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System.Workflow.ComponentModel Namespace

Provides the base classes, interfaces, and core modeling constructs that are used to create activities and workflows.

  ClassDescription
Public classActivityRepresents the fundamental building block of workflows. Activity is the base class for all activities.
Public classActivityBindBinds an activity's property to a property, field, indexer, method, event, or another activity's property. This class cannot be inherited.
Public classActivityChangeActionRepresents a proposed change to a CompositeActivity within a running workflow instance. This class must be inherited.
Public classActivityCollectionModels a strongly typed ICollection of type Activity.
Public classActivityCollectionChangeEventArgsRepresents the information needed by an event handler to perform custom processing whenever the contents of an ActivityCollection changes.
Public classActivityConditionRepresents an abstract class for an expression, which evaluates to a Boolean. This class must be inherited.
Public classActivityExecutionContextRepresents the execution environment of an Activity. This class cannot be inherited.
Public classActivityExecutionContextManagerAllows a CompositeActivity to create and manage execution contexts for its child activities. This class cannot be inherited.
Public classActivityExecutionStatusChangedEventArgsHolds information relating to the change of execution status event for an Activity. This class cannot be inherited.
Public classAddedActivityActionRepresents a proposed addition of an Activity to a CompositeActivity within a running workflow instance.
Public classAlternateFlowActivityAttributeCustom attribute which indicates that the activity supports an alternative flow. This class cannot be inherited.
Public classCancellationHandlerActivityRepresents cancellation logic that can be associated with a CompositeActivity. This class cannot be inherited.
Public classCompensatableTransactionScopeActivityDefines a compensatable version of the TransactionScopeActivity activity. This class cannot be inherited.
Public classCompensateActivityTriggers the compensation of a completed child Activity that implements the ICompensatableActivity interface. This class cannot be inherited.
Public classCompensationHandlerActivitySpecifies workflow logic that undoes, or compensates for, the successful execution of the associated CompositeActivity. This class cannot be inherited.
Public classCompositeActivityDerivative of Activity that is the base class for all activities that contain other activities. A CompositeActivity is responsible for managing the execution of its child activities.
Public classDependencyObjectThe base class for all objects that have dependency properties. This class must be inherited.
Public classDependencyPropertyA special kind of property that can be defined or attached to a DependencyObject. There are three kinds of dependency properties: instance properties, meta properties, and attached properties. This class cannot be inherited.
Public classFaultHandlerActivityRepresents the activity class used to handle an Exception of the type specified by the FaultType property. This class cannot be inherited.
Public classFaultHandlersActivityRepresents a CompositeActivity that has an ordered list of child activities of type FaultHandlerActivity. This class cannot be inherited.
Public classPersistOnCloseAttributeIndicates that the current workflow instance must be persisted when the adorned activity completes its execution. This class cannot be inherited.
Public classPropertyMetadataRepresents the behavior of a dependency property.
Public classQueueEventArgsRepresents the event arguments for a workflow queue-related event.
Public classRemovedActivityActionRepresents a proposed removal of an Activity from a CompositeActivity within a running workflow instance.
Public classSuspendActivitySuspends the running workflow instance when executed. This class cannot be inherited.
Public classSynchronizationScopeActivityRepresents a section of workflow that requires controlled access to shared variables. If two or more instances of a SynchronizationScopeActivity access the same variables, then the execution of these activities is effectively serialized. This class cannot be inherited.
Public classTerminateActivityTerminates the running workflow instance when an abnormal situation occurs. This class cannot be inherited.
Public classThrowActivityModels the throwing of an exception. This class cannot be inherited.
Public classTransactionScopeActivityA section of workflow which demarcates a transaction boundary. A new Transaction is started when this Activity begins executing and the transaction commits when the Activity closes successfully. This class cannot be inherited.
Public classWorkflowChangeActionAn abstract base class from which all classes that represent proposed changes to a running workflow instance must derive.
Public classWorkflowChangesRepresents a set of proposed changes to a running workflow instance.
Public classWorkflowParameterBindingA general-purpose class that represents a binding to a named parameter. This class cannot be inherited.
Public classWorkflowParameterBindingCollectionRepresents a KeyedCollection<TKey, TItem> of type WorkflowParameterBinding. This class may not be inherited.
Public classWorkflowTerminatedExceptionRepresents the Exception that is raised when a workflow is terminated. This class cannot be inherited.
Public classWorkflowTransactionOptionsContainer for workflow transaction type options. This class cannot be inherited.

  InterfaceDescription
Public interfaceIActivityEventListener<T>Defines the interface for an object that listens for an event.
Public interfaceICompensatableActivityDefines the interface required by an Activity that can be compensated.
Public interfaceIDynamicPropertyTypeProviderProvides a property type to the bind infrastructure. It is implemented by activities that contain a property of variable type, where the type can vary depending on other activity settings.
Public interfaceIStartWorkflowDefines a service that can be obtained from an ActivityExecutionContext for the purpose of starting a new workflow instance.
Public interfaceIWorkflowChangeDiffSupports mining of workflow changes.

  DelegateDescription
Public delegateGetValueOverrideAllows a custom override of the GetValue logic associated with a dependency property that is defined on a dependency object.
Public delegateSetValueOverrideAllows a custom override of the SetValue logic associated with a dependency property that is defined on a dependency object.

  EnumerationDescription
Public enumerationActivityCollectionChangeActionRepresents an enumeration of the permissible actions which may be performed on an ActivityCollection, which typically represents the collection of all child activities of a CompositeActivity.
Public enumerationActivityExecutionResultEnumeration of activity result values that qualifies the state of an Activity that has an ActivityExecutionStatus of Closed.
Public enumerationActivityExecutionStatusEnumeration of activity status values that correspond to the life cycle of an activity within a running workflow instance.
Public enumerationDependencyPropertyOptionsRepresents an enumeration of DependencyProperty options.

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