IContractBehavior.ApplyDispatchBehavior Method

Definition

Namespace:

System.ServiceModel.Description

Assembly:

System.ServiceModel.Primitives.dll

Package:

System.ServiceModel.Primitives v8.1.0

Source:

IContractBehavior.cs

Implements a modification or extension of the client across a contract.

public:
 void ApplyDispatchBehavior(System::ServiceModel::Description::ContractDescription ^ contractDescription, System::ServiceModel::Description::ServiceEndpoint ^ endpoint, System::ServiceModel::Dispatcher::DispatchRuntime ^ dispatchRuntime);

public void ApplyDispatchBehavior (System.ServiceModel.Description.ContractDescription contractDescription, System.ServiceModel.Description.ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.DispatchRuntime dispatchRuntime);

abstract member ApplyDispatchBehavior : System.ServiceModel.Description.ContractDescription * System.ServiceModel.Description.ServiceEndpoint * System.ServiceModel.Dispatcher.DispatchRuntime -> unit

Public Sub ApplyDispatchBehavior (contractDescription As ContractDescription, endpoint As ServiceEndpoint, dispatchRuntime As DispatchRuntime)

Parameters

contractDescription

ContractDescription

The contract description to be modified.

endpoint

ServiceEndpoint

The endpoint that exposes the contract.

dispatchRuntime

DispatchRuntime

The dispatch runtime that controls service execution.

Examples

The following code example assumes a custom IInstanceProvider implementation called ObjectProviderBehavior that provides a "singleton" behavior; it always returns the same service instance and does not recycle it.

To insert the instance provider customization, the example shows how to implement a custom attribute (SingletonBehaviorAttribute) that implements IContractBehavior to insert the custom service instance provider. It also implements IContractBehaviorAttribute, which binds its use to the ISampleService contract.

public class SingletonBehaviorAttribute : Attribute, IContractBehaviorAttribute, IContractBehavior
{

  #region IContractBehaviorAttribute Members

  public Type TargetContract
  {
    get { return typeof(ISampleService); }
  }

  #endregion

  #region IContractBehavior Members

  public void AddBindingParameters(ContractDescription description, ServiceEndpoint endpoint, System.ServiceModel.Channels.BindingParameterCollection parameters)
  {
    return;
  }

  public void ApplyClientBehavior(ContractDescription description, ServiceEndpoint endpoint, ClientRuntime clientRuntime)
  {
    return;
  }

  public void ApplyDispatchBehavior(ContractDescription description, ServiceEndpoint endpoint, DispatchRuntime dispatch)
  {
    dispatch.InstanceProvider = new ObjectProviderBehavior("Custom ObjectProviderBehavior constructor.");
  }

  public void Validate(ContractDescription description, ServiceEndpoint endpoint)
  {
    return;
  }

  #endregion
}

Public Class SingletonBehaviorAttribute
    Inherits Attribute
    Implements IContractBehaviorAttribute, IContractBehavior

  #Region "IContractBehaviorAttribute Members"

  Public ReadOnly Property TargetContract() As Type Implements IContractBehaviorAttribute.TargetContract
    Get
        Return GetType(ISampleService)
    End Get
  End Property

  #End Region

  #Region "IContractBehavior Members"

  Public Sub AddBindingParameters(ByVal description As ContractDescription, ByVal endpoint As ServiceEndpoint, ByVal parameters As System.ServiceModel.Channels.BindingParameterCollection) Implements IContractBehavior.AddBindingParameters
    Return
  End Sub

  Public Sub ApplyClientBehavior(ByVal description As ContractDescription, ByVal endpoint As ServiceEndpoint, ByVal clientRuntime As ClientRuntime) Implements IContractBehavior.ApplyClientBehavior
    Return
  End Sub

  Public Sub ApplyDispatchBehavior(ByVal description As ContractDescription, ByVal endpoint As ServiceEndpoint, ByVal dispatch As DispatchRuntime) Implements IContractBehavior.ApplyDispatchBehavior
    dispatch.InstanceProvider = New ObjectProviderBehavior("Custom ObjectProviderBehavior constructor.")
  End Sub

  Public Sub Validate(ByVal description As ContractDescription, ByVal endpoint As ServiceEndpoint) Implements IContractBehavior.Validate
    Return
  End Sub

  #End Region
End Class

Remarks

Implement the ApplyDispatchBehavior to view, modify, or add custom extensions to the service runtime across all messages in a specific contract or for one specific operation in that contract. For details about what customizations you can perform in a service application, see DispatchRuntime and DispatchOperation.

The ApplyDispatchBehavior method can throw a NotImplementedException exception if the behavior is only intended for use in a client application.

This method is called once for each endpoint that uses the specified service contract.

Note that there can be two operations with the same name in the description (one in each direction), so if you must iterate through operations where the contract is a duplex contract, you must correlate the message direction between the endpoint DispatchRuntime and that returned by the CallbackClientRuntime property.

In addition, because other behaviors may have already added or removed some operations from the runtime, there is no guarantee that there are the same number of operations in description as there are DispatchOperation objects in the Operations property.