ManagementReferenceAttribute 类

定义

public ref class ManagementReferenceAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, AllowMultiple=false)]
public sealed class ManagementReferenceAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, AllowMultiple=false)>]
type ManagementReferenceAttribute = class
    inherit Attribute

Public NotInheritable Class ManagementReferenceAttribute
Inherits Attribute

继承

Object

Attribute

ManagementReferenceAttribute

属性

AttributeUsageAttribute

示例

此示例演示如何将 ManagementReferenceAttribute 属性与 ManagementQualifierAttribute 创建链接其他两个 WMI 类的关联 WMI 类结合使用。 该示例是一个分离提供程序，它公开根/assoc 命名空间中的三个 WMI 类。 前两个类 NumberPhonetic 和 NumberLetter 由最后一个类 LetterPhonetic 链接。

若要编译该示例，需要包括对 System.Management.Instrumentation 和 System.Configuration.Install 的引用。 必须针对生成的可执行文件运行 installutil.exe，并确保程序正在运行才能使用实现的 WMI 类。

using System;
using System.Collections;
using System.Management.Instrumentation;

[assembly: WmiConfiguration("root/assoc", HostingModel = ManagementHostingModel.Decoupled)]

[System.ComponentModel.RunInstaller(true)]
public class TheInstaller : DefaultManagementInstaller
{ }

namespace AssocExample
{
    class Program
    {
        static void Main(string[] args)
        {
            InstrumentationManager.RegisterType(typeof(NumberPhonetic));
            InstrumentationManager.RegisterType(typeof(NumberLetter));
            InstrumentationManager.RegisterType(typeof(LetterPhonetic));

            Console.WriteLine("Press enter to exit");
            Console.ReadLine();

            InstrumentationManager.UnregisterType(typeof(NumberPhonetic));
            InstrumentationManager.UnregisterType(typeof(NumberLetter));
            InstrumentationManager.UnregisterType(typeof(LetterPhonetic));

        }
    }

  [ManagementEntity]
    public class NumberPhonetic
    {
        [ManagementKey]
        public int Number;

        [ManagementProbe]
        public string Name;

        [ManagementBind]
        public NumberPhonetic(int Number)
        {
           this.Number = Number;
           if(Number == 1)
           {
              Name = "alpha";
           }
           else if(Number == 2)
           {
              Name = "bravo";
           }
           else
           {
              throw new InstanceNotFoundException();
           }
        }

        [ManagementEnumerator]
        static public IEnumerable EnumerateInstances()
        {
            for (int i = 1; i < 3; i++)
            {
                yield return new NumberPhonetic(i);
            }
        }

    }

    [ManagementEntity]
    public class NumberLetter
    {
        [ManagementKey]
        public int Number;

        [ManagementProbe]
        public string Letter;

        [ManagementBind]
        public NumberLetter(int Number)
        {
           this.Number = Number;
           if(Number == 1)
           {
              Letter = "A";
           }
           else if(Number == 2)
           {
              Letter = "B";
           }
           else
           {
              throw new InstanceNotFoundException();
           }
        }

        [ManagementEnumerator]
        static public IEnumerable EnumerateInstances()
        {
            for (int i = 1; i < 3; i++)
            {
                yield return new NumberLetter(i);
            }
        }

    }

    [ManagementEntity]
    [ManagementQualifier("Association", Flavor = ManagementQualifierFlavors.DisableOverride)]
    public class LetterPhonetic
    {
        [ManagementReference(Type = "NumberLetter")]
        [ManagementKey]
        public string LetterNumber;

        [ManagementReference(Type = "NumberPhonetic")]
        [ManagementKey]
        public string PhoneticNumber;

        [ManagementEnumerator]
        static public IEnumerable EnumerateInstances()
        {
            ArrayList insts = new ArrayList();
            for (int i = 1; i < 3; i++)
            {
                LetterPhonetic inst = new LetterPhonetic();
                inst.LetterNumber = "Letter = " + i;
                inst.PhoneticNumber = "Phonetic = " + i;
                insts.Add(inst);
            }
            return insts;
        }

    }

}

注解

可以使用此属性创建关联类，如以下示例所示。