResources.Designer.cs
- BindingValueChangedEventArgs.cs
- ObjectStateEntryDbUpdatableDataRecord.cs
- RenderDataDrawingContext.cs
- MimeFormatExtensions.cs
- ObjectTypeMapping.cs
- IndentedWriter.cs
- TextHidden.cs
- ILGenerator.cs
- FormsAuthenticationUserCollection.cs
- RegexCapture.cs
- SqlDataSourceFilteringEventArgs.cs
- NativeWindow.cs
- TypeBuilder.cs
- DummyDataSource.cs
- PointAnimationUsingPath.cs
- PersonalizationProviderHelper.cs
- FlowThrottle.cs
- ReferentialConstraint.cs
- ChainOfResponsibility.cs
- MatrixCamera.cs
- XmlReflectionMember.cs
- ComplusTypeValidator.cs
- LinqDataSourceDeleteEventArgs.cs
- DataGridViewComboBoxEditingControl.cs
- TerminatorSinks.cs
- QueryCacheEntry.cs
- CellParaClient.cs
- ChildTable.cs
- UxThemeWrapper.cs
- CustomWebEventKey.cs
- AssemblyAssociatedContentFileAttribute.cs
- UInt16Storage.cs
- DataViewManagerListItemTypeDescriptor.cs
- CompiledQuery.cs
- TextBoxAutomationPeer.cs
- DropDownHolder.cs
- RawStylusSystemGestureInputReport.cs
- BamlResourceDeserializer.cs
- ConfigurationStrings.cs
- DES.cs
- HtmlTextArea.cs
- TextHidden.cs
- WindowsMenu.cs
- WebPartEditorCancelVerb.cs
- WebBrowserBase.cs
- CommandDesigner.cs
- SslStream.cs
- OdbcInfoMessageEvent.cs
- TemplateBindingExpression.cs
- FormatterServicesNoSerializableCheck.cs
- Scene3D.cs
- InstanceData.cs