求助：使用C#获取物理内存量

[fengq802]

需要获取系统的总物理内存量及剩余内存量。
参考了sno888在2008-9-8回复“准确获取内存”的内容，编写的代码如下：
ManagementClass memo = new ManagementClass("Win32_OperatingSystem");
ManagementObjectCollection memoVol = memo.GetInstances();
double capacity = 0;
foreach (ManagementObject mo in memoVol)
{
capacity += ((Math.Round(Int64.Parse(mo.Properties["FreePhysicalMemory"].Value.ToString()) / 1024 / 1024 / 1024.0, 1)));
}
运行上述代码，得到的capacity值为0，是何原因？请教各位高手^^

[EnForGrass]

试试这个http://www.soaspx.com/dotnet/csharp/csharp_20111125_8322.html

[cnfixit]

GlobalMemoryStatus

试试整个

[cnfixit]

MEMORYSTATUS ms = new MEMORYSTATUS();
NativeMethods.GlobalMemoryStatus(out ms);
MessageBox.Show((ms.dwTotalPhys/1024/1024).ToString());

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
    public struct MEMORYSTATUS
    {

        /// DWORD->unsigned int
        public uint dwLength;

        /// DWORD->unsigned int
        public uint dwMemoryLoad;

        /// SIZE_T->ULONG_PTR->unsigned int
        public uint dwTotalPhys;

        /// SIZE_T->ULONG_PTR->unsigned int
        public uint dwAvailPhys;

        /// SIZE_T->ULONG_PTR->unsigned int
        public uint dwTotalPageFile;

        /// SIZE_T->ULONG_PTR->unsigned int
        public uint dwAvailPageFile;

        /// SIZE_T->ULONG_PTR->unsigned int
        public uint dwTotalVirtual;

        /// SIZE_T->ULONG_PTR->unsigned int
        public uint dwAvailVirtual;
    }

    public partial class NativeMethods
    {

        /// Return Type: void
        ///lpBuffer: LPMEMORYSTATUS->_MEMORYSTATUS*
        [System.Runtime.InteropServices.DllImportAttribute("kernel32.dll", EntryPoint = "GlobalMemoryStatus")]
        public static extern void GlobalMemoryStatus([System.Runtime.InteropServices.OutAttribute()] out MEMORYSTATUS lpBuffer);

    }