Question

使用C＃，我想得到我的电脑所拥有的RAM总量。使用PerformanceCounter，我可以通过设置：

获得可用ram的数量

counter.CategoryName = "Memory";
counter.Countername = "Available MBytes";

但我似乎无法找到获得总内存量的方法。我该怎么做呢？

更新

MagicKat：我在搜索时看到了它，但它不起作用 - “你错过了程序集或引用吗？”。我已经将其添加到参考文献中，但我没有在那里看到它。

Answer 1

添加对Microsoft.VisualBasic和using Microsoft.VisualBasic.Devices;的引用。

ComputerInfo类包含您需要的所有信息。

Answer 2

p / invoke方式编辑：更改为GlobalMemoryStatusEx以提供准确的结果（呵呵）

  [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
  private class MEMORYSTATUSEX
  {
     public uint dwLength;
     public uint dwMemoryLoad;
     public ulong ullTotalPhys;
     public ulong ullAvailPhys;
     public ulong ullTotalPageFile;
     public ulong ullAvailPageFile;
     public ulong ullTotalVirtual;
     public ulong ullAvailVirtual;
     public ulong ullAvailExtendedVirtual;
     public MEMORYSTATUSEX()
     {
        this.dwLength = (uint)Marshal.SizeOf(typeof(NativeMethods.MEMORYSTATUSEX));
     }
  }


  [return: MarshalAs(UnmanagedType.Bool)]
  [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
  static extern bool GlobalMemoryStatusEx([In, Out] MEMORYSTATUSEX lpBuffer);

然后使用：

ulong installedMemory;
MEMORYSTATUSEX memStatus = new MEMORYSTATUSEX();
if( GlobalMemoryStatusEx( memStatus))
{ 
   installedMemory = memStatus.ullTotalPhys;
}

或者您可以使用WMI（托管但速度较慢）来查询“Win32_ComputerSystem”类中的“TotalPhysicalMemory”。

来自joel-llamaduck.blogspot.com的每条评论的

编辑修正代码

Answer 3

添加对Microsoft.VisualBasic.dll的引用，如上所述。然后获得总物理内存就像这样简单（是的，我测试过它）：

static ulong GetTotalMemoryInBytes()
{
    return new Microsoft.VisualBasic.Devices.ComputerInfo().TotalPhysicalMemory;
}

Answer 4

如果您正在使用Mono，那么您可能有兴趣知道Mono 2.8（将于今年晚些时候发布）将具有一个性能计数器，该计数器报告Mono运行的所有平台上的物理内存大小（包括Windows ）。您可以使用以下代码片段检索计数器的值：

using System;
using System.Diagnostics;

class app
{
   static void Main ()
   {
       var pc = new PerformanceCounter ("Mono Memory", "Total Physical Memory");
       Console.WriteLine ("Physical RAM (bytes): {0}", pc.RawValue);
   }
}

如果您对提供性能计数器的C代码感兴趣，可以找到here。

Answer 5

此处的所有答案（包括已接受的答案）都会为您提供可用的可用的总RAM。这可能是OP想要的。

但如果您有兴趣获取 已安装 RAM的数量，那么您需要调用GetPhysicallyInstalledSystemMemory函数。

从链接中，在备注部分：

GetPhysicallyInstalledSystemMemory 函数从计算机的SMBIOS固件表中检索物理安装的RAM量。这可能与 GlobalMemoryStatusEx 函数报告的数量不同，后者将MEMORYSTATUSEX结构的ullTotalPhys成员设置为可供操作系统使用的物理内存量。 操作系统可用的内存量可能小于计算机中物理安装的内存量 ，因为BIOS和某些驱动程序可能会将内存保留为I / O区域对于内存映射设备，使内存对操作系统和应用程序不可用。

示例代码：

[DllImport("kernel32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GetPhysicallyInstalledSystemMemory(out long TotalMemoryInKilobytes);

static void Main()
{
    long memKb;
    GetPhysicallyInstalledSystemMemory(out memKb);
    Console.WriteLine((memKb / 1024 / 1024) + " GB of RAM installed.");
}

Answer 6

另一种方法是使用.NET System.Management查询工具：

string Query = "SELECT Capacity FROM Win32_PhysicalMemory";
ManagementObjectSearcher searcher = new ManagementObjectSearcher(Query);

