Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.Activities / System / Activities / OutArgument.cs / 1305376 / OutArgument.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace System.Activities { using System; using System.Activities.Expressions; using System.Activities.Runtime; using System.Activities.XamlIntegration; using System.Collections.Generic; using System.Collections.ObjectModel; using System.ComponentModel; using System.Linq.Expressions; using System.Runtime; using System.Windows.Markup; using System.Diagnostics.CodeAnalysis; public abstract class OutArgument : Argument { internal OutArgument() { this.Direction = ArgumentDirection.Out; } [SuppressMessage(FxCop.Category.Design, FxCop.Rule.ConsiderPassingBaseTypesAsParameters, Justification = "Subclass needed to enforce rules about which directions can be referenced.")] public static OutArgument CreateReference(OutArgument argumentToReference, string referencedArgumentName) { if (argumentToReference == null) { throw FxTrace.Exception.ArgumentNull("argumentToReference"); } if (string.IsNullOrEmpty(referencedArgumentName)) { throw FxTrace.Exception.ArgumentNullOrEmpty("referencedArgumentName"); } return (OutArgument)ActivityUtilities.CreateReferenceArgument(argumentToReference.ArgumentType, ArgumentDirection.Out, referencedArgumentName); } [SuppressMessage(FxCop.Category.Design, FxCop.Rule.ConsiderPassingBaseTypesAsParameters, Justification = "Subclass needed to enforce rules about which directions can be referenced.")] public static OutArgument CreateReference(InOutArgument argumentToReference, string referencedArgumentName) { if (argumentToReference == null) { throw FxTrace.Exception.ArgumentNull("argumentToReference"); } if (string.IsNullOrEmpty(referencedArgumentName)) { throw FxTrace.Exception.ArgumentNullOrEmpty("referencedArgumentName"); } // Note that we explicitly pass Out since we want an OutArgument created return (OutArgument)ActivityUtilities.CreateReferenceArgument(argumentToReference.ArgumentType, ArgumentDirection.Out, referencedArgumentName); } } [ContentProperty("Expression")] [TypeConverter(typeof(OutArgumentConverter))] [ValueSerializer(typeof(ArgumentValueSerializer))] public sealed class OutArgument: OutArgument { public OutArgument(Variable variable) : this() { if (variable != null) { this.Expression = new VariableReference { Variable = variable }; } } public OutArgument(DelegateArgument delegateArgument) : this() { if (delegateArgument != null) { this.Expression = new DelegateArgumentReference { DelegateArgument = delegateArgument }; } } public OutArgument(Expression > expression) : this() { if (expression != null) { this.Expression = new LambdaReference (expression); } } public OutArgument(Activity > expression) : this() { this.Expression = expression; } public OutArgument() : base() { this.ArgumentType = typeof(T); } [DefaultValue(null)] public new Activity > Expression { get; set; } internal override ActivityWithResult ExpressionCore { get { return this.Expression; } set { if (value == null) { this.Expression = null; return; } if (value is Activity >) { this.Expression = (Activity >)value; } else { // We do not verify compatibility here. We will do that // during CacheMetadata in Argument.Validate. this.Expression = new ActivityWithResultWrapper >(value); } } } public static implicit operator OutArgument (Variable variable) { return FromVariable(variable); } public static implicit operator OutArgument (DelegateArgument delegateArgument) { return FromDelegateArgument(delegateArgument); } public static implicit operator OutArgument (Activity > expression) { return FromExpression(expression); } public static OutArgument FromVariable(Variable variable) { if (variable == null) { throw FxTrace.Exception.ArgumentNull("variable"); } return new OutArgument (variable); } public static OutArgument FromDelegateArgument(DelegateArgument delegateArgument) { if (delegateArgument == null) { throw FxTrace.Exception.ArgumentNull("delegateArgument"); } return new OutArgument (delegateArgument); } public