本文整理汇总了VB.NET中System.Messaging.Acknowledgment枚举的典型用法代码示例。如果您正苦于以下问题:VB.NET Acknowledgment枚举的具体用法?VB.NET Acknowledgment怎么用?VB.NET Acknowledgment使用的例子?那么恭喜您, 这里精选的枚举代码示例或许可以为您提供帮助。
在下文中一共展示了Acknowledgment枚举的1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
' Provides an entry point into the application.
' This example sends and receives a message from
' a queue.
Public Shared Sub Main()
' Create a new instance of the class.
Dim myNewQueue As New MyNewQueue()
' Create new queues.
CreateQueue(".\myQueue")
CreateQueue(".\myAdministrationQueue")
' Send messages to a queue.
myNewQueue.SendMessage()
' Receive messages from a queue.
Dim messageId As String = myNewQueue.ReceiveMessage()
' Receive acknowledgment message.
If Not (messageId Is Nothing) Then
myNewQueue.ReceiveAcknowledgment(messageId, ".\myAdministrationQueue")
End If
Return
End Sub
' Creates a new queue.
Public Shared Sub CreateQueue(queuePath As String)
Try
If Not MessageQueue.Exists(queuePath) Then
MessageQueue.Create(queuePath)
Else
Console.WriteLine((queuePath + " already exists."))
End If
Catch e As MessageQueueException
Console.WriteLine(e.Message)
End Try
End Sub
' Sends a string message to a queue.
Public Sub SendMessage()
' Connect to a queue on the local computer.
Dim myQueue As New MessageQueue(".\myQueue")
' Create a new message.
Dim myMessage As New Message("Original Message")
myMessage.AdministrationQueue = New MessageQueue(".\myAdministrationQueue")
myMessage.AcknowledgeType = AcknowledgeTypes.PositiveReceive Or AcknowledgeTypes.PositiveArrival
' Send the Order to the queue.
myQueue.Send(myMessage)
Return
End Sub
' Receives a message containing an Order.
Public Function ReceiveMessage() As String
' Connect to the a queue on the local computer.
Dim myQueue As New MessageQueue(".\myQueue")
myQueue.MessageReadPropertyFilter.CorrelationId = True
' Set the formatter to indicate body contains an Order.
myQueue.Formatter = New XmlMessageFormatter(New Type() {GetType(String)})
Dim returnString As String = Nothing
Try
' Receive and format the message.
Dim myMessage As Message = myQueue.Receive()
' Display message information.
Console.WriteLine("____________________________________________")
Console.WriteLine("Original message information--")
Console.WriteLine(("Body: " + myMessage.Body.ToString()))
Console.WriteLine(("Id: " + myMessage.Id.ToString()))
Console.WriteLine("____________________________________________")
returnString = myMessage.Id
' Handle invalid serialization format.
Catch e As InvalidOperationException
Console.WriteLine(e.Message)
End Try
' Catch other exceptions as necessary.
Return returnString
End Function 'ReceiveMessage
' Receives a message containing an Order.
Public Sub ReceiveAcknowledgment(messageId As String, queuePath As String)
Dim found As Boolean = False
Dim queue As New MessageQueue(queuePath)
queue.MessageReadPropertyFilter.CorrelationId = True
queue.MessageReadPropertyFilter.Acknowledgment = True
Try
While Not (queue.PeekByCorrelationId(messageId) Is Nothing)
Dim myAcknowledgmentMessage As Message = queue.ReceiveByCorrelationId(messageId)
' Output acknowledgment message information. The correlation Id is identical
' to the id of the original message.
Console.WriteLine("Acknowledgment Message Information--")
Console.WriteLine(("Correlation Id: " + myAcknowledgmentMessage.CorrelationId.ToString()))
Console.WriteLine(("Id: " + myAcknowledgmentMessage.Id.ToString()))
Console.WriteLine(("Acknowledgment Type: " + myAcknowledgmentMessage.Acknowledgment.ToString()))
Console.WriteLine("____________________________________________")
found = True
End While
Catch e As InvalidOperationException
' This exception would be thrown if there is no (further) acknowledgment message
' with the specified correlation Id. Only output a message if there are no messages;
' not if the loop has found at least one.
If found = False Then
Console.WriteLine(e.Message)
End If
End Try
End Sub
End Class