Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / fx / src / Xml / System / Xml / XPath / XPathNodeIterator.cs / 3 / XPathNodeIterator.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml.XPath { using System; using System.Collections; using System.Diagnostics; using System.Text; [DebuggerDisplay("Position={CurrentPosition}, Current={debuggerDisplayProxy}")] public abstract class XPathNodeIterator : ICloneable, IEnumerable { internal int count = -1; object ICloneable.Clone() { return this.Clone(); } public abstract XPathNodeIterator Clone(); public abstract bool MoveNext(); public abstract XPathNavigator Current { get; } public abstract int CurrentPosition { get; } public virtual int Count { get { if (count == -1) { XPathNodeIterator clone = this.Clone(); while(clone.MoveNext()) ; count = clone.CurrentPosition; } return count; } } public virtual IEnumerator GetEnumerator() { return new Enumerator(this); } private object debuggerDisplayProxy { get { return Current == null ? null : (object)new XPathNavigator.DebuggerDisplayProxy(Current); } } ////// Implementation of a resetable enumerator that is linked to the XPathNodeIterator used to create it. /// private class Enumerator : IEnumerator { private XPathNodeIterator original; // Keep original XPathNodeIterator in case Reset() is called private XPathNodeIterator current; private bool iterationStarted; public Enumerator(XPathNodeIterator original) { this.original = original.Clone(); } public virtual object Current { get { // 1. Do not reuse the XPathNavigator, as we do in XPathNodeIterator // 2. Throw exception if current position is before first node or after the last node if (this.iterationStarted) { // Current is null if iterator is positioned after the last node if (this.current == null) throw new InvalidOperationException(Res.GetString(Res.Sch_EnumFinished, string.Empty)); return this.current.Current.Clone(); } // User must call MoveNext before accessing Current property throw new InvalidOperationException(Res.GetString(Res.Sch_EnumNotStarted, string.Empty)); } } public virtual bool MoveNext() { // Delegate to XPathNodeIterator if (!this.iterationStarted) { // Reset iteration to original position this.current = this.original.Clone(); this.iterationStarted = true; } if (this.current == null || !this.current.MoveNext()) { // Iteration complete this.current = null; return false; } return true; } public virtual void Reset() { this.iterationStarted = false; } } } } // 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
- EnvelopedPkcs7.cs
- GeometryDrawing.cs
- SynchronizedDispatch.cs
- StringHandle.cs
- AnnotationService.cs
- SqlConnectionPoolGroupProviderInfo.cs
- TreeNodeCollectionEditor.cs
- DataSourceListEditor.cs
- CompilerResults.cs
- BeginEvent.cs
- ToolStripLabel.cs
- MexTcpBindingCollectionElement.cs
- AutoGeneratedFieldProperties.cs
- TextServicesCompartmentEventSink.cs
- ExcludePathInfo.cs
- TracedNativeMethods.cs
- SafeProcessHandle.cs
- MenuItem.cs
- OrderedHashRepartitionStream.cs
- PersistenceContextEnlistment.cs
- StringAnimationUsingKeyFrames.cs
- ArglessEventHandlerProxy.cs
- XmlComplianceUtil.cs
- MdImport.cs
- SignedXml.cs
- CompilerWrapper.cs
- XPathNode.cs
- Transform.cs
- StylusDownEventArgs.cs
- MailMessage.cs
- PropertyChangedEventArgs.cs
- FillRuleValidation.cs
- Random.cs
- SocketException.cs
- CallContext.cs
- ToolStripDropDown.cs
- PersistenceTypeAttribute.cs
- DataExchangeServiceBinder.cs
- ExtenderProvidedPropertyAttribute.cs
- WebServiceFault.cs
- HtmlTableRowCollection.cs
- LZCodec.cs
- SplineKeyFrames.cs
- ObjectHandle.cs
- MemoryFailPoint.cs
- EntityParameter.cs
- ReachDocumentReferenceCollectionSerializerAsync.cs
- InputLangChangeRequestEvent.cs
- EntityRecordInfo.cs
- FixedFlowMap.cs
- DrawingVisual.cs
- TextDecorationLocationValidation.cs
- ToolConsole.cs
- ParameterModifier.cs
- QilName.cs
- Serializer.cs
- TemplateKeyConverter.cs
- DataGridViewCellStyle.cs
- XmlChildNodes.cs
- XPathMessageFilterElementComparer.cs
- OleDbCommand.cs
- SqlFileStream.cs
- ObjectContextServiceProvider.cs
- MobileCategoryAttribute.cs
- RowToFieldTransformer.cs
- ResourceWriter.cs
- QuarticEase.cs
- ConnectionPointCookie.cs
- EffectiveValueEntry.cs
- TemplatePagerField.cs
- EndpointDesigner.cs
- DrawingState.cs
- RSAPKCS1KeyExchangeDeformatter.cs
- RandomDelaySendsAsyncResult.cs
- MarkupObject.cs
- SqlBooleanMismatchVisitor.cs
- StrokeCollectionDefaultValueFactory.cs
- InfoCardSymmetricCrypto.cs
- Slider.cs
- WebExceptionStatus.cs
- SerialPort.cs
- WebPartDisplayMode.cs
- TextRangeSerialization.cs
- StatementContext.cs
- CurrencyManager.cs
- DispatcherHookEventArgs.cs
- CompositeTypefaceMetrics.cs
- SubMenuStyle.cs
- XmlTextEncoder.cs
- Timeline.cs
- SqlCharStream.cs
- ListItemCollection.cs
- QilTargetType.cs
- WebPartDeleteVerb.cs
- FilteredSchemaElementLookUpTable.cs
- SqlDependency.cs
- SubclassTypeValidator.cs
- Win32.cs
- LoadedEvent.cs
- prompt.cs