ClientOperation Class


Used to modify or extend the execution behavior of a specific contract operation in a client object or client channel object. This class cannot be inherited.

public ref class ClientOperation sealed
public sealed class ClientOperation
type ClientOperation = class
Public NotInheritable Class ClientOperation


The following code example shows an System.ServiceModel.Description.IEndpointBehavior inserting a custom parameter inspector into each ClientOperation in the ClientRuntime.Operations property.

#region IEndpointBehavior Members
public void AddBindingParameters(
  ServiceEndpoint endpoint, BindingParameterCollection bindingParameters
) { return; }

public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
  clientRuntime.MessageInspectors.Add(new Inspector());
  foreach (ClientOperation op in clientRuntime.Operations)
    op.ParameterInspectors.Add(new Inspector());

public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
  endpointDispatcher.DispatchRuntime.MessageInspectors.Add(new Inspector());
  foreach (DispatchOperation op in endpointDispatcher.DispatchRuntime.Operations)
    op.ParameterInspectors.Add(new Inspector());

public void Validate(ServiceEndpoint endpoint){ return; }
#Region "IEndpointBehavior Members"
    Public Sub AddBindingParameters(ByVal endpoint As ServiceEndpoint, ByVal bindingParameters _
                                    As BindingParameterCollection) Implements IEndpointBehavior.AddBindingParameters
    End Sub

    Public Sub ApplyClientBehavior(ByVal endpoint As ServiceEndpoint, ByVal clientRuntime As ClientRuntime) _
    Implements IEndpointBehavior.ApplyClientBehavior
        clientRuntime.MessageInspectors.Add(New Inspector())
        For Each op As ClientOperation In clientRuntime.Operations
            op.ParameterInspectors.Add(New Inspector())
        Next op
    End Sub

    Public Sub ApplyDispatchBehavior(ByVal endpoint As ServiceEndpoint, ByVal endpointDispatcher As  _
                                     EndpointDispatcher) Implements IEndpointBehavior.ApplyDispatchBehavior
        endpointDispatcher.DispatchRuntime.MessageInspectors.Add(New Inspector())
        For Each op As DispatchOperation In endpointDispatcher.DispatchRuntime.Operations
            op.ParameterInspectors.Add(New Inspector())
        Next op
    End Sub

Public Sub Validate(ByVal endpoint As ServiceEndpoint) Implements IEndpointBehavior.Validate
End Sub


The ClientOperation class is the location for client run-time modifications and insertion point for custom extensions that are scoped to only one service operation. (To modify client run-time behavior for all messages in a contract, use the ClientRuntime class. )

Install ClientOperation modifications using a custom client behavior object, either of type IContractBehavior (to find a particular operation to modify) or of type IOperationBehavior (which can then be applied by creating a custom attribute).

Use the Operations property to locate the ClientOperation object that represents a particular service operation.

For more information about clients and the client architecture, see Accessing Services Using a WCF Client and WCF Client Architecture. For more information about customizing the client runtime, see Extending Clients. For more information about using behaviors, see Configuring and Extending the Runtime with Behaviors.

The following properties enable you to insert custom objects or modify the client execution behavior:

  • Use the Formatter property to insert a custom IClientMessageFormatter implementation for an operation or modify the current formatter.

  • Use the ParameterInspectors property to insert a custom IParameterInspector implementation or to modify the current one.

  • Use the SerializeRequest property to control who serializes an outbound message.

  • Use the DeserializeReply property to control who deserializes an inbound message.

  • Use the Action property to access the WS-Addressing action of the request message and the ReplyAction property to access the response message action.

  • Use the BeginMethod and EndMethod to specify which client methods are associated with an asynchronous operation.

  • Use the FaultContractInfos property to get a collection of specified types that can appear in SOAP faults as the detail type.

  • Use the IsInitiating and IsTerminating properties to control whether a session is initiated or is torn down, respectively, when the operation is called.

  • Use the IsOneWay property to control whether the client waits for a response before completing the invocation.

  • Use the Parent property to obtain the containing ClientRuntime object.

  • Use the Name property to get the name of the operation.

  • Use the SyncMethod property to control which method is mapped to the operation.


ClientOperation(ClientRuntime, String, String)

Initializes a new instance of the ClientOperation class using the specified ClientRuntime, name, and action values.

ClientOperation(ClientRuntime, String, String, String)

Initializes a new instance of the ClientOperation class using the specified ClientRuntime, name, action, and reply action values.



Gets the action of the operation.


Gets or sets the method associated with an asynchronous operation.


Gets a collection of parameter inspector objects used to view or modify parameters prior to or subsequent to a client call.


Gets or sets a value that indicates whether the Formatter property value is used to deserialize the reply message.


Gets or sets the method that implements the asynchronous end method for the operation.


Gets a collection of FaultContractInfo objects that represent the specified SOAP faults for this operation.


Gets or sets the formatter that serializes objects into messages and deserializes messages into objects.


Gets or sets a value that indicates whether a session can be started by a message to this operation.


Gets or sets a value that indicates if the operation is a one-way operation.


Gets or sets a value that indicates if this operation is the last one in a session.


Gets the name of the operation.


Gets or sets a collection of IParameterInspector objects that can inspect and modify inbound and outbound objects for a particular client method.


Gets the containing ClientRuntime object.


Gets the action of the reply message for this operation.


Gets or sets a value that specifies whether the Formatter object serializes an outbound message.


Gets or sets the method that is associated with this operation.


Gets or sets the method associated with a task.


Gets or sets the type of the result of the method that is associated with a task.



Determines whether the specified object is equal to the current object.

(Inherited from Object)

Serves as the default hash function.

(Inherited from Object)

Gets the Type of the current instance.

(Inherited from Object)

Creates a shallow copy of the current Object.

(Inherited from Object)

Returns a string that represents the current object.

(Inherited from Object)

Applies to