ManagementEventWatcher コンストラクター

定義

名前空間:: System.Management

アセンブリ:: System.Management.dll

パッケージ:: System.Management v11.0.0-preview.4.26230.115

重要

一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。

ManagementEventWatcher クラスの新しいインスタンスを初期化します。

オーバーロード

名前	説明
ManagementEventWatcher()	ManagementEventWatcher クラスの新しいインスタンスを初期化します。さらに初期化を行う場合は、オブジェクトのプロパティを設定します。これはパラメーターなしのコンストラクターです。
ManagementEventWatcher(EventQuery)	WMI ManagementEventWatcherが指定されたときに、クラスの新しいインスタンスを初期化します。
ManagementEventWatcher(String)	WMI ManagementEventWatcherを文字列形式で指定した場合に、クラスの新しいインスタンスを初期化します。
ManagementEventWatcher(ManagementScope, EventQuery)	指定された WMI ManagementEventWatcherに準拠するイベントをリッスンするクラスの新しいインスタンスを初期化します。
ManagementEventWatcher(String, String)	指定された WMI ManagementEventWatcherに準拠するイベントをリッスンするクラスの新しいインスタンスを初期化します。このバリアントの場合、クエリとスコープは文字列として指定されます。
ManagementEventWatcher(ManagementScope, EventQuery, EventWatcherOptions)	指定したオプションに従って、指定した WMI イベントクエリに準拠するイベントをリッスンする ManagementEventWatcher クラスの新しいインスタンスを初期化します。このバリアントの場合、クエリとスコープは指定されたオブジェクトです。 options オブジェクトでは、タイムアウトやコンテキスト情報などのオプションを指定できます。
ManagementEventWatcher(String, String, EventWatcherOptions)	指定したオプションに従って、指定した WMI イベント ManagementEventWatcherに準拠するイベントをリッスンするクラスの新しいインスタンスを初期化します。このバリアントの場合、クエリとスコープは文字列として指定されます。 options オブジェクトでは、タイムアウトやコンテキスト情報などのオプションを指定できます。

ManagementEventWatcher()

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ManagementEventWatcher クラスの新しいインスタンスを初期化します。さらに初期化を行う場合は、オブジェクトのプロパティを設定します。これはパラメーターなしのコンストラクターです。

public:
 ManagementEventWatcher();

public ManagementEventWatcher();

Public Sub New ()

例

次の例は、イベントクラスが__InstanceCreationEventされているために、Win32_Processのインスタンスが作成されたときにクライアントが通知を受け取る方法を示しています。詳細については、Windows Management Instrumentation のドキュメントを参照してください。クライアントは、 WaitForNextEvent メソッドを呼び出して同期的にイベントを受信します。この例は、コード例の実行中にメモ帳などのプロセスを開始することでテストできます。

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
        WqlEventQuery query =
            new WqlEventQuery("__InstanceCreationEvent",
            new TimeSpan(0,0,1),
            "TargetInstance isa \"Win32_Process\"");

        // Initialize an event watcher and subscribe to events
        // that match this query
        ManagementEventWatcher watcher =
            new ManagementEventWatcher();
        watcher.Query = query;
        // times out watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = new TimeSpan(0,0,5);

        // 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 New WqlEventQuery( _
            "__InstanceCreationEvent", _
            New TimeSpan(0, 0, 1), _
            "TargetInstance isa ""Win32_Process""")

        ' Initialize an event watcher and subscribe to events 
        ' that match this query
        Dim watcher As New ManagementEventWatcher
        watcher.Query = query
        ' times watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = New TimeSpan(0, 0, 5)

        ' 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

注釈

.NET Framework のセキュリティ

直接呼び出し元に対する完全な信頼。このメンバーは、部分的に信頼されたコードでは使用できません。詳細については、「部分信頼コードからのライブラリの使用」を参照してください。

適用対象

ManagementEventWatcher(EventQuery)

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

WMI ManagementEventWatcherが指定されたときに、クラスの新しいインスタンスを初期化します。

public:
 ManagementEventWatcher(System::Management::EventQuery ^ query);

public ManagementEventWatcher(System.Management.EventQuery query);

new System.Management.ManagementEventWatcher : System.Management.EventQuery -> System.Management.ManagementEventWatcher

Public Sub New (query As EventQuery)

