WMI-从Win32_Product中选择需要很长时间 [英] WMI - select from Win32_Product takes a long time

问题描述

我正在枚举使用WMI安装的应用程序，并且无论我如何构造它，此块都需要花费较长的时间才能完成.每次在我的环境中花费13秒.有没有更好(更快)的方法来检查程序是否已安装?(我使用iTunes作为示例程序进行检查)

I am enumerating installed applications using WMI, and this block is taking a relatively long time to complete no matter how I structure it. It takes 13 seconds in my environment every time. Is there a better (faster) way to check if a program is installed? (I'm using iTunes as an example program to check for)

    private static string Timestamp
    {
        get { return DateTime.Now.ToString("HH:mm:ss.ffff"); }
    }

    private static void LoadInstalledPrograms()
    {
        List<string> installedPrograms = new List<string>();
        Console.WriteLine("0 - {0}", Timestamp);
        ManagementObjectSearcher mos = new ManagementObjectSearcher("SELECT * FROM Win32_Product");
        Console.WriteLine("1 - {0}", Timestamp);
        ManagementObjectCollection managementObjectCollection = mos.Get();
        Console.WriteLine("2 - {0}", Timestamp);
        foreach (ManagementObject mo in managementObjectCollection)
        {
            installedPrograms.Add(mo["Name"].ToString());
        }
        Console.WriteLine("3 - {0}", Timestamp);
        Console.WriteLine("Length - {0}", installedPrograms.Count);
    }

选择*来自Win32_Product

0 - 08:08:51.3762
1 - 08:08:51.3942
2 - 08:08:51.4012
3 - 08:09:04.8326
Length - 300

SELECT * FROM Win32_Product WHERE name ='iTunes'

0 - 08:14:17.6529
1 - 08:14:17.6709
2 - 08:14:17.6779
3 - 08:14:31.0332
Length - 1

选择*从Win32_Product，名称类似于"iTunes"

0 - 08:16:38.2719
1 - 08:16:38.2899
2 - 08:16:38.2999
3 - 08:16:51.5113
Length - 1

从Win32_Product中选择名称，其中的名称类似于"iTunes"

0 - 08:19:53.9144
1 - 08:19:53.9324
2 - 08:19:53.9394
3 - 08:20:07.2794
Length - 1

推荐答案

WMI正在花费时间，您已经注意到了.遍历注册表可能会为您解决问题.

WMI is taking it's time as you already noticed. Iterating through the registry might do the trick for you.

您可以在此处获取已安装的应用程序在stackoverflow上，其中提到了两种方法.

You might have a look at Get installed applications in a system here on stackoverflow, where both methods are mentioned.

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