VB.NET MessageQueue.BeginPeek方法代码示例

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本文整理汇总了VB.NET中System.Messaging.MessageQueue.BeginPeek方法的典型用法代码示例。如果您正苦于以下问题：VB.NET MessageQueue.BeginPeek方法的具体用法？VB.NET MessageQueue.BeginPeek怎么用？VB.NET MessageQueue.BeginPeek使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Messaging.MessageQueue的用法示例。

在下文中一共展示了MessageQueue.BeginPeek方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。

示例1: MyNewQueue

' 导入命名空间
Imports System.Messaging


   
' Provides a container class for the example.

Public Class MyNewQueue

        ' Represents a state object associated with each message.
        Private Shared messageNumber As Integer = 0



        ' Provides an entry point into the application.
        '		 
        ' This example performs asynchronous peek operation
        ' processing.


        Public Shared Sub Main()
            ' Create an instance of MessageQueue. Set its formatter.
            Dim myQueue As New MessageQueue(".\myQueue")
            myQueue.Formatter = New XmlMessageFormatter(New Type() _
                {GetType([String])})

            ' Add an event handler for the PeekCompleted event.
            AddHandler myQueue.PeekCompleted, AddressOf _
                MyPeekCompleted

            ' Begin the asynchronous peek operation with a time-out 
            ' of one minute.
            myQueue.BeginPeek(New TimeSpan(0, 1, 0), messageNumber)
            messageNumber += 1

            ' Do other work on the current thread.
            Return
        End Sub



        ' Provides an event handler for the PeekCompleted
        ' event.


        Private Shared Sub MyPeekCompleted(ByVal [source] As _
            [Object], ByVal asyncResult As _
            PeekCompletedEventArgs)

            Try
                ' Connect to the queue.
                Dim mq As MessageQueue = _
                    CType([source], MessageQueue)

                ' End the asynchronous peek operation.
                Dim m As Message = _
                    mq.EndPeek(asyncResult.AsyncResult)

                ' Display message information on the screen, 
                ' including(the) message number (state object).
                Console.WriteLine(("Message: " + _
                    CInt(asyncResult.AsyncResult.AsyncState) + _
                    " " + CStr(m.Body)))

                ' Restart the asynchronous peek operation, with the 
                ' same time-out.
                mq.BeginPeek(New TimeSpan(0, 1, 0), messageNumber)
                messageNumber += 1


            Catch e As MessageQueueException

                If e.MessageQueueErrorCode = _
                    MessageQueueErrorCode.IOTimeout Then

                    Console.WriteLine(e.ToString())

                    ' Handle other sources of MessageQueueException.

                End If

                ' Handle other exceptions.

            End Try

            Return

        End Sub

End Class

开发者ID:VB.NET开发者，项目名称:System.Messaging，代码行数:90，代码来源:MessageQueue.BeginPeek

示例2: MyNewQueue

' 导入命名空间
Imports System.Messaging





' Provides a container class for the example.
Public Class MyNewQueue



        ' Provides an entry point into the application.
        '		 
        ' This example performs asynchronous peek operation
        ' processing.


        Public Shared Sub Main()
            ' Create an instance of MessageQueue. Set its formatter.
            Dim myQueue As New MessageQueue(".\myQueue")
            myQueue.Formatter = New XmlMessageFormatter(New Type() _
                {GetType([String])})

            ' Add an event handler for the PeekCompleted event.
            AddHandler myQueue.PeekCompleted, AddressOf _
                MyPeekCompleted

            ' Begin the asynchronous peek operation.
            myQueue.BeginPeek()

            ' Do other work on the current thread.
            Return
        End Sub


        '**************************************************
        ' Provides an event handler for the PeekCompleted
        ' event.
        '**************************************************

        Private Shared Sub MyPeekCompleted(ByVal [source] As _
            [Object], ByVal asyncResult As PeekCompletedEventArgs)

            ' Connect to the queue.
            Dim mq As MessageQueue = CType([source], MessageQueue)

            ' End the asynchronous peek operation.
            Dim m As Message = mq.EndPeek(asyncResult.AsyncResult)

            ' Display message information on the screen.
            Console.WriteLine(("Message: " + CStr(m.Body)))

            ' Restart the asynchronous peek operation.
            mq.BeginPeek()

            Return

        End Sub

End Class

开发者ID:VB.NET开发者，项目名称:System.Messaging，代码行数:61，代码来源:MessageQueue.BeginPeek

示例3: MyNewQueue

' 导入命名空间
Imports System.Messaging


' Provides a container class for the example.
Public Class MyNewQueue



        ' Provides an entry point into the application.
        '		 
        ' This example performs asynchronous peek operation
        ' processing.


        Public Shared Sub Main()
            ' Create an instance of MessageQueue. Set its formatter.
            Dim myQueue As New MessageQueue(".\myQueue")
            myQueue.Formatter = New XmlMessageFormatter(New Type() _
                    {GetType([String])})

            ' Add an event handler for the PeekCompleted event.
            AddHandler myQueue.PeekCompleted, _
                    AddressOf MyPeekCompleted

            ' Begin the asynchronous peek operation with a time-out 
            ' of one minute.
            myQueue.BeginPeek(New TimeSpan(0, 1, 0))

            ' Do other work on the current thread.
            Return

        End Sub



        ' Provides an event handler for the PeekCompleted
        ' event.


        Private Shared Sub MyPeekCompleted(ByVal [source] As _
            [Object], ByVal asyncResult As _
            PeekCompletedEventArgs)

            Try
                ' Connect to the queue.
                Dim mq As MessageQueue = CType([source], _
                    MessageQueue)

                ' End the asynchronous peek operation.
                Dim m As Message = _
                    mq.EndPeek(asyncResult.AsyncResult)

                ' Display message information on the screen.
                Console.WriteLine(("Message: " + CStr(m.Body)))

                ' Restart the asynchronous peek operation, with the 
                ' same time-out.
                mq.BeginPeek(New TimeSpan(0, 1, 0))

            Catch e As MessageQueueException

                If e.MessageQueueErrorCode = _
                    MessageQueueErrorCode.IOTimeout Then

                    Console.WriteLine(e.ToString())

                    ' Handle other sources of MessageQueueException.
                End If

                ' Handle other exceptions.

            End Try

            Return

        End Sub

End Class

开发者ID:VB.NET开发者，项目名称:System.Messaging，代码行数:79，代码来源:MessageQueue.BeginPeek

注：本文中的System.Messaging.MessageQueue.BeginPeek方法示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。