Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Objects / DataClasses / RelationshipNavigation.cs / 1 / RelationshipNavigation.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Data.Common; using System.Globalization; using System.Text; namespace System.Data.Objects.DataClasses { ////// This class describes a relationship navigation from the /// navigation property on one entity to another entity. It is /// used throughout the collections and refs system to describe a /// relationship and to connect from the navigation property on /// one end of a relationship to the navigation property on the /// other end. /// // devnote: Might be able to change this back to a valuetype given its current purpose [Serializable] internal class RelationshipNavigation { // ------------ // Constructors // ------------ ////// Creates a navigation object with the given relationship /// name, role name for the source and role name for the /// destination. /// /// Canonical-space name of the relationship. /// Name of the role/navigation property which is the source of the navigation. /// Name of the role/navigation property which is the destination of the navigation. internal RelationshipNavigation(string relationshipName, string from, string to) { EntityUtil.CheckStringArgument(relationshipName, "relationshipName"); EntityUtil.CheckStringArgument(from, "from"); EntityUtil.CheckStringArgument(to, "to"); _relationshipName = relationshipName; _from = from; _to = to; } // ------ // Fields // ------ // The following fields are serialized. Adding or removing a serialized field is considered // a breaking change. This includes changing the field type or field name of existing // serialized fields. If you need to make this kind of change, it may be possible, but it // will require some custom serialization/deserialization code. private readonly string _relationshipName; private readonly string _from; private readonly string _to; [NonSerialized] private RelationshipNavigation _reverse; // ---------- // Properties // ---------- ////// Canonical-space relationship name. /// internal string RelationshipName { get { return _relationshipName; } } ////// Role/navigation property name for the source of this navigation. /// internal string From { get { return _from; } } ////// Role/navigation property name for the destination of this navigation. /// internal string To { get { return _to; } } ////// The "reverse" version of this navigation. /// internal RelationshipNavigation Reverse { get { if (_reverse == null) { // the reverse relationship is exactly like this // one but from & to are switched _reverse = new RelationshipNavigation(_relationshipName, _to, _from); } return _reverse; } } ////// Compares this instance to a given Navigation by their values. /// public override bool Equals(object obj) { RelationshipNavigation compareTo = obj as RelationshipNavigation; return ((this == compareTo) || ((null != this) && (null != compareTo) && (this.RelationshipName == compareTo.RelationshipName) && (this.From == compareTo.From) && (this.To == compareTo.To))); } ////// Returns a value-based hash code. /// ///the hash value of this Navigation public override int GetHashCode() { return this.RelationshipName.GetHashCode(); } // ------- // Methods // ------- ////// ToString is provided to simplify debugging, etc. /// public override string ToString() { return String.Format(CultureInfo.InvariantCulture, "RelationshipNavigation: ({0},{1},{2})", _relationshipName, _from, _to); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Data.Common; using System.Globalization; using System.Text; namespace System.Data.Objects.DataClasses { ////// This class describes a relationship navigation from the /// navigation property on one entity to another entity. It is /// used throughout the collections and refs system to describe a /// relationship and to connect from the navigation property on /// one end of a relationship to the navigation property on the /// other end. /// // devnote: Might be able to change this back to a valuetype given its current purpose [Serializable] internal class RelationshipNavigation { // ------------ // Constructors // ------------ ////// Creates a navigation object with the given relationship /// name, role name for the source and role name for the /// destination. /// /// Canonical-space name of the relationship. /// Name of the role/navigation property which is the source of the navigation. /// Name of the role/navigation property which is the destination of the navigation. internal RelationshipNavigation(string relationshipName, string from, string