Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.Activities / System / Activities / Expressions / And.cs / 1305376 / And.cs
//---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //--------------------------------------------------------------- namespace System.Activities.Expressions { using System.Activities; using System.Activities.Statements; using System.Linq.Expressions; using System.Activities.Validation; using System.Collections.Generic; using System.ComponentModel; using System.Runtime; using System.Diagnostics.CodeAnalysis; [SuppressMessage(FxCop.Category.Naming, FxCop.Rule.IdentifiersShouldNotMatchKeywords, Justification = "Optimizing for XAML naming. VB imperative users will [] qualify (e.g. New [And])")] public sealed class And: CodeActivity { //Lock is not needed for operationFunction here. The reason is that delegates for a given And are the same. //It's possible that 2 threads are assigning the operationFucntion at the same time. But it's okay because the compiled codes are the same. static Func operationFunction; [RequiredArgument] [DefaultValue(null)] public InArgument Left { get; set; } [RequiredArgument] [DefaultValue(null)] public InArgument Right { get; set; } protected override void CacheMetadata(CodeActivityMetadata metadata) { BinaryExpressionHelper.OnGetArguments(metadata, this.Left, this.Right); if (operationFunction == null) { ValidationError validationError; if (!BinaryExpressionHelper.TryGenerateLinqDelegate(ExpressionType.And, out operationFunction, out validationError)) { metadata.AddValidationError(validationError); } } } protected override TResult Execute(CodeActivityContext context) { Fx.Assert(operationFunction != null, "OperationFunction must exist."); TLeft leftValue = this.Left.Get(context); TRight rightValue = this.Right.Get(context); return operationFunction(leftValue, rightValue); } } } // 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
- ExceptionWrapper.cs
- SqlRecordBuffer.cs
- ValueOfAction.cs
- Transactions.cs
- ImageFormatConverter.cs
- AsymmetricSecurityBindingElement.cs
- Int32.cs
- RouteData.cs
- GregorianCalendarHelper.cs
- Input.cs
- HebrewCalendar.cs
- VirtualDirectoryMapping.cs
- MemberCollection.cs
- TextViewSelectionProcessor.cs
- StorageRoot.cs
- DataGridViewAutoSizeModeEventArgs.cs
- ObjectDataSource.cs
- Converter.cs
- DataServiceKeyAttribute.cs
- ResourcesGenerator.cs
- RectAnimation.cs
- OptimizedTemplateContentHelper.cs
- GestureRecognitionResult.cs
- AccessedThroughPropertyAttribute.cs
- CountAggregationOperator.cs
- ConfigurationElementProperty.cs
- StyleCollection.cs
- ValidationHelpers.cs
- TextCharacters.cs
- SecurityTokenResolver.cs
- CompositeTypefaceMetrics.cs
- LinkLabelLinkClickedEvent.cs
- EntityDataSourceDataSelectionPanel.cs
- StringValidator.cs
- TextElementCollectionHelper.cs
- SqlWebEventProvider.cs
- sqlpipe.cs
- NodeInfo.cs
- XmlNamespaceManager.cs
- UiaCoreProviderApi.cs
- CSharpCodeProvider.cs
- DataGridCell.cs
- PropertyToken.cs
- HtmlShimManager.cs
- ComplexBindingPropertiesAttribute.cs
- tooltip.cs
- HtmlInputImage.cs
- tooltip.cs
- AmbientValueAttribute.cs
- ProtocolsConfigurationEntry.cs
- BindingSource.cs
- ToolBarTray.cs
- RelationshipDetailsRow.cs
- XamlInt32CollectionSerializer.cs
- NumberFormatInfo.cs
- DateTimeFormatInfoScanner.cs
- NotFiniteNumberException.cs
- ScriptModule.cs
- MessageSmuggler.cs
- ObjectParameterCollection.cs
- WindowShowOrOpenTracker.cs
- ZipIOExtraFieldPaddingElement.cs
- BorderGapMaskConverter.cs
- TransactionChannelFaultConverter.cs
- ArgumentFixer.cs
- FuncTypeConverter.cs
- SelectionRange.cs
- StatusBar.cs
- ConfigurationManagerInternal.cs
- RoleManagerModule.cs
- NullableIntAverageAggregationOperator.cs
- TypeElement.cs
- ToolboxItemFilterAttribute.cs
- HtmlShim.cs
- _HeaderInfo.cs
- DataSourceXmlSerializationAttribute.cs
- HttpFileCollection.cs
- CallbackHandler.cs
- RowUpdatedEventArgs.cs
- DataTableReaderListener.cs
- SqlRewriteScalarSubqueries.cs
- StartFileNameEditor.cs
- TabControl.cs
- ApplicationFileParser.cs
- pingexception.cs
- FrameworkElement.cs
- DiscoveryEndpoint.cs
- SslStream.cs
- WebPartActionVerb.cs
- DivideByZeroException.cs
- EventLogPermissionEntry.cs
- CssTextWriter.cs
- GenerateScriptTypeAttribute.cs
- StylusEventArgs.cs
- WebMessageEncoderFactory.cs
- ConditionValidator.cs
- AutoGeneratedField.cs
- ViewBase.cs
- Renderer.cs
- VirtualDirectoryMapping.cs