パラメーター

query: EventQuery

ウォッチャーがリッスンするイベントを決定する WMI イベントクエリを表す EventQuery 。

例

このコード例では、イベントクラスが__InstanceCreationEventされているため、Win32_Processのインスタンスが作成されたときにクライアントは通知を受け取ります。詳細については、Windows Management Instrumentation のドキュメントを参照してください。クライアントは、 WaitForNextEvent メソッドを呼び出して同期的にイベントを受信します。この例は、コード例の実行中にメモ帳などのプロセスを開始することでテストできます。

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\"";

        // Initialize an event watcher and subscribe to events
        // that match this query
        ManagementEventWatcher watcher =
            new ManagementEventWatcher(new EventQuery(query));

        // times out watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = new TimeSpan(0,0,5);

        // 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"""

        ' Initialize an event watcher and subscribe to events 
        ' that match this query
        Dim watcher As New ManagementEventWatcher(New EventQuery( _
        query))

        ' times watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = New TimeSpan(0, 0, 5)

        ' 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

注釈

ウォッチャーがイベントをリッスンする名前空間は、現在設定されている既定の名前空間です。

.NET Framework のセキュリティ

適用対象

ManagementEventWatcher(String)

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

WMI ManagementEventWatcherを文字列形式で指定した場合に、クラスの新しいインスタンスを初期化します。

public:
 ManagementEventWatcher(System::String ^ query);

public ManagementEventWatcher(string query);

new System.Management.ManagementEventWatcher : string -> System.Management.ManagementEventWatcher

Public Sub New (query As String)

パラメーター

query: String

監視者がリッスンするイベントを定義する WMI イベントクエリ。

例

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\"";

        // Initialize an event watcher and subscribe to events
        // that match this query
        ManagementEventWatcher watcher =
            new ManagementEventWatcher(query);

        // times out watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = new TimeSpan(0,0,5);

        // 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"""

        ' Initialize an event watcher and subscribe to events 
        ' that match this query
        Dim watcher As New ManagementEventWatcher(query)

        ' times watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = New TimeSpan(0, 0, 5)

        ' 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

注釈

ウォッチャーがイベントをリッスンする名前空間は、現在設定されている既定の名前空間です。

.NET Framework のセキュリティ

適用対象

ManagementEventWatcher(ManagementScope, EventQuery)

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

指定された WMI ManagementEventWatcherに準拠するイベントをリッスンするクラスの新しいインスタンスを初期化します。

public:
 ManagementEventWatcher(System::Management::ManagementScope ^ scope, System::Management::EventQuery ^ query);

public ManagementEventWatcher(System.Management.ManagementScope scope, System.Management.EventQuery query);

new System.Management.ManagementEventWatcher : System.Management.ManagementScope * System.Management.EventQuery -> System.Management.ManagementEventWatcher

Public Sub New (scope As ManagementScope, query As EventQuery)

パラメーター

scope: ManagementScope

ウォッチャーがイベントをリッスンするスコープ (名前空間) を表す ManagementScope 。

query: EventQuery

ウォッチャーがリッスンするイベントを決定する WMI イベントクエリを表す EventQuery 。

例

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\"";

        // Initialize an event watcher and subscribe to events
        // that match this query
        ManagementEventWatcher watcher =
            new ManagementEventWatcher(
            new ManagementScope("root\\CIMV2"),
            new EventQuery(query));

        // times out watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = new TimeSpan(0,0,5);

        // 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"""

        ' Initialize an event watcher and subscribe to events 
        ' that match this query
        Dim watcher As New ManagementEventWatcher( _
            New ManagementScope("root\CIMV2"), _
            New EventQuery(query))

        ' times watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = New TimeSpan(0, 0, 5)

        ' 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

注釈

.NET Framework のセキュリティ

適用対象

ManagementEventWatcher(String, String)

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

指定された WMI ManagementEventWatcherに準拠するイベントをリッスンするクラスの新しいインスタンスを初期化します。このバリアントの場合、クエリとスコープは文字列として指定されます。

public:
 ManagementEventWatcher(System::String ^ scope, System::String ^ query);

public ManagementEventWatcher(string scope, string query);

new System.Management.ManagementEventWatcher : string * string -> System.Management.ManagementEventWatcher

Public Sub New (scope As String, query As String)

パラメーター

scope: String

ウォッチャーがイベントをリッスンする管理スコープ (名前空間)。

query: String

ウォッチャーがリッスンするイベントを定義するクエリ。

例

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\"";

        // Initialize an event watcher and subscribe to events
        // that match this query
        ManagementEventWatcher watcher =
            new ManagementEventWatcher("root\\CIMV2",
            query);

        // times out watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = new TimeSpan(0,0,5);

