从远程计算机获取驱动器信息

Question

我可以从这篇文章:使用c-net的远程桌面查看远程连接的pc。但我不需要它。我只要连上那台电脑，就能得到C盘的空闲空间数据。我怎么能这么做?我可以连接到远程桌面。我可以使用IO命名空间获得driveInfo。但是如何把它们结合起来呢?

Answer 1

使用System.Management命名空间和Win32_Volume WMI类。您可以查询具有DriveLetter或C:的实例，并检索其FreeSpace属性，如下所示:

ManagementPath path = new ManagementPath() {
    NamespacePath = @"rootcimv2",
    Server = "<REMOTE HOST OR IP>"
};
ManagementScope scope = new ManagementScope(path);
string condition = "DriveLetter = 'C:'";
string[] selectedProperties = new string[] { "FreeSpace" };
SelectQuery query = new SelectQuery("Win32_Volume", condition, selectedProperties);
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query))
using (ManagementObjectCollection results = searcher.Get())
{
    ManagementObject volume = results.Cast<ManagementObject>().SingleOrDefault();
    if (volume != null)
    {
        ulong freeSpace = (ulong) volume.GetPropertyValue("FreeSpace");
        // Use freeSpace here...
    }
}

还有一个Capacity属性用来存储卷的总大小

Answer 2

花了一整天的时间尝试让WMI远程工作但没有成功，我发现了使用性能计数器的替代方法。只需检查LogicalDisk类别中的Free Megabytes计数器，使用所需的驱动器号(以":"结尾)作为实例名，即可获得驱动器可用空闲空间的最新读数:

"LogicalDisk(C:)Free Megabytes"

你可以在c#中通过PerformanceCounter类编程地访问它。

要远程访问它，您需要向性能计数器类构造函数指定服务器名称，并且必须将模拟帐户添加到"性能监视器用户"中。组:

net localgroup "Performance Monitor Users" %username% /add

Answer 3

这里是vb.net等效的，以防您需要翻译它。

        Dim path = New ManagementPath With {.NamespacePath = "rootcimv2",
                                          .Server = "<REMOTE HOST OR IP>"}
    Dim scope = New ManagementScope(path)
    Dim condition = "DriveLetter = 'C:'"
    Dim selectedProperties = {"FreeSpace"}
    Dim query = New SelectQuery("Win32_Volume", condition, selectedProperties)
    Dim searcher = New ManagementObjectSearcher(scope, query)
    Dim results = searcher.Get()
    Dim volume = results.Cast(Of ManagementObject).SingleOrDefault()
    If volume IsNot Nothing Then
        Dim freeSpace As ULong = volume.GetPropertyValue("FreeSpace")
    End If