我是WMI的新手,我需要在C#服务中实现RegistryValueChangeEvent。
我需要一个事件处理程序,每当一组注册表值中的任何一个发生更改时都会触发。我希望行为类似于FileSystemWatcher类的Changed事件,但用于注册表值。
如果有其他技术可以用来完成同样的任务,我也会很感激。我的最低要求是它是一个比我现在拥有的更好的解决方案:每20秒轮询一次,并将注册表值与最后的结果进行比较。
请在您的答案中提供示例代码。如果我能得到一个只监视一个注册表值的示例,那就太好了。
我需要.Net 2.0中的解决方案
谢谢。
发布于 2009-05-11 18:55:39
使用WMI有时会很有趣……我想我理解你的问题,所以看看下面的代码片段,如果它是你要找的,请告诉我。
// ---------------------------------------------------------------------------------------------------------------------
// <copyright file="Program.cs" company="">
//
// </copyright>
// <summary>
// Defines the WmiChangeEventTester type.
// </summary>
// ---------------------------------------------------------------------------------------------------------------------
namespace WmiExample
{
using System;
using System.Management;
/// <summary>
/// </summary>
public class WmiChangeEventTester
{
/// <summary>
/// Initializes a new instance of the <see cref="WmiChangeEventTester"/> class.
/// </summary>
public WmiChangeEventTester()
{
try
{
// Your query goes below; "KeyPath" is the key in the registry that you
// want to monitor for changes. Make sure you escape the \ character.
WqlEventQuery query = new WqlEventQuery(
"SELECT * FROM RegistryValueChangeEvent WHERE " +
"Hive = 'HKEY_LOCAL_MACHINE'" +
@"AND KeyPath = 'SOFTWARE\\Microsoft\\.NETFramework' AND ValueName='InstallRoot'");
ManagementEventWatcher watcher = new ManagementEventWatcher(query);
Console.WriteLine("Waiting for an event...");
// Set up the delegate that will handle the change event.
watcher.EventArrived += new EventArrivedEventHandler(HandleEvent);
// Start listening for events.
watcher.Start();
// Do something while waiting for events. In your application,
// this would just be continuing business as usual.
System.Threading.Thread.Sleep(100000000);
// Stop listening for events.
watcher.Stop();
}
catch (ManagementException managementException)
{
Console.WriteLine("An error occurred: " + managementException.Message);
}
}
/// <summary>
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void HandleEvent(object sender, EventArrivedEventArgs e)
{
Console.WriteLine("Received an event.");
// RegistryKeyChangeEvent occurs here; do something.
}
/// <summary>
/// </summary>
public static void Main()
{
// Just calls the class above to check for events...
WmiChangeEventTester receiveEvent = new WmiChangeEventTester();
}
}
}
发布于 2009-05-11 18:54:21
您是否仅限于使用WMI?如果没有,您可以使用像RegistryMonitor这样的RegNotifyChangeKeyValue包装器
发布于 2009-05-14 00:54:35
正如其他人所指出的那样,您真的不需要WMI。我也使用过RegistryMonitor,没有任何问题。
如果您需要一个示例,页面本身上已经提供了RegistryMonitor的示例代码。您是否向下滚动到代码项目上的这一部分:
public class MonitorSample
{
static void Main()
{
RegistryMonitor monitor = new
RegistryMonitor(RegistryHive.CurrentUser, "Environment");
monitor.RegChanged += new EventHandler(OnRegChanged);
monitor.Start();
while(true);
monitor.Stop();
}
private void OnRegChanged(object sender, EventArgs e)
{
Console.WriteLine("registry key has changed");
}
}
https://stackoverflow.com/questions/826971
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