static OutArgument FromExpression(Activity > expression) { if (expression == null) { throw FxTrace.Exception.ArgumentNull("expression"); } return new OutArgument (expression); } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. public new Location GetLocation(ActivityContext context) { if (context == null) { throw FxTrace.Exception.ArgumentNull("context"); } ThrowIfNotInTree(); return context.GetLocation (this.RuntimeArgument); } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. public new T Get(ActivityContext context) { return Get (context); } public void Set(ActivityContext context, T value) { if (context == null) { throw FxTrace.Exception.ArgumentNull("context"); } ThrowIfNotInTree(); context.SetValue(this, value); } internal override Location CreateDefaultLocation() { return Argument.CreateLocation (); } internal override void Declare(LocationEnvironment targetEnvironment, ActivityInstance activityInstance) { targetEnvironment.DeclareTemporaryLocation >(this.RuntimeArgument, activityInstance, true); } internal override bool TryPopulateValue(LocationEnvironment targetEnvironment, ActivityInstance targetActivityInstance, ActivityContext resolutionContext) { Fx.Assert(this.Expression != null, "This should only be called for non-empty bindings."); Location argumentValue; if (this.Expression.TryGetValue(resolutionContext, out argumentValue)) { targetEnvironment.Declare(this.RuntimeArgument, argumentValue.CreateReference(true), targetActivityInstance); return true; } else { targetEnvironment.DeclareTemporaryLocation >(this.RuntimeArgument, targetActivityInstance, true); return false; } } } } // 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
- DbDataSourceEnumerator.cs
- RowsCopiedEventArgs.cs
- SHA384.cs
- IsolatedStorageFile.cs
- CodeConstructor.cs
- NameHandler.cs
- MessageDecoder.cs
- SizeIndependentAnimationStorage.cs
- IconConverter.cs
- EntityDataSourceReferenceGroup.cs
- ParserOptions.cs
- FieldAccessException.cs
- FlowLayoutSettings.cs
- HitTestParameters3D.cs
- BufferedReadStream.cs
- COM2IPerPropertyBrowsingHandler.cs
- AssemblyCache.cs
- XmlDictionaryReaderQuotas.cs
- WebPartDisplayModeCancelEventArgs.cs
- ApplicationSettingsBase.cs
- ListBoxItem.cs
- ObjectSelectorEditor.cs
- QueryStatement.cs
- Version.cs
- RoutedEventValueSerializer.cs
- SerializationAttributes.cs
- NullRuntimeConfig.cs
- XmlSchemaImporter.cs
- StoreAnnotationsMap.cs
- ServiceOperationWrapper.cs
- LogicalMethodInfo.cs
- XmlIterators.cs
- XmlSerializerFactory.cs
- FlowDocumentFormatter.cs
- IUnknownConstantAttribute.cs
- TextureBrush.cs
- DispatchProxy.cs
- HttpException.cs
- RuntimeConfig.cs
- SkinBuilder.cs
- XamlSerializerUtil.cs
- StringBuilder.cs
- SmtpTransport.cs
- DBCommandBuilder.cs
- Link.cs
- Binding.cs
- CatalogZoneDesigner.cs
- BamlVersionHeader.cs
- MLangCodePageEncoding.cs
- Signature.cs
- CodeMethodInvokeExpression.cs
- PrePostDescendentsWalker.cs
- RuleSettings.cs
- UrlPath.cs
- ToolStripDropDownMenu.cs
- Cursors.cs
- InputScope.cs
- SHA1CryptoServiceProvider.cs
- XmlCharCheckingReader.cs
- BinHexEncoding.cs
- RegexParser.cs
- SecurityHelper.cs
- DataGridViewComboBoxEditingControl.cs
- TextDataBindingHandler.cs
- IImplicitResourceProvider.cs
- ClientUriBehavior.cs
- AccessKeyManager.cs
- IDispatchConstantAttribute.cs
- MaskPropertyEditor.cs
- ClientSession.cs
- MobileRedirect.cs
- WindowsImpersonationContext.cs
- ISAPIApplicationHost.cs
- WebPartEditorOkVerb.cs
- Image.cs
- GACMembershipCondition.cs
- XMLSyntaxException.cs
- EmptyControlCollection.cs
- NavigatorInput.cs
- XamlStyleSerializer.cs
- WebPartConnectionsCloseVerb.cs
- HttpListenerRequest.cs
- DesignerHost.cs
- CachedPathData.cs
- DiscoveryClientOutputChannel.cs
- ClientRoleProvider.cs
- DetailsViewInsertEventArgs.cs
- NotFiniteNumberException.cs
- CryptoConfig.cs
- ProxyWebPartManager.cs
- AutomationEvent.cs
- RegisteredHiddenField.cs
- IDQuery.cs
- Encoder.cs
- TransactionBehavior.cs
- Point3D.cs
- PropertyTabChangedEvent.cs
- FastEncoderWindow.cs
- SplitContainerDesigner.cs
- TdsRecordBufferSetter.cs