EventArrivedEventHandler 代理人

定義

命名空間:

System.Management

組件:

System.Management.dll

套件:

System.Management v8.0.0

來源:

ManagementEventWatcher.cs

表示處理 EventArrived 事件的方法。

C#

public delegate void EventArrivedEventHandler(object sender, EventArrivedEventArgs e);

參數

sender

Object

要叫用此方法的物件執行個體。

e

EventArrivedEventArgs

EventArrivedEventArgs，指定叫用事件的理由。

範例

下列異步範例會設定 WMI 定時器每秒引發事件，並在不再需要時將其移除。 ManagementEventWatcher會定義數個 .NET Framework 事件，這些事件會在傳遞 WMI 事件時引發。 委派會附加至這些事件，以處理傳入資料。

C#

using System;
using System.Management;

// This example shows asynchronous consumption of events.
// In this example you are listening for timer events.
// The first part of the example sets up the timer.
public class EventWatcherAsync
{
    public EventWatcherAsync()
    {
        // Set up a timer to raise events every 1 second
        //=============================================
        ManagementClass timerClass =
            new ManagementClass("__IntervalTimerInstruction");
        ManagementObject timer = timerClass.CreateInstance();
        timer["TimerId"] = "Timer1";
        timer["IntervalBetweenEvents"] = 1000;
        timer.Put();

        // Set up the event consumer
        //==========================
        // Create event query to receive timer events
        WqlEventQuery query =
            new WqlEventQuery("__TimerEvent",
            "TimerId=\"Timer1\"");

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

        // Set up a listener for events
        watcher.EventArrived +=
            new EventArrivedEventHandler(
            this.HandleEvent);

        // Start listening
        watcher.Start();

        // Do something in the meantime
        System.Threading.Thread.Sleep(10000);

        // Stop listening
        watcher.Stop();
    }

    private void HandleEvent(object sender,
        EventArrivedEventArgs e)
    {
        Console.WriteLine("Event arrived !");
    }

    public static void Main(string[] args)
    {
        // start the event watcher
        EventWatcherAsync eventWatcher = new
            EventWatcherAsync();
    }
}

擴充方法

適用於