EventWatcherOptions Constructores
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Inicializa una nueva instancia de la clase EventWatcherOptions para la inspección de eventos.
Sobrecargas
| EventWatcherOptions() |
Inicializa una nueva instancia de la clase EventWatcherOptions para la inspección de eventos, mediante los valores predeterminados. Este es el constructor sin parámetros. |
| EventWatcherOptions(ManagementNamedValueCollection, TimeSpan, Int32) |
Inicializa una nueva instancia de la clase EventWatcherOptions con los valores dados. |
EventWatcherOptions()
- Source:
- ManagementOptions.cs
- Source:
- ManagementOptions.cs
- Source:
- ManagementOptions.cs
Inicializa una nueva instancia de la clase EventWatcherOptions para la inspección de eventos, mediante los valores predeterminados. Este es el constructor sin parámetros.
public:
EventWatcherOptions();public EventWatcherOptions ();Public Sub New ()Ejemplos
En el ejemplo siguiente se muestra cómo el cliente recibe una notificación cuando se crea una instancia de Win32_Process porque la clase de eventos está __InstanceCreationEvent. Para obtener más información, consulte la documentación de Instrumental de administración de Windows . El cliente recibe eventos de forma sincrónica tras llamar al método WaitForNextEvent. Para probar este ejemplo, inicie un proceso, como Bloc de notas, mientras se ejecuta el código de ejemplo.
using System;
using System.Management;
// This example shows synchronous consumption of events.
// The client is blocked while waiting for events.
public class EventWatcherPolling
{
public static int Main(string[] args)
{
// Create event query to be notified within 1 second of
// a change in a service
string query = "SELECT * FROM" +
" __InstanceCreationEvent WITHIN 1 " +
"WHERE TargetInstance isa \"Win32_Process\"";
// Event options
EventWatcherOptions eventOptions = new
EventWatcherOptions();
eventOptions.Timeout = System.TimeSpan.MaxValue;
// Initialize an event watcher and subscribe to events
// that match this query
ManagementEventWatcher watcher =
new ManagementEventWatcher("root\\CIMV2", query,
eventOptions);
// Block until the next event occurs
// Note: this can be done in a loop if waiting for
// more than one occurrence
Console.WriteLine(
"Open an application (notepad.exe) to trigger an event.");
ManagementBaseObject e = watcher.WaitForNextEvent();
//Display information from the event
Console.WriteLine(
"Process {0} has been created, path is: {1}",
((ManagementBaseObject)e
["TargetInstance"])["Name"],
((ManagementBaseObject)e
["TargetInstance"])["ExecutablePath"]);
//Cancel the subscription
watcher.Stop();
return 0;
}
}
Imports System.Management
' This example shows synchronous consumption of events.
' The client is blocked while waiting for events.
Public Class EventWatcherPolling
Public Overloads Shared Function _
Main(ByVal args() As String) As Integer
' Create event query to be notified within 1 second of
' a change in a service
Dim query As String
query = "SELECT * FROM" & _
" __InstanceCreationEvent WITHIN 1 " & _
"WHERE TargetInstance isa ""Win32_Process"""
' Event options
Dim eventOptions As New EventWatcherOptions
eventOptions.Timeout = System.TimeSpan.MaxValue
' Initialize an event watcher and subscribe to events
' that match this query
Dim watcher As New ManagementEventWatcher( _
"root\CIMV2", query, eventOptions)
' Block until the next event occurs
' Note: this can be done in a loop
' if waiting for more than one occurrence
Console.WriteLine( _
"Open an application (notepad.exe) to trigger an event.")
Dim e As ManagementBaseObject = _
watcher.WaitForNextEvent()
'Display information from the event
Console.WriteLine( _
"Process {0} has created, path is: {1}", _
CType(e("TargetInstance"), _
ManagementBaseObject)("Name"), _
CType(e("TargetInstance"), _
ManagementBaseObject)("ExecutablePath"))
'Cancel the subscription
watcher.Stop()
Return 0
End Function 'Main
End Class
Comentarios
Seguridad de .NET Framework
Plena confianza para el llamador inmediato. Un código de confianza parcial no puede utilizar este miembro. Para obtener más información, consulte Uso de bibliotecas de código de confianza parcial.
