C# 访问 ManagementObjectCollection 中的管理对象

发布于 2024-09-16 08:29:05 字数 363 浏览 8 评论 0原文

我试图在不使用 foreach 语句的情况下访问 ManagementObjectCollection 中的 ManagementObjects，也许我遗漏了一些东西，但我不知道该怎么做，我需要执行如下操作：

ManagementObjectSearcher query = new ManagementObjectSearcher(
     "select Name, CurrentClockSpeed from Win32_Processor");

ManagementObjectCollection queryCollection = query.Get();

ManagementObject mo = queryCollection[0];

原文

I'm trying to access ManagementObjects in ManagementObjectCollection without using a foreach statement, maybe I'm missing something but I can't figure out how to do it, I need to do something like the following:

ManagementObjectSearcher query = new ManagementObjectSearcher(
     "select Name, CurrentClockSpeed from Win32_Processor");

ManagementObjectCollection queryCollection = query.Get();

ManagementObject mo = queryCollection[0];

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

心凉怎暖 2024-09-23 08:29:05

ManagementObjectCollection 实现 IEnumerable 或 ICollection，因此您必须迭代它通过 IEnumerable （即 foreach）或通过 ICollection 复制到数组。

但是，由于它支持 IEnumerable，因此您可以使用 Linq ：

ManagementObject mo = queryCollection.OfType<ManagementObject>().FirstOrDefault()

OfType 是必需的，因为 ManagementObjectCollection 支持 IEnumerable 但不支持 T 的IEnumerable。

ManagementObjectCollection implements IEnumerable or ICollection, so either you must iterate it via IEnumerable (ie foreach) or CopyTo an array via ICollection.

However since it supports IEnumerable you can use Linq :

ManagementObject mo = queryCollection.OfType<ManagementObject>().FirstOrDefault()

OfType<ManagementObject> is required because ManagementObjectCollection supports IEnumerable but not IEnumerable of T.

回复收藏 0 原文

岁月苍老的讽刺 2024-09-23 08:29:05

您不能直接从 ManagementObjectCollection （也不能从整数索引器）调用 linq。
您必须首先将其转换为 IEnumerable：

var queryCollection = from ManagementObject x in query.Get()
                      select x;

var manObj = queryCollection.FirstOrDefault();

You can not directly call linq from ManagementObjectCollection (nor an integer indexer).
You have to cast it to IEnumerable first:

var queryCollection = from ManagementObject x in query.Get()
                      select x;

var manObj = queryCollection.FirstOrDefault();

回复收藏 0 原文

勿忘初心 2024-09-23 08:29:05

ManagementObjectCollection 不实现索引器，但是如果您使用 linq，您可以使用 FirstOrDefault 扩展函数，但使用 .net 3 或更早版本的极客（比如我仍在使用 1.1）可以使用以下代码，这是获取第一项的标准方法来自任何实现了 IEnumerable 接口的集合。

//TODO: Do the Null and Count Check before following lines
IEnumerator enumerator = collection.GetEnumerator();
enumerator.MoveNext();
ManagementObject mo = (ManagementObject)enumerator.Current;

以下是从任何索引检索 ManagementObject 的两种不同方法

private ManagementObject GetItem(ManagementObjectCollection collection, int index)
{
            //TODO: do null handling 

            IEnumerator enumerator = collection.GetEnumerator();

            int currentIndex = 0;
            while (enumerator.MoveNext())
            {
                if (currentIndex == index)
                {
                    return enumerator.Current as ManagementObject;
                }

                currentIndex++;
            }

            throw new ArgumentOutOfRangeException("Index out of range");
 }

或

private ManagementObject GetItem(ManagementObjectCollection collection, int index)
{
            //TODO: do null handling 

            int currentIndex = 0;
            foreach (ManagementObject mo in collection)
            {
                if (currentIndex == index)
                {
                    return mo;
                }

                currentIndex++;
            }

            throw new ArgumentOutOfRangeException("Index out of range");
 }

ManagementObjectCollection does not implements Indexers, but yes you can you FirstOrDefault extension function if you are using linq but geeks who are using .net 3 or earlier (like me still working on 1.1) can use following code, it is standard way of getting first item from any collection implemented IEnumerable interface.

//TODO: Do the Null and Count Check before following lines
IEnumerator enumerator = collection.GetEnumerator();
enumerator.MoveNext();
ManagementObject mo = (ManagementObject)enumerator.Current;

following are two different ways to retrieve ManagementObject from any index

private ManagementObject GetItem(ManagementObjectCollection collection, int index)
{
            //TODO: do null handling 

            IEnumerator enumerator = collection.GetEnumerator();

            int currentIndex = 0;
            while (enumerator.MoveNext())
            {
                if (currentIndex == index)
                {
                    return enumerator.Current as ManagementObject;
                }

                currentIndex++;
            }

            throw new ArgumentOutOfRangeException("Index out of range");
 }

private ManagementObject GetItem(ManagementObjectCollection collection, int index)
{
            //TODO: do null handling 

            int currentIndex = 0;
            foreach (ManagementObject mo in collection)
            {
                if (currentIndex == index)
                {
                    return mo;
                }

                currentIndex++;
            }

            throw new ArgumentOutOfRangeException("Index out of range");
 }

回复收藏 0 原文

~没有更多了~