如何以编程方式确定哪个WMI属性是类的主键？

Question

我需要动态确定WMI类的哪个属性是C#中的主键.

我可以使用CIM Studio或WMI Delphi Code Creator手动查找此信息,但我需要查找类的所有属性名称和标记哪些是键/键...我已经知道如何查找属性名称一类.

手动识别密钥在相关的答案中有所涉及,我希望作者(我正在看RRUZ)可能能够让我了解他们如何找到密钥(或任何可能知道的人).

非常感谢.

Answer 1

要获取WMI类的关键字段,必须迭代WMI类qualifiers的属性,然后搜索调用的限定符key,最后检查该限定符的值是否为true.

试试这个样本

using System;
using System.Collections.Generic;
using System.Management;
using System.Text;

namespace GetWMI_Info
{
    class Program
    {

        static string GetKeyField(string WmiCLass)
        {
            string key = null; 
            ManagementClass manClass = new ManagementClass(WmiCLass);
            manClass.Options.UseAmendedQualifiers = true;
            foreach (PropertyData Property in manClass.Properties)
                foreach (QualifierData Qualifier in Property.Qualifiers)
                    if (Qualifier.Name.Equals("key") && ((System.Boolean)Qualifier.Value))                        
                        return Property.Name;
            return key;                                                    
        }

        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine(String.Format("The Key field of the WMI class {0} is {1}", "Win32_DiskPartition", GetKeyField("Win32_DiskPartition")));
                Console.WriteLine(String.Format("The Key field of the WMI class {0} is {1}", "Win32_Process", GetKeyField("Win32_Process")));
            }
            catch (Exception e)
            {
                Console.WriteLine(String.Format("Exception {0} Trace {1}", e.Message, e.StackTrace));
            }
            Console.WriteLine("Press Enter to exit");
            Console.Read();
        }
    }
}