如何在C＃中使用WMI事件

有一些事件通过WMI公开，但我似乎找不到订阅和被提醒这些事件的任何示例。 特别是我想实现WmiMonitorBrightnessEvent来向Growl / Snarl发送通知。

Answer 1

这是用于接收WmiMonitorBrightnessEvent WMI事件的示例代码。

 using System; using System.Collections.Generic; using System.Management; using System.Text; namespace GetWMI_Info { public class EventWatcherAsync { private void WmiEventHandler(object sender, EventArrivedEventArgs e) { Console.WriteLine("Active : " + e.NewEvent.Properties["Active"].Value.ToString()); Console.WriteLine("Brightness : " + e.NewEvent.Properties["Brightness"].Value.ToString()); Console.WriteLine("InstanceName : " + e.NewEvent.Properties["InstanceName"].Value.ToString()); } public EventWatcherAsync() { try { string ComputerName = "localhost"; string WmiQuery; ManagementEventWatcher Watcher; ManagementScope Scope; if (!ComputerName.Equals("localhost", StringComparison.OrdinalIgnoreCase)) { ConnectionOptions Conn = new ConnectionOptions(); Conn.Username = ""; Conn.Password = ""; Conn.Authority = "ntlmdomain:DOMAIN"; Scope = new ManagementScope(String.Format("\\\\{0}\\root\\WMI", ComputerName), Conn); } else Scope = new ManagementScope(String.Format("\\\\{0}\\root\\WMI", ComputerName), null); Scope.Connect(); WmiQuery ="Select * From WmiMonitorBrightnessEvent"; Watcher = new ManagementEventWatcher(Scope, new EventQuery(WmiQuery)); Watcher.EventArrived += new EventArrivedEventHandler(this.WmiEventHandler); Watcher.Start(); Console.Read(); Watcher.Stop(); } catch (Exception e) { Console.WriteLine("Exception {0} Trace {1}", e.Message, e.StackTrace); } } public static void Main(string[] args) { Console.WriteLine("Listening {0}", "WmiMonitorBrightnessEvent"); Console.WriteLine("Press Enter to exit"); EventWatcherAsync eventWatcher = new EventWatcherAsync(); Console.Read(); } } } 

如果您是WMI的新手，请尝试使用WMI Delphi Code Creator类的工具并阅读与此主题相关的文档Receiving a WMI Event