System.ServiceModel.Activities Namespace

The System.ServiceModel.Activities namespace contains classes that allow you to send messages to and receive messages from workflows. These activities are used when writing workflow services and allow you to define how messages are sent and received in a workflow.

  ClassDescription
Public classCallbackCorrelationInitializerInitializes the associated CorrelationHandle with a callback correlation.
Public classChannelCacheSettingsRepresents settings that define operational characteristics of a channel cache.
Public classContextCorrelationInitializerInitializes the associated CorrelationHandle with a.NET Context Exchange-based correlation, subject to the ContextExchangeMechanism specified.
Public classCorrelationHandleAssociates activities together in a correlation by representing a particular shared InstanceKey or transient context in the workflow.
Public classCorrelationInitializerAn abstract base class for correlation initializers that are used to tell the runtime what protocol is being used for the correlation.
Public classCorrelationScopeProvides implicit CorrelationHandle management for child messaging activities.
Public classDurableInstancingOptionsUsed mainly to associate a concrete implementation of the InstanceStore such as SqlWorkflowInstanceStore with a workflow service host. This class is also used to add instance owner metadata.
Public classHostSettingsRepresents settings that define operational characteristics of a host.
Public classInitializeCorrelationInitializes correlation without sending or receiving a message.
Public classMessageContextRepresents a message context.
Public classQueryCorrelationInitializerInitializes the associated CorrelationHandle based on the results of the MessageQuerySet when the message is sent or received.
Public classReceiveAn activity that receives a message.
Public classReceiveContentAn abstract base class for classes that represent the data received by a workflow service.
Public classReceiveMessageContentA class used to receive a Message or a message contract type within a workflow service.
Public classReceiveParametersContentEnables a workflow service to receive data n the form of parameters.ReceiveParametersContent is interoperable with non-workflow WCF clients and services. The Parameters collection is similar to the argument declaration on a C# method signature.The Parameters collection cannot contain arguments marked with MessageContractAttribute, or of type [System.ServiceModel.Channels.Message]. Please use ReceiveMessageContent for these types of data.This is a sealed class.
Public classReceiveReplyAn activity that receives a message as part of a request/reply message exchange pattern.
Public classReceiveSettingsSettings for an activity that receives a message.
Public classRequestReplyCorrelationInitializerInitializes the associated CorrelationHandle based on the RequestContext that is created for the two-way operation.
Public classSendAn activity that sends a message to a service.
Public classSendContentAn abstract base class for classes that represent the data sent to a workflow service.
Public classSendMessageChannelCacheRepresents an extension that enables the customization of the cache sharing levels, the settings of the channel factory cache, and the settings of the channel cache for workflows that send messages to service endpoints using Send messaging activities.
Public classSendMessageContentA class used to send a single item (message) to or from a workflow service. The item can be a built-in type such as primitive types, Message, or XElement; or an application-defined data contract, message contract, or XML serializable type.
Public classSendParametersContentEnables sending data to or from a workflow service in the form of parameters.
Public classSendReceiveExtensionAn abstract class that defines extension methods for the send/receive activities.
Public classSendReplyAn activity that sends the reply message as part of a request/response message exchange pattern on the service side.
Public classSendSettingsSettings for an activity that sends a message.
Public classTransactedReceiveScopeAn activity which scopes the lifetime of a transaction which is initiated by a received message. The transaction may be flowed into the workflow on the initiating message, or be created by the dispatcher when the message is received.
Public classWorkflowControlClientAllows a client to send control operations to a workflow service hosted with WorkflowServiceHost.
Public classWorkflowControlEndpointA standard endpoint that enables you to call control operations on workflow instances.
Public classWorkflowCreationContextRepresents a context that is set up during workflow activation using the workflow hosting endpoint to handle arguments, and receive workflow completion notifications.
Public classWorkflowHostingEndpointAn abstract implementation of ServiceEndpoint. Derive from this class to expose contracts that support workflow creation and bookmark resumption.
Public classWorkflowHostingResponseContextThis class is used in conjunction with the WorkflowHostingEndpoint class. It is used for sending the response for a request/reply contract supported by a WorkflowHostingEndpoint implementation.
Public classWorkflowServiceEnables you to create, configure, and access the properties of a workflow service.
Public classWorkflowServiceHostProvides a host for workflows. Supports features like messaging activities, multi-instancing, and configuration.

  InterfaceDescription
Public interfaceIReceiveMessageCallbackImplements a callback to be executed when a service message is received by the Receive and ReceiveParameters activities.
Public interfaceISendMessageCallbackAn interface that implements a callback that is called just before a message is sent on the wire by the Send or SendParameters activities.
Public interfaceIWorkflowInstanceManagementRepresents a service contract that defines a set of operations that allow you to control workflow instances.

  EnumerationDescription
Public enumerationSerializerOptionA class that represents the types of serializers available.
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