Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Common / CommandTrees / ExpressionBindings.cs / 1305376 / ExpressionBindings.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Data.Common; using System.Data.Common.Utils; using System.Data.Metadata.Edm; using System.Data.Common.CommandTrees.Internal; using System.Data.Common.CommandTrees.ExpressionBuilder; namespace System.Data.Common.CommandTrees { ////// Describes a binding for an expression. Conceptually similar to a foreach loop /// in C#. The DbExpression property defines the collection being iterated over, /// while the Var property provides a means to reference the current element /// of the collection during the iteration. DbExpressionBinding is used to describe the set arguments /// to relational expressions such as ///, /// and . /// /// [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public sealed class DbExpressionBinding { private readonly DbExpression _expr; private readonly DbVariableReferenceExpression _varRef; internal DbExpressionBinding(DbExpression input, DbVariableReferenceExpression varRef) { Debug.Assert(input != null, "DbExpressionBinding input cannot be null"); Debug.Assert(varRef != null, "DbExpressionBinding variable cannot be null"); _expr = input; _varRef = varRef; } /// /// Gets the public DbExpression Expression { get { return _expr; } } ///that defines the input set. /// /// Gets the name assigned to the element variable. /// public string VariableName { get { return _varRef.VariableName; } } ////// Gets the type metadata of the element variable. /// public TypeUsage VariableType { get { return _varRef.ResultType; } } ////// Gets the public DbVariableReferenceExpression Variable { get { return _varRef;} } } ///that references the element variable. /// /// Defines the binding for the input set to a [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public sealed class DbGroupExpressionBinding { private /*readonly*/ DbExpression _expr; private readonly DbVariableReferenceExpression _varRef; private readonly DbVariableReferenceExpression _groupVarRef; private DbGroupAggregate _groupAggregate; internal DbGroupExpressionBinding(DbExpression input, DbVariableReferenceExpression inputRef, DbVariableReferenceExpression groupRef) { _expr = input; _varRef = inputRef; _groupVarRef = groupRef; } ///. /// In addition to the properties of , DbGroupExpressionBinding /// also provides access to the group element via the variable reference /// and to the group aggregate via the property. /// /// Gets the public DbExpression Expression { get { return _expr; } } ///that defines the input set. /// /// Gets the name assigned to the element variable. /// public string VariableName { get { return _varRef.VariableName; } } ////// Gets the type metadata of the element variable. /// public TypeUsage VariableType { get { return _varRef.ResultType; } } ////// Gets the DbVariableReferenceExpression that references the element variable. /// public DbVariableReferenceExpression Variable { get { return _varRef; } } ////// Gets the name assigned to the group element variable. /// public string GroupVariableName { get { return _groupVarRef.VariableName; } } ////// Gets the type metadata of the group element variable. /// public TypeUsage GroupVariableType { get { return _groupVarRef.ResultType; } } ////// Gets the DbVariableReferenceExpression that references the group element variable. /// public DbVariableReferenceExpression GroupVariable { get { return _groupVarRef; } } ////// Gets the DbGroupAggregate that represents the collection of elements of the group. /// public DbGroupAggregate GroupAggregate { get { if (_groupAggregate == null) { _groupAggregate = DbExpressionBuilder.GroupAggregate(this.GroupVariable); } return _groupAggregate; } } } } // 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
- SQLDateTimeStorage.cs
- XmlExtensionFunction.cs
- FixedBufferAttribute.cs
- Italic.cs
- BasicExpandProvider.cs
- safemediahandle.cs
- WebPartCollection.cs
- KnownAssemblyEntry.cs
- NodeFunctions.cs
- EventProxy.cs
- ContextMenu.cs
- LoadRetryHandler.cs
- PopupRoot.cs
- Utils.cs
- DataGridViewCellContextMenuStripNeededEventArgs.cs
- EntityDataSource.cs
- ByteArrayHelperWithString.cs
- CompositeFontFamily.cs
- FieldCollectionEditor.cs
- BitmapEffectInputData.cs
- dataprotectionpermission.cs
- ToolStripTextBox.cs
- shaperfactoryquerycachekey.cs
- DirtyTextRange.cs
- DeferredBinaryDeserializerExtension.cs
- HttpModulesSection.cs
- Message.cs
- EtwTrace.cs
- TraceListeners.cs
- AnimationException.cs
- CodeStatement.cs
- UpDownEvent.cs
- TableStyle.cs
- SqlIdentifier.cs
- LoadWorkflowByKeyAsyncResult.cs
- ColumnHeaderCollectionEditor.cs
- EventDescriptorCollection.cs
- RetriableClipboard.cs
- BitmapCacheBrush.cs
- ManagementOptions.cs
- ConfigurationLocation.cs
- ParallelDesigner.cs
- TcpTransportSecurityElement.cs
- ServicePoint.cs
- AppModelKnownContentFactory.cs
- XslCompiledTransform.cs
- SqlTypeSystemProvider.cs
- HttpException.cs
- CollectionViewGroupInternal.cs
- Composition.cs
- WebBrowser.cs
- GetFileNameResult.cs
- InputChannelAcceptor.cs
- CatchDesigner.xaml.cs
- FileDialogCustomPlacesCollection.cs
- XhtmlBasicSelectionListAdapter.cs
- ViewCellRelation.cs
- SchemaTableColumn.cs
- ToolStripSplitStackLayout.cs
- WebControl.cs
- CodeMethodInvokeExpression.cs
- FixedElement.cs
- XmlElementElementCollection.cs
- RefreshPropertiesAttribute.cs
- SectionXmlInfo.cs
- SafeArrayTypeMismatchException.cs
- ReadOnlyCollection.cs
- MailWebEventProvider.cs
- DefaultParameterValueAttribute.cs
- TableRow.cs
- Constants.cs
- FileEnumerator.cs
- RawStylusInputCustomDataList.cs
- GZipDecoder.cs
- XmlHelper.cs
- ClientClassGenerator.cs
- DBConnectionString.cs
- InArgumentConverter.cs
- TextTreeObjectNode.cs
- Simplifier.cs
- HashAlgorithm.cs
- GlyphInfoList.cs
- Operand.cs
- VisualStyleRenderer.cs
- BamlReader.cs
- AllMembershipCondition.cs
- ClosableStream.cs
- MissingSatelliteAssemblyException.cs
- SoapSchemaImporter.cs
- EntityDataSourceEntityTypeFilterItem.cs
- WebPartZoneAutoFormat.cs
- DynamicDiscoSearcher.cs
- ColumnResizeAdorner.cs
- SettingsPropertyValueCollection.cs
- BuildProvidersCompiler.cs
- NativeCppClassAttribute.cs
- PeerResolver.cs
- SynchronizationLockException.cs
- ModelPropertyDescriptor.cs
- SoapException.cs