.NET Framework Class Library
InterfaceQueuingAttribute Class

Enables queuing support for the marked interface. This class cannot be inherited.

Inheritance Hierarchy
SystemObject
   SystemAttribute
    System.EnterpriseServicesInterfaceQueuingAttribute

Namespace:   System.EnterpriseServices
Assembly:  System.EnterpriseServices (in System.EnterpriseServices.dll)
Syntax
<[%$TOPIC/yc815w90_en-us_VS_110_2_0_0_0_0%]([%$TOPIC/yc815w90_en-us_VS_110_2_0_0_0_1%].Class Or [%$TOPIC/yc815w90_en-us_VS_110_2_0_0_0_2%].Interface, Inherited := True,  _
	AllowMultiple := True)> _
<[%$TOPIC/yc815w90_en-us_VS_110_2_0_0_0_3%](False)> _
Public NotInheritable Class InterfaceQueuingAttribute _
	Inherits [%$TOPIC/yc815w90_en-us_VS_110_2_0_0_0_4%]
[[%$TOPIC/yc815w90_en-us_VS_110_2_0_1_0_0%]([%$TOPIC/yc815w90_en-us_VS_110_2_0_1_0_1%].Class|[%$TOPIC/yc815w90_en-us_VS_110_2_0_1_0_2%].Interface, Inherited = true, 
	AllowMultiple = true)]
[[%$TOPIC/yc815w90_en-us_VS_110_2_0_1_0_3%](false)]
public sealed class InterfaceQueuingAttribute : [%$TOPIC/yc815w90_en-us_VS_110_2_0_1_0_4%]
[[%$TOPIC/yc815w90_en-us_VS_110_2_0_2_0_0%]([%$TOPIC/yc815w90_en-us_VS_110_2_0_2_0_1%]::Class|[%$TOPIC/yc815w90_en-us_VS_110_2_0_2_0_2%]::Interface, Inherited = true, 
	AllowMultiple = true)]
[[%$TOPIC/yc815w90_en-us_VS_110_2_0_2_0_3%](false)]
public ref class InterfaceQueuingAttribute sealed : public [%$TOPIC/yc815w90_en-us_VS_110_2_0_2_0_4%]
[<[%$TOPIC/yc815w90_en-us_VS_110_2_0_3_0_0%]>]
[<[%$TOPIC/yc815w90_en-us_VS_110_2_0_3_0_1%]([%$TOPIC/yc815w90_en-us_VS_110_2_0_3_0_2%].Class|[%$TOPIC/yc815w90_en-us_VS_110_2_0_3_0_3%].Interface, Inherited = true, 
    AllowMultiple = true)>]
[<[%$TOPIC/yc815w90_en-us_VS_110_2_0_3_0_4%](false)>]
type InterfaceQueuingAttribute =  
    class 
        inherit [%$TOPIC/yc815w90_en-us_VS_110_2_0_3_0_5%] 
    end
public final class InterfaceQueuingAttribute extends [%$TOPIC/yc815w90_en-us_VS_110_2_0_4_0_0%]

The InterfaceQueuingAttribute type exposes the following members.

Constructors
  NameDescription
Public method InterfaceQueuingAttributeInitializes a new instance of the InterfaceQueuingAttribute class setting the Enabled and Interface properties to their default values.
Public method InterfaceQueuingAttribute(Boolean)Initializes a new instance of the InterfaceQueuingAttribute class, optionally disabling queuing support.
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Properties
  NameDescription
Public property EnabledGets or sets a value indicating whether queuing support is enabled.
Public property InterfaceGets or sets the name of the interface on which queuing is enabled.
Public property TypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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Methods
  NameDescription
Public method EqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Public method GetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public method GetTypeGets the Type of the current instance. (Inherited from Object.)
Public method IsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public method MatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Public method ToStringReturns a string that represents the current object. (Inherited from Object.)
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Explicit Interface Implementations
  NameDescription
Explicit interface implemetation Private method _AttributeGetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeGetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeGetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeInvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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Remarks

Calls on this interface will be queued using Message Queuing.

To mark an interface as queued, apply this attribute to the interface using the following syntax: [InterfaceQueuing].

The member methods of a queued interface must fulfill the requirements for queued method calls, such as having no out or ref parameters.

For more information about using attributes, see Extending Metadata Using Attributes.

Examples

The following code example shows how to use the InterfaceQueuingAttribute attribute.

public interface IQueuedComponent
{
    void QueuedTask();
}
// Mark IQueuedComponent interface as queued
[InterfaceQueuing(true, Interface="IQueuedComponent")]
// Create the queued component class by inheriting the  
// System.EnterpriseServices.ServicedComponent class and an 
// interface that is marked as queued with the InterfaceQueuing attribute 
public class QueuedComponent : ServicedComponent, IQueuedComponent
{
    public void QueuedTask()
    {
        // Perform queued task here
    }
}
public interface class IQueuedComponent
{
   void QueuedTask();
};


// Mark IQueuedComponent interface as queued 
// Create the queued component class by inheriting the  
// System.EnterpriseServices.ServicedComponent class and an 
// interface that is marked as queued with the InterfaceQueuing attribute

[InterfaceQueuing(true,Interface="IQueuedComponent")]
public ref class QueuedComponent sealed: public ServicedComponent, public IQueuedComponent
{
public:
   virtual void QueuedTask()
   {
      // Perform queued task here
   }

};

The following code example shows how to mark a COM+ application as queued at compile time by using the ApplicationQueuing attribute, and enable the COM+ listener by setting the QueueListenerEnabled to true

// Mark the COM+ application as queued at compile time by using the  
// ApplicationQueuing attribute. Enable the COM+ listener by  
// setting the QueueListenerEnabled to true
[assembly: ApplicationQueuing(Enabled=true, QueueListenerEnabled=true)]
// Mark the COM+ application as queued at compile time by using the  
// ApplicationQueuing attribute. Enable the COM+ listener by  
// setting the QueueListenerEnabled to true
[assembly:ApplicationQueuing(Enabled=true,QueueListenerEnabled=true)];

The following code example shows how to use BindToMoniker to run the queued moniker, to get an instance of the recorder, call the method that will be recorded, and force the release of the recorder object, to send the message to the queue.

// Use BindToMoniker to run the queued moniker, to get an instance of the recorder
IQueuedComponent qc = 
    (IQueuedComponent)System.Runtime.InteropServices.Marshal.BindToMoniker("queue:/new:QueuedComponent");
// Call the method that will be recorded
qc.QueuedTask();

// Force the release of the recorder object, to send the message to the queue
System.Runtime.InteropServices.Marshal.ReleaseComObject(qc);
// Use BindToMoniker to run the queued moniker, to get an instance of the recorder
IQueuedComponent ^ qc = dynamic_cast<IQueuedComponent^>(System::Runtime::InteropServices::Marshal::BindToMoniker( "queue:/new:QueuedComponent" ));

// Call the method that will be recorded
qc->QueuedTask();

// Force the release of the recorder object, to send the message to the queue
System::Runtime::InteropServices::Marshal::ReleaseComObject( qc );
Version Information

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.