Se aplica a
EventWatcherOptions(ManagementNamedValueCollection, TimeSpan, Int32)
- Source:
- ManagementOptions.cs
- Source:
- ManagementOptions.cs
- Source:
- ManagementOptions.cs
Inicializa una nueva instancia de la clase EventWatcherOptions con los valores dados.
public:
EventWatcherOptions(System::Management::ManagementNamedValueCollection ^ context, TimeSpan timeout, int blockSize);public EventWatcherOptions (System.Management.ManagementNamedValueCollection context, TimeSpan timeout, int blockSize);new System.Management.EventWatcherOptions : System.Management.ManagementNamedValueCollection * TimeSpan * int -> System.Management.EventWatcherOptionsPublic Sub New (context As ManagementNamedValueCollection, timeout As TimeSpan, blockSize As Integer)Parámetros
- context
- ManagementNamedValueCollection
El objeto de contexto de las opciones contiene información específica del proveedor que se puede pasar al proveedor.
- timeout
- TimeSpan
Tiempo de espera para los siguientes eventos.
- blockSize
- Int32
Número de eventos que se espera en cada bloque.
Ejemplos
En el ejemplo siguiente se muestra cómo el cliente recibe una notificación cuando se crea una instancia de Win32_Process porque la clase de eventos está __InstanceCreationEvent. Para obtener más información, consulte la documentación de Instrumental de administración de Windows . El cliente recibe eventos de forma sincrónica tras llamar al método WaitForNextEvent. Para probar este ejemplo, inicie un proceso, como Bloc de notas, mientras se ejecuta el código de ejemplo.
using System;
using System.Management;
// This example shows synchronous consumption of events.
// The client is blocked while waiting for events.
public class EventWatcherPolling
{
public static int Main(string[] args)
{
// Create event query to be notified within 1 second of
// a change in a service
string query = "SELECT * FROM" +
" __InstanceCreationEvent WITHIN 1 " +
"WHERE TargetInstance isa \"Win32_Process\"";
// Event options
// blockSize = 1 to receive one event
EventWatcherOptions eventOptions = new
EventWatcherOptions(null, System.TimeSpan.MaxValue,
1);
// Initialize an event watcher and subscribe to events
// that match this query
ManagementEventWatcher watcher =
new ManagementEventWatcher("root\\CIMV2", query,
eventOptions);
// Block until the next event occurs
// Note: this can be done in a loop if waiting for
// more than one occurrence
Console.WriteLine(
"Open an application (notepad.exe) to trigger an event.");
ManagementBaseObject e = watcher.WaitForNextEvent();
//Display information from the event
Console.WriteLine(
"Process {0} has been created, path is: {1}",
((ManagementBaseObject)e
["TargetInstance"])["Name"],
((ManagementBaseObject)e
["TargetInstance"])["ExecutablePath"]);
//Cancel the subscription
watcher.Stop();
return 0;
}
}
Imports System.Management
' This example shows synchronous consumption of events.
' The client is blocked while waiting for events.
Public Class EventWatcherPolling
Public Overloads Shared Function _
Main(ByVal args() As String) As Integer
' Create event query to be notified within 1 second of
' a change in a service
Dim query As String
query = "SELECT * FROM" & _
" __InstanceCreationEvent WITHIN 1 " & _
"WHERE TargetInstance isa ""Win32_Process"""
' Event options
' blockSize = 1 to receive one event
Dim eventOptions As New EventWatcherOptions( _
Nothing, System.TimeSpan.MaxValue, 1)
' Initialize an event watcher and subscribe to events
' that match this query
Dim watcher As New ManagementEventWatcher( _
"root\CIMV2", query, eventOptions)
' Block until the next event occurs
' Note: this can be done in a loop
' if waiting for more than one occurrence
Console.WriteLine( _
"Open an application (notepad.exe) to trigger an event.")
Dim e As ManagementBaseObject = _
watcher.WaitForNextEvent()
'Display information from the event
Console.WriteLine( _
"Process {0} has created, path is: {1}", _
CType(e("TargetInstance"), _
ManagementBaseObject)("Name"), _
CType(e("TargetInstance"), _
ManagementBaseObject)("ExecutablePath"))
'Cancel the subscription
watcher.Stop()
Return 0
End Function 'Main
End Class
Comentarios
Seguridad de .NET Framework
Plena confianza para el llamador inmediato. Un código de confianza parcial no puede utilizar este miembro. Para obtener más información, consulte Uso de bibliotecas de código de confianza parcial.