        // 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"""

        ' Initialize an event watcher and subscribe to events 
        ' that match this query
        Dim watcher As New ManagementEventWatcher( _
            "root\CIMV2", query)

        ' times watcher.WaitForNextEvent in 5 seconds
        watcher.Options.Timeout = New TimeSpan(0, 0, 5)

        ' 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

注釈

.NET Framework のセキュリティ

適用対象

ManagementEventWatcher(ManagementScope, EventQuery, EventWatcherOptions)

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

指定したオプションに従って、指定した WMI イベントクエリに準拠するイベントをリッスンする ManagementEventWatcher クラスの新しいインスタンスを初期化します。このバリアントの場合、クエリとスコープは指定されたオブジェクトです。 options オブジェクトでは、タイムアウトやコンテキスト情報などのオプションを指定できます。

public:
 ManagementEventWatcher(System::Management::ManagementScope ^ scope, System::Management::EventQuery ^ query, System::Management::EventWatcherOptions ^ options);

public ManagementEventWatcher(System.Management.ManagementScope scope, System.Management.EventQuery query, System.Management.EventWatcherOptions options);

new System.Management.ManagementEventWatcher : System.Management.ManagementScope * System.Management.EventQuery * System.Management.EventWatcherOptions -> System.Management.ManagementEventWatcher

Public Sub New (scope As ManagementScope, query As EventQuery, options As EventWatcherOptions)

パラメーター

scope: ManagementScope

ウォッチャーがイベントをリッスンするスコープ (名前空間) を表す ManagementScope 。

query: EventQuery

ウォッチャーがリッスンするイベントを決定する WMI イベントクエリを表す EventQuery 。

options: EventWatcherOptions

イベントの監視に使用される追加のオプションを表す EventWatcherOptions 。

例

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, so wait for 1 event to return
        EventWatcherOptions options = new EventWatcherOptions(
            null, TimeSpan.MaxValue, 1);

        // Initialize an event watcher and subscribe to events
        // that match this query
        ManagementEventWatcher watcher =
            new ManagementEventWatcher(
            new ManagementScope("root\\CIMV2"),
            new EventQuery(query), options);

        // 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, so wait for 1 event to return
        Dim options As New EventWatcherOptions( _
            Nothing, TimeSpan.MaxValue, 1)


        ' Initialize an event watcher and subscribe to events 
        ' that match this query
        Dim watcher As New ManagementEventWatcher( _
            New ManagementScope("root\CIMV2"), _
            New EventQuery(query), _
            options)

        ' 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

注釈

.NET Framework のセキュリティ

適用対象

ManagementEventWatcher(String, String, EventWatcherOptions)

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

ソース:: ManagementEventWatcher.cs

指定したオプションに従って、指定した WMI イベント ManagementEventWatcherに準拠するイベントをリッスンするクラスの新しいインスタンスを初期化します。このバリアントの場合、クエリとスコープは文字列として指定されます。 options オブジェクトでは、タイムアウトやコンテキスト情報などのオプションを指定できます。

public:
 ManagementEventWatcher(System::String ^ scope, System::String ^ query, System::Management::EventWatcherOptions ^ options);

public ManagementEventWatcher(string scope, string query, System.Management.EventWatcherOptions options);

new System.Management.ManagementEventWatcher : string * string * System.Management.EventWatcherOptions -> System.Management.ManagementEventWatcher

Public Sub New (scope As String, query As String, options As EventWatcherOptions)

パラメーター

scope: String

ウォッチャーがイベントをリッスンする管理スコープ (名前空間)。

query: String

ウォッチャーがリッスンするイベントを定義するクエリ。

options: EventWatcherOptions

イベントの監視に使用される追加のオプションを表す EventWatcherOptions 。

例

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, so wait for 1 event to return
        EventWatcherOptions options = new EventWatcherOptions(
            null, TimeSpan.MaxValue, 1);

        // Initialize an event watcher and subscribe to events
        // that match this query
        ManagementEventWatcher watcher =
            new ManagementEventWatcher(
            new ManagementScope("root\\CIMV2"),
            new EventQuery(query), options);

        // 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, so wait for 1 event to return
        Dim options As New EventWatcherOptions( _
            Nothing, TimeSpan.MaxValue, 1)


        ' Initialize an event watcher and subscribe to events 
        ' that match this query
        Dim watcher As New ManagementEventWatcher( _
            "root\CIMV2", _
            query, _
            options)

        ' 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

注釈

.NET Framework のセキュリティ

適用対象

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