InterfaceQueuingAttribute 类

定义

public ref class InterfaceQueuingAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Interface, AllowMultiple=true, Inherited=true)]
[System.Runtime.InteropServices.ComVisible(false)]
public sealed class InterfaceQueuingAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Interface, AllowMultiple=true, Inherited=true)>]
[<System.Runtime.InteropServices.ComVisible(false)>]
type InterfaceQueuingAttribute = class
    inherit Attribute

Public NotInheritable Class InterfaceQueuingAttribute
Inherits Attribute

继承

Object

Attribute

InterfaceQueuingAttribute

属性

AttributeUsageAttribute ComVisibleAttribute

示例

下面的代码示例演示如何使用 InterfaceQueuingAttribute 特性。

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
   }

};

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
    }
}

下面的代码示例演示如何使用 ApplicationQueuing 特性在编译时将 COM+ 应用程序标记为已排队，并通过将 设置为 QueueListenerEnabled true 来启用 COM+ 侦听器

// 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)]

下面的代码示例演示如何使用 BindToMoniker 运行排队名字对象，获取记录器的实例，调用将记录的方法，并强制释放记录器对象，以将消息发送到队列。

// 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 );

// 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);

注解

此接口上的调用将使用消息队列排队。

若要将接口标记为已排队，请使用以下语法将此属性应用于接口： [InterfaceQueuing]。

排队接口的成员方法必须满足排队方法调用的要求，例如没有 out 或 ref 参数。

有关使用特性的详细信息，请参阅 特性。

构造函数

属性

方法

显式接口实现

适用于