ManagementOperationObserver Kelas
Definisi
Penting
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Mengelola operasi asinkron dan menangani informasi manajemen dan peristiwa yang diterima secara asinkron.
public ref class ManagementOperationObserver
public class ManagementOperationObserver
type ManagementOperationObserver = class
Public Class ManagementOperationObserver
- Warisan
-
ManagementOperationObserver
Contoh
Contoh berikut menunjukkan cara melakukan enumerasi instans asinkron. Contohnya menggunakan ManagementOperationObserver kelas untuk menangani informasi manajemen dan peristiwa secara asinkron.
using System;
using System.Management;
// This example demonstrates how
// to perform an asynchronous instance enumeration.
public class EnumerateInstancesAsync
{
public EnumerateInstancesAsync()
{
// Enumerate asynchronously using Object Searcher
// ===============================================
// Instantiate an object searcher with the query
ManagementObjectSearcher searcher =
new ManagementObjectSearcher(new
SelectQuery("Win32_Service"));
// Create a results watcher object,
// and handler for results and completion
ManagementOperationObserver results = new
ManagementOperationObserver();
// Attach handler to events for results and completion
results.ObjectReady += new
ObjectReadyEventHandler(this.NewObject);
results.Completed += new
CompletedEventHandler(this.Done);
// Call the asynchronous overload of Get()
// to start the enumeration
searcher.Get(results);
// Do something else while results
// arrive asynchronously
while (!this.Completed)
{
System.Threading.Thread.Sleep (1000);
}
this.Reset();
}
private bool isCompleted = false;
private void NewObject(object sender,
ObjectReadyEventArgs obj)
{
Console.WriteLine("Service : {0}, State = {1}",
obj.NewObject["Name"],
obj.NewObject["State"]);
}
private bool Completed
{
get
{
return isCompleted;
}
}
private void Reset()
{
isCompleted = false;
}
private void Done(object sender,
CompletedEventArgs obj)
{
isCompleted = true;
}
public static void Main()
{
EnumerateInstancesAsync example =
new EnumerateInstancesAsync();
return;
}
}
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
Konstruktor
ManagementOperationObserver() |
Menginisialisasi instans baru kelas ManagementOperationObserver. Ini adalah konstruktor tanpa parameter. |
Metode
Cancel() |
Membatalkan semua operasi yang terutang. |
Equals(Object) |
Menentukan apakah objek yang ditentukan sama dengan objek saat ini. (Diperoleh dari Object) |
GetHashCode() |
Berfungsi sebagai fungsi hash default. (Diperoleh dari Object) |
GetType() |
Mendapatkan instans Type saat ini. (Diperoleh dari Object) |
MemberwiseClone() |
Membuat salinan dangkal dari yang saat ini Object. (Diperoleh dari Object) |
ToString() |
Mengembalikan string yang mewakili objek saat ini. (Diperoleh dari Object) |
Acara
Completed |
Terjadi ketika operasi telah selesai. |
ObjectPut |
Terjadi ketika objek berhasil diterapkan. |
ObjectReady |
Terjadi ketika objek baru tersedia. |
Progress |
Terjadi untuk menunjukkan kemajuan operasi yang sedang berlangsung. |