本文整理匯總了VB.NET中System.Messaging.MessageQueue.BeginPeek方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET MessageQueue.BeginPeek方法的具體用法？VB.NET MessageQueue.BeginPeek怎麽用？VB.NET MessageQueue.BeginPeek使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Messaging.MessageQueue的用法示例。
在下文中一共展示了MessageQueue.BeginPeek方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: MyNewQueue
' 導入命名空間
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示例2: MyNewQueue
' 導入命名空間
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示例3: MyNewQueue
' 導入命名空間
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