MessageQueueException 类

定义

public ref class MessageQueueException : System::Runtime::InteropServices::ExternalException

[System.Serializable]
public class MessageQueueException : System.Runtime.InteropServices.ExternalException

[<System.Serializable>]
type MessageQueueException = class
    inherit ExternalException
    interface ISerializable

Public Class MessageQueueException
Inherits ExternalException

继承

Object

Exception

SystemException

ExternalException

MessageQueueException

属性

SerializableAttribute

实现

ISerializable

示例

#using <system.dll>
#using <system.messaging.dll>

using namespace System;
using namespace System::Messaging;
int main()
{
   
   // Determine whether the queue exists.
   if ( MessageQueue::Exists( ".\\myQueue" ) )
   {
      try
      {
         
         // Delete the queue.
         MessageQueue::Delete( ".\\myQueue" );
      }
      catch ( MessageQueueException^ e ) 
      {
         if ( e->MessageQueueErrorCode == MessageQueueErrorCode::AccessDenied )
         {
            Console::WriteLine( "Access is denied. Queue might be a system queue." );
         }
         
         // Handle other sources of MessageQueueException.
      }

   }

   return 0;
}

using System;
using System.Messaging;

namespace MyProject
{
    /// <summary>
    /// Provides a container class for the example.
    /// </summary>
    public class MyNewQueue
    {

        //**************************************************
        // Provides an entry point into the application.
        //		
        // This example verifies existence and attempts to
        // delete a queue.
        //**************************************************

        public static void Main()
        {

            // Determine whether the queue exists.
            if (MessageQueue.Exists(".\\myQueue"))
            {
                try
                {
                    // Delete the queue.
                    MessageQueue.Delete(".\\myQueue");
                }
                catch(MessageQueueException e)
                {
                    if(e.MessageQueueErrorCode ==
                        MessageQueueErrorCode.AccessDenied)
                    {
                        Console.WriteLine("Access is denied. " +
                            "Queue might be a system queue.");
                    }

                    // Handle other sources of MessageQueueException.
                }
            }
        
            return;
        }
    }
}

Imports System.Messaging



Public Class MyNewQueue


        
        ' Provides an entry point into the application.
        '		 
        ' This example verifies existence and attempts to 
        ' delete a queue.
        

        Public Shared Sub Main()

            ' Determine whether the queue exists.
            If MessageQueue.Exists(".\myQueue") Then

                Try

                    ' Delete the queue.
                    MessageQueue.Delete(".\myQueue")

                Catch e As MessageQueueException

                    If e.MessageQueueErrorCode = _
                        MessageQueueErrorCode.AccessDenied Then

                        Console.WriteLine("Access is denied. " _
                            + "Queue might be a system queue.")
                    End If

                    ' Handle other sources of exceptions as necessary.

                End Try

            End If


            Return

        End Sub

End Class

注解

与 MessageQueueException 类关联的异常是由消息队列中的内部错误生成的，应通过代码处理这些错误。

每个异常都包含一个错误代码和一个描述错误来源的文本字符串。 MessageQueueErrorCode有关这些错误代码及其说明的列表，请参阅 类。

如果 MessageQueue 在 sharedModeDenyReceive 参数设置为 true 的情况下打开一个队列，则随后尝试从该队列中进行读取的任何 MessageQueue 都会由于共享冲突而生成 MessageQueueException 异常。 如果一个 MessageQueue 尝试以独占模式访问队列，而此时另一个 MessageQueue 已经以非独占方式访问该队列，则引发与此相同的异常。

不支持警报标记!!!
MessageQueueTransaction 是线程单元感知。 Visual Basic 将main线程的状态设置为 STA，因此必须在子例程中Main应用 MTAThreadAttribute 。 否则，利用另一个线程发送事务性消息将引发 MessageQueueException 异常。

构造函数

属性

方法

事件

适用于

另请参阅

• MessageQueueErrorCode
• MessageQueue
• Message