我正在尝试运行以下代码:
ManagementObjectSearcher mos = new ManagementObjectSearcher("select * from Win32_Processor");
// This line throws the exception
ManagementObjectCollection moc = mos.Get();
我得到以下例外:
System.Management.ManagementException: Invalid class
at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode)
at System.Management.ManagementObjectCollection.ManagementObjectEnumerator.MoveNext()
at LicenseCheckThingy.Form1.button1_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
作为参考,我运行的系统是安装了 .net 3.5 的 Windows XP SP 3 计算机。
该计算机上的用户配置为管理员,但未使用“管理员”帐户。
我创建了一个示例项目,其中基本上只有这段代码作为错误证明。通过在这两行周围添加简单的显示消息,我知道 mos.Get() 行是抛出错误的行,并且异常文本似乎凭借堆栈跟踪中的“ManagementObjectEnumerator.MoveNext()”来支持这一点。不管怎样,我不知道该在机器上寻找什么。
注意,我已经在 50 多台其他机器(其中大多数是 vista 或 windows 7)上运行了相同的代码,没有出现任何问题,所以它看起来像是这个盒子特有的东西。关于我可以尝试什么的建议/想法?
更多信息: 所以我在机器上运行了以下代码,这会导致相同的异常,但是在 for 循环声明上
MessageBox.Show("pre setup"); // displays correctly
ManagementScope scope = new ManagementScope(@"\\" + Environment.MachineName + @"\root\cimv2");
//connect to the machine
scope.Connect();
MessageBox.Show("scope setup"); // displays correctly
//use a SelectQuery to tell what we're searching in
SelectQuery searchQuery = new SelectQuery("SELECT * FROM Win32_Processor");
//set the search up
ManagementObjectSearcher searcherObj = new ManagementObjectSearcher(scope, searchQuery);
MessageBox.Show("search object setup"); // displays correctly
//get the results into a collection
ManagementObjectCollection obj = searcherObj.Get();
MessageBox.Show("got ManagementObjectCollection"); // displays correctly
// next statement appears to cause Invalid class exception
foreach ( ManagementObject mo in obj )
{
try
{
MessageBox.Show("looking for device id, cpu0"); // never shows up
if ( string.Equals((string) mo["DeviceID"], "CPU0", StringComparison.InvariantCultureIgnoreCase) )
{
MessageBox.Show("processor ID: " + mo["ProcessorID"].ToString()); // never shows up
break;
}
}
catch ( Exception ex )
{
MessageBox.Show("Exception fetching processor id: " + ex.ToString()); // doesn't show
}
}
其他帮助??
无法弄清楚这一点,似乎是 Johnv2020 推荐的网站认为 Windows XP SP3 中存在错误或问题,不允许我获取处理器 ID。作为参考,这台机器上的处理器实际上是 i5 650,我通过将问题包装在 try catch 中并在本例中忽略处理器 ID 来“解决”这个问题。特别感谢Johnv2020的帮助!
对我来说工作正常,你可以尝试下面的代码并看看会发生什么吗
//set the scope of this search
ManagementScope scope = new ManagementScope(@"\\" + Environment.MachineName + @"\root\cimv2");
//connect to the machine
scope.Connect();
当 WMI 损坏时,WMI 查询上通常会出现 Invalid class 异常。 要验证它,请执行以下操作:
查看此链接以修复 Windows 10 上的 WMI: https://www.thewindowsclub.com/how-to-repair-or-rebuild-the-wmi-repository-on-windows-10