本文整理汇总了VB.NET中System.Management.ManagementOperationObserver.ManagementOperationObserver构造函数的典型用法代码示例。如果您正苦于以下问题：VB.NET ManagementOperationObserver构造函数的具体用法？VB.NET ManagementOperationObserver怎么用？VB.NET ManagementOperationObserver使用的例子？那么, 这里精选的构造函数代码示例或许可以为您提供帮助。您也可以进一步了解该构造函数所在类System.Management.ManagementOperationObserver的用法示例。
在下文中一共展示了ManagementOperationObserver构造函数的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: EnumerateInstancesAsync
' 导入命名空间
Imports System.Management
' This example demonstrates how
' to perform an asynchronous instance enumeration.
Public Class EnumerateInstancesAsync
Public Sub New()
Me.isCompleted = False
' Enumerate asynchronously using Object Searcher
' ===============================================
' Instantiate an object searcher with the query
Dim searcher As ManagementObjectSearcher
searcher = New ManagementObjectSearcher( _
New SelectQuery("Win32_Service"))
' Create a results watcher object,
' and handler for results and completion
Dim results As ManagementOperationObserver
results = New ManagementOperationObserver
' Attach handler to events for
' results and completion
AddHandler results.ObjectReady, _
AddressOf Me.NewObject
AddHandler results.Completed, _
AddressOf Me.Done
' Call the asynchronous overload of
' Get() to start the enumeration
searcher.Get(results)
' Do something else while results
' arrive(asynchronously)
Do While (Me.Completed.Equals(False))
System.Threading.Thread.Sleep(1000)
Loop
Me.Reset()
End Sub
Private isCompleted As Boolean
Private Sub NewObject(ByVal sender As Object, _
ByVal e As ObjectReadyEventArgs)
Console.WriteLine("Service : {0}, State = {1}", _
e.NewObject("Name"), e.NewObject("State"))
End Sub
Private ReadOnly Property Completed() As Boolean
Get
Return isCompleted
End Get
End Property
Private Sub Reset()
isCompleted = False
End Sub
Private Sub Done(ByVal sender As Object, _
ByVal e As CompletedEventArgs)
isCompleted = True
End Sub
Public Shared Function _
Main(ByVal args() As String) As Integer
Dim example As New EnumerateInstancesAsync
Return 0
End Function
End Class