Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / ExtensionQuery.cs / 2 / ExtensionQuery.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace MS.Internal.Xml.XPath { using System; using System.Xml; using System.Xml.Xsl; using System.Xml.XPath; using System.Diagnostics; using System.Globalization; using System.Collections; internal abstract class ExtensionQuery : Query { protected string prefix; protected string name; protected XsltContext xsltContext; private ResetableIterator queryIterator; public ExtensionQuery(string prefix, string name) : base() { this.prefix = prefix; this.name = name; } protected ExtensionQuery(ExtensionQuery other) : base(other) { this.prefix = other.prefix; this.name = other.name; this.xsltContext = other.xsltContext; this.queryIterator = (ResetableIterator)Clone(other.queryIterator); } public override void Reset() { if (queryIterator != null) { queryIterator.Reset(); } } public override XPathNavigator Current { get { if (queryIterator == null) { throw XPathException.Create(Res.Xp_NodeSetExpected); } if (queryIterator.CurrentPosition == 0) { Advance(); } return queryIterator.Current; } } public override XPathNavigator Advance() { if (queryIterator == null) { throw XPathException.Create(Res.Xp_NodeSetExpected); } if (queryIterator.MoveNext()) { return queryIterator.Current; } return null; } public override int CurrentPosition { get { if (queryIterator != null) { return queryIterator.CurrentPosition; } return 0; } } protected object ProcessResult(object value) { if (value is string ) return value; if (value is double ) return value; if (value is bool ) return value; if (value is XPathNavigator) return value; if (value is Int32 ) return (double)(Int32)value; if (value == null) { queryIterator = XPathEmptyIterator.Instance; return this; // We map null to NodeSet to let $null/foo work well. } ResetableIterator resetable = value as ResetableIterator; if (resetable != null) { // We need Clone() value because variable may be used several times // and they shouldn't queryIterator = (ResetableIterator)resetable.Clone(); return this; } XPathNodeIterator nodeIterator = value as XPathNodeIterator; if (nodeIterator != null) { queryIterator = new XPathArrayIterator(nodeIterator); return this; } IXPathNavigable navigable = value as IXPathNavigable; if(navigable != null) { return navigable.CreateNavigator(); } if (value is Int16 ) return (double)(Int16)value; if (value is Int64 ) return (double)(Int64)value; if (value is UInt32) return (double)(UInt32)value; if (value is UInt16) return (double)(UInt16)value; if (value is UInt64) return (double)(UInt64)value; if (value is Single) return (double)(Single)value; if (value is Decimal) return (double)(Decimal)value; return value.ToString(); } protected string QName { get { return prefix.Length != 0 ? prefix + ":" + name : name; } } public override int Count { get { return queryIterator == null ? 1 : queryIterator.Count; } } public override XPathResultType StaticType { get { return XPathResultType.Any; } } } } // 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
- ComboBoxItem.cs
- SortableBindingList.cs
- RelativeSource.cs
- IntranetCredentialPolicy.cs
- smtppermission.cs
- CryptoStream.cs
- ClonableStack.cs
- SQLSingle.cs
- Utils.cs
- MediaContextNotificationWindow.cs
- FlowLayoutPanel.cs
- SessionParameter.cs
- ViewStateModeByIdAttribute.cs
- DesignerActionService.cs
- ValueChangedEventManager.cs
- PropertyEmitter.cs
- SqlDataSourceConfigureSelectPanel.cs
- TemplatedWizardStep.cs
- ExpressionVisitorHelpers.cs
- DataComponentGenerator.cs
- XmlWrappingWriter.cs
- SmtpException.cs
- OleDbCommand.cs
- ItemChangedEventArgs.cs
- ToolTip.cs
- SqlFunctionAttribute.cs
- BamlVersionHeader.cs
- ExpanderAutomationPeer.cs
- DispatchWrapper.cs
- ConstrainedDataObject.cs
- ConstraintEnumerator.cs
- WebServiceMethodData.cs
- ControlBuilderAttribute.cs
- Gdiplus.cs
- FrameworkElement.cs
- HostingMessageProperty.cs
- ClientTarget.cs
- TrueReadOnlyCollection.cs
- DashStyle.cs
- DBCommandBuilder.cs
- ClientBuildManagerCallback.cs
- CmsInterop.cs
- AutomationPeer.cs
- ReflectionUtil.cs
- NativeObjectSecurity.cs
- MetadataSet.cs
- UnsafeNativeMethods.cs
- DataSourceControl.cs
- Maps.cs
- SwitchAttribute.cs
- VirtualizingPanel.cs
- ClientBuildManagerCallback.cs
- SystemUdpStatistics.cs
- BypassElementCollection.cs
- TreeNodeStyle.cs
- URL.cs
- Propagator.cs
- InitializationEventAttribute.cs
- InputLangChangeEvent.cs
- UnsafeNativeMethods.cs
- LicenseContext.cs
- MissingMemberException.cs
- ChannelSinkStacks.cs
- ColumnWidthChangedEvent.cs
- TransactionalPackage.cs
- WebUtil.cs
- DesignerAdapterAttribute.cs
- DataViewManager.cs
- Select.cs
- TableRow.cs
- _AutoWebProxyScriptEngine.cs
- RepeaterItemCollection.cs
- ConsumerConnectionPointCollection.cs
- GlyphTypeface.cs
- Select.cs
- IBuiltInEvidence.cs
- DataTableNewRowEvent.cs
- PropertySet.cs
- ControlPaint.cs
- TemplateModeChangedEventArgs.cs
- BooleanProjectedSlot.cs
- XpsViewerException.cs
- RegexParser.cs
- NativeRecognizer.cs
- _ProxyRegBlob.cs
- NullableFloatAverageAggregationOperator.cs
- EntityViewGenerationAttribute.cs
- CardSpacePolicyElement.cs
- StringExpressionSet.cs
- XmlCDATASection.cs
- PackWebResponse.cs
- RelatedView.cs
- TimeSpanConverter.cs
- TraceSwitch.cs
- SessionIDManager.cs
- MappingModelBuildProvider.cs
- XmlChildEnumerator.cs
- DetailsViewPagerRow.cs
- DataExpression.cs
- AsymmetricSignatureDeformatter.cs