WPF应用程序调用WMI API抛出异常 [英] WPF app call WMI API throw exception

问题描述

在调用WMI的 searcher.Get（）方法时抛出异常，是什么原因？

以下异常堆栈

消息：

  指定的演员表无效。

StackTrace：

  在System.StubHelpers.InterfaceMarshaler.ConvertToNative（Object objSrc，IntPtr itfMT，IntPtr classMT，Int32 flags）

   at System.Management.SecuredIWbemServicesHandler.ExecQuery_（String strQueryLanguage，String strQuery，Int32 lFlags，IWbemContext pCtx，IEnumWbemClassObject& ppEnum）

  在System.Management.ManagementObjectSearcher.Get（）

以下代码

 var searcher = new ManagementObjectSearcher（@" root \\ \\ cimv2"，
" SELECT * FROM Win32_DiskDrive"）; 
 
 foreach（searcher.Get（）中的ManagementObject项目）
 {
 //列表项目代码
} 

解决方案

hi，

根据异常消息，您正在尝试无效演员。

以下代码适用于我。

 ManagementObjectSearcher searcher = new ManagementObjectSearcher（" select * from" +"Win32_DiskDrive"）; 
 ManagementObjectCollection moc = searcher.Get（）; 
 foreach（ManagementObject mo in moc）
 {
 Console.WriteLine（" %%%%%%%%%%%%：" + mo.ToString（））; 
} 

或者：

 ManagementClass mc = new ManagementClass （QUOT; Win32_DiskDrive"）; 
 ManagementObjectCollection moc = mc.GetInstances（）; 
 
 foreach（管理对象mo in moc）
 {
 Console.WriteLine（mo.ToString（））; 
 
} 

此致，

鲍勃

Hi,

throw exception when call the WMI's searcher.Get() method , what's reason?

following exception stack

Message:
   Specified cast is not valid.
StackTrace:
   at System.StubHelpers.InterfaceMarshaler.ConvertToNative(Object objSrc, IntPtr itfMT, IntPtr classMT, Int32 flags)
   at System.Management.SecuredIWbemServicesHandler.ExecQuery_(String strQueryLanguage, String strQuery, Int32 lFlags, IWbemContext pCtx, IEnumWbemClassObject& ppEnum)
   at System.Management.ManagementObjectSearcher.Get()

following code

var searcher = new ManagementObjectSearcher(@"root\cimv2",
                "SELECT * FROM Win32_DiskDrive");

foreach (ManagementObject item in searcher.Get())
{
   //list item code
}

解决方案

hi,

According to the message of exception , you are trying a invalid cast.

Following code works fine for me.

          ManagementObjectSearcher searcher = new ManagementObjectSearcher("select * from " + "Win32_DiskDrive");   
            ManagementObjectCollection moc = searcher.Get();
            foreach (ManagementObject mo in moc)
            {
                Console.WriteLine("%%%%%%%%%%%%:" + mo.ToString());              
            }

Or :

 ManagementClass mc = new ManagementClass("Win32_DiskDrive");
            ManagementObjectCollection moc = mc.GetInstances();

            foreach (ManagementObject mo in moc)
            {
                Console.WriteLine(mo.ToString());
               
            }

Sincerely,

Bob

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