c# - WMI 性能不佳

Question

我用 C# 编写了一个代码，使用 WMI (System.Management) 将逻辑驱动器映射到它们的物理磁盘。该代码运行完美，但速度非常慢。在我的机器(Windows 7 x64，双核和 3 GB RAM)中，它运行至少 1 秒。1 秒对我来说太慢了，即使是 0.1 也足以完成。这个功能可以在不到 0.1 秒内完成，这让我非常难过。

是否有任何 Win32API 函数可以提供帮助？

还有什么建议吗？

到目前为止，这是我的代码:

List<Dictionary<string, string>> results = new List<Dictionary<string, string>>();

using (ManagementClass diskDriveClass = new ManagementClass(@"Win32_Diskdrive"))
{
    using (ManagementObjectCollection diskDrives = diskDriveClass.GetInstances())
    {
        foreach (ManagementObject diskDrive in diskDrives)
        {
            string deviceId = (string)diskDrive["DeviceId"];
            Dictionary<string, string> logicalDisksResults = new Dictionary<string, string>();
            Trace.WriteLine(deviceId);

            using (ManagementObjectCollection relatedPartitions = diskDrive.GetRelated("Win32_DiskPartition"))
            {
                foreach (ManagementObject relatedPartition in relatedPartitions)
                {
                    Trace.WriteLine("-\t" + relatedPartition["Name"]);

                    using (ManagementObjectCollection relatedLogicalDisks = relatedPartition.GetRelated("Win32_LogicalDisk"))
                    {
                        foreach (ManagementBaseObject relatedLogicalDisk in
                        relatedLogicalDisks)
                        {
                            Trace.WriteLine("\t-\t" + relatedLogicalDisk["Name"] + " " + relatedLogicalDisk["FileSystem"]);
                            logicalDisksResults.Add((string)relatedLogicalDisk["Name"], (string)relatedLogicalDisk["FileSystem"]);
                        }
                    }
                }
            }

            results.Add(logicalDisksResults);
        }
    }
}

Answer 1

好吧，这里有一些代码至少在我的系统上运行速度更快(从客观的角度来看)并给出相同的结果。由于驱动器列表几乎不可能逐秒更改，我不确定您为什么如此关心，但无论如何，看看这是否会让您更快乐。您可以通过删除开始时获取 Win32_DiskDrive 的代码来稍微加快它的速度，但祝它在 0.1 秒内运行:)

Dictionary<string, Dictionary<string, string>> results = new Dictionary<string,Dictionary<string,string>>();            ManagementClass diskPartMap = null;ManagementObjectCollection diskPartIns = null;ManagementClass partLogicalMap = null;ManagementObjectCollection partLogicalIns = null;try{    using (ManagementClass diskDriveClass = new ManagementClass("Win32_Diskdrive"))    {        using (ManagementObjectCollection diskDrives = diskDriveClass.GetInstances())        {            foreach (ManagementObject diskDrive in diskDrives)            {                results.Add((string)diskDrive["DeviceId"], new Dictionary<string, string>());            }        }    }    Dictionary<string, ManagementObject> partToDisk = new Dictionary<string, ManagementObject>();    Dictionary<string, ManagementObject> partToLogical = new Dictionary<string, ManagementObject>();    diskPartMap = new ManagementClass("Win32_DiskDriveToDiskPartition");    diskPartIns = diskPartMap.GetInstances();    foreach (ManagementObject diskDrive in diskPartIns)    {        ManagementObject o = new ManagementObject((string)diskDrive["Antecedent"]);        partToDisk.Add((string)diskDrive["Dependent"], o);    }    partLogicalMap = new ManagementClass("Win32_LogicalDiskToPartition");    partLogicalIns = partLogicalMap.GetInstances();    foreach (ManagementObject diskDrive in partLogicalIns)    {        ManagementObject o = new ManagementObject((string)diskDrive["Dependent"]);        string s = (string)diskDrive["Antecedent"];        partToLogical.Add(s, o);    }    foreach (KeyValuePair<string, ManagementObject> pair in partToDisk)    {        string deviceId = (string)pair.Value["DeviceId"];        Dictionary<string, string> dict = null;        if (!results.ContainsKey(deviceId))        {            dict = new Dictionary<string, string>();            results[deviceId] = dict;        }        else        {            dict = results[deviceId];        }        if (partToLogical.ContainsKey(pair.Key))        {            ManagementObject o = partToLogical[pair.Key];            dict.Add((string)o["Name"], (string)o["FileSystem"]);        }    }}finally{    if (diskPartIns != null)    {        diskPartIns.Dispose();        diskPartIns = null;    }    if (diskPartMap != null)    {        diskPartMap.Dispose();        diskPartMap = null;    }    if (partLogicalIns != null)    {        partLogicalIns.Dispose();        partLogicalIns = null;    }    if (partLogicalMap != null)    {        partLogicalMap.Dispose();        partLogicalMap = null;    }}