to) { EntityUtil.CheckStringArgument(relationshipName, "relationshipName"); EntityUtil.CheckStringArgument(from, "from"); EntityUtil.CheckStringArgument(to, "to"); _relationshipName = relationshipName; _from = from; _to = to; } // ------ // Fields // ------ // The following fields are serialized. Adding or removing a serialized field is considered // a breaking change. This includes changing the field type or field name of existing // serialized fields. If you need to make this kind of change, it may be possible, but it // will require some custom serialization/deserialization code. private readonly string _relationshipName; private readonly string _from; private readonly string _to; [NonSerialized] private RelationshipNavigation _reverse; // ---------- // Properties // ---------- ////// Canonical-space relationship name. /// internal string RelationshipName { get { return _relationshipName; } } ////// Role/navigation property name for the source of this navigation. /// internal string From { get { return _from; } } ////// Role/navigation property name for the destination of this navigation. /// internal string To { get { return _to; } } ////// The "reverse" version of this navigation. /// internal RelationshipNavigation Reverse { get { if (_reverse == null) { // the reverse relationship is exactly like this // one but from & to are switched _reverse = new RelationshipNavigation(_relationshipName, _to, _from); } return _reverse; } } ////// Compares this instance to a given Navigation by their values. /// public override bool Equals(object obj) { RelationshipNavigation compareTo = obj as RelationshipNavigation; return ((this == compareTo) || ((null != this) && (null != compareTo) && (this.RelationshipName == compareTo.RelationshipName) && (this.From == compareTo.From) && (this.To == compareTo.To))); } ////// Returns a value-based hash code. /// ///the hash value of this Navigation public override int GetHashCode() { return this.RelationshipName.GetHashCode(); } // ------- // Methods // ------- ////// ToString is provided to simplify debugging, etc. /// public override string ToString() { return String.Format(CultureInfo.InvariantCulture, "RelationshipNavigation: ({0},{1},{2})", _relationshipName, _from, _to); } } } // 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
- SplitterPanel.cs
- XmlSchemaImport.cs
- ContextMenuService.cs
- MetadataItemCollectionFactory.cs
- CustomWebEventKey.cs
- ResourceType.cs
- MaterialGroup.cs
- ClientRequest.cs
- SynchronizedDispatch.cs
- TransformerTypeCollection.cs
- ObjectStateEntryDbUpdatableDataRecord.cs
- XmlValueConverter.cs
- WindowsClientElement.cs
- XMLDiffLoader.cs
- DmlSqlGenerator.cs
- BaseParagraph.cs
- TransformationRules.cs
- MemoryPressure.cs
- OpenFileDialog.cs
- TextBounds.cs
- DesignerExtenders.cs
- StrongNameIdentityPermission.cs
- DefaultWorkflowLoaderService.cs
- UseLicense.cs
- DateTimeOffsetStorage.cs
- StateManagedCollection.cs
- ExpanderAutomationPeer.cs
- DBCommand.cs
- PageThemeBuildProvider.cs
- BitmapDownload.cs
- ParserExtension.cs
- QilCloneVisitor.cs
- DataSourceCache.cs
- ControlBuilderAttribute.cs
- OciLobLocator.cs
- XmlBinaryReader.cs
- KeyboardDevice.cs
- DropShadowEffect.cs
- WindowsScrollBar.cs
- SqlErrorCollection.cs
- SqlCommand.cs
- ScrollBarAutomationPeer.cs
- ISAPIWorkerRequest.cs
- Int16Storage.cs
- ApplicationServicesHostFactory.cs
- TextBoxView.cs
- ObjectHandle.cs
- MiniMapControl.xaml.cs
- CharacterBuffer.cs
- IPCCacheManager.cs
- SqlNotificationEventArgs.cs
- SoundPlayer.cs
- RouteParameter.cs
- ProfileInfo.cs
- AmbientLight.cs
- GroupBoxAutomationPeer.cs
- TraceContextEventArgs.cs
- WindowsScrollBar.cs
- ToolStripSplitStackLayout.cs
- CompareValidator.cs
- FileDialog_Vista.cs
- TimeSpanValidator.cs
- OleDbPermission.cs
- XmlElementAttribute.cs
- HostingPreferredMapPath.cs
- ContextDataSourceView.cs
- Dictionary.cs
- IntSecurity.cs
- CacheRequest.cs
- NavigationPropertySingletonExpression.cs
- DetailsViewInsertedEventArgs.cs
- TextEditorTyping.cs
- ApplicationActivator.cs
- SqlCrossApplyToCrossJoin.cs
- NextPreviousPagerField.cs
- ArrayList.cs
- Compiler.cs
- AutomationIdentifier.cs
- ListenerBinder.cs
- IDataContractSurrogate.cs
- CounterCreationDataConverter.cs
- TypeSystem.cs
- RegisterInfo.cs
- RelationshipConverter.cs
- HandleRef.cs
- Msec.cs
- DataGridDefaultColumnWidthTypeConverter.cs
- TemplatePartAttribute.cs
- PropertyInformation.cs
- PartialClassGenerationTask.cs
- XmlChoiceIdentifierAttribute.cs
- SemaphoreSecurity.cs
- GridViewHeaderRowPresenter.cs
- MemoryFailPoint.cs
- EventPropertyMap.cs
- CodeChecksumPragma.cs
- ClassValidator.cs
- CommandPlan.cs
- SocketElement.cs
- AmbientLight.cs