UInt64 Capacity = 0;
foreach (ManagementObject WniPART in searcher.Get())
{
    Capacity += Convert.ToUInt64(WniPART.Properties["Capacity"].Value);
}

return Capacity;

Answer 7

您只需使用此代码即可获取这些信息，只需添加参考

即可

using Microsoft.VisualBasic.Devices;

并简单地使用以下代码

    private void button1_Click(object sender, EventArgs e)
    {
        getAvailableRAM();
    }

    public void getAvailableRAM()
    {
        ComputerInfo CI = new ComputerInfo();
        ulong mem = ulong.Parse(CI.TotalPhysicalMemory.ToString());
        richTextBox1.Text = (mem / (1024*1024) + " MB").ToString();
    }

Answer 8

您可以使用WMI。发现了一个snippit。

Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" _ 
& strComputer & "\root\cimv2") 
Set colComputer = objWMIService.ExecQuery _
("Select * from Win32_ComputerSystem")

For Each objComputer in colComputer 
  strMemory = objComputer.TotalPhysicalMemory
Next

Answer 9

// use `/ 1048576` to get ram in MB
// and `/ (1048576 * 1024)` or `/ 1048576 / 1024` to get ram in GB
private static String getRAMsize()
{
    ManagementClass mc = new ManagementClass("Win32_ComputerSystem");
    ManagementObjectCollection moc = mc.GetInstances();
    foreach (ManagementObject item in moc)
    {
       return Convert.ToString(Math.Round(Convert.ToDouble(item.Properties["TotalPhysicalMemory"].Value) / 1048576, 0)) + " MB";
    }

    return "RAMsize";
}

Answer 10

此功能（ManagementQuery）适用于Windows XP及更高版本：

private static string ManagementQuery(string query, string parameter, string scope = null) {
    string result = string.Empty;
    var searcher = string.IsNullOrEmpty(scope) ? new ManagementObjectSearcher(query) : new ManagementObjectSearcher(scope, query);
    foreach (var os in searcher.Get()) {
        try {
            result = os[parameter].ToString();
        }
        catch {
            //ignore
        }

        if (!string.IsNullOrEmpty(result)) {
            break;
        }
    }

    return result;
}

用法：

Console.WriteLine(BytesToMb(Convert.ToInt64(ManagementQuery("SELECT TotalPhysicalMemory FROM Win32_ComputerSystem", "TotalPhysicalMemory", "root\\CIMV2"))));

Answer 11

.NIT对可以访问的总内存量有限制。这是一个百分比，然后xp中的2 GB是硬顶。

你可能有4 GB，当它达到2GB时会杀死它。

同样在64位模式下，你可以在系统中使用一定比例的内存，所以我不确定你是否可以要求全部内容，或者是否有特别防范。

Answer 12

还没有人提到GetPerformanceInfo。 PInvoke signatures可用。

此功能可提供以下系统范围的信息：

CommitTotal
CommitLimit
CommitPeak
PhysicalTotal
PhysicalAvailable
SystemCache
KernelTotal
KernelPaged
KernelNonpaged
每页
HandleCount
ProcessCount
THREADCOUNT

PhysicalTotal是OP正在寻找的，虽然该值是页数，因此要转换为字节，请乘以返回的PageSize值。

Answer 13

与.Net和Mono兼容（已通过Win10 / FreeBSD / CentOS测试）

为Mono使用ComputerInfo源代码和PerformanceCounter，并作为.Net的备份：

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Security;

public class SystemMemoryInfo
{
    private readonly PerformanceCounter _monoAvailableMemoryCounter;
    private readonly PerformanceCounter _monoTotalMemoryCounter;
    private readonly PerformanceCounter _netAvailableMemoryCounter;

    private ulong _availablePhysicalMemory;
    private ulong _totalPhysicalMemory;

    public SystemMemoryInfo()
    {
        try
        {
            if (PerformanceCounterCategory.Exists("Mono Memory"))
            {
                _monoAvailableMemoryCounter = new PerformanceCounter("Mono Memory", "Available Physical Memory");
                _monoTotalMemoryCounter = new PerformanceCounter("Mono Memory", "Total Physical Memory");
            }
            else if (PerformanceCounterCategory.Exists("Memory"))
            {
                _netAvailableMemoryCounter = new PerformanceCounter("Memory", "Available Bytes");
            }
        }
        catch
        {
            // ignored
        }
    }

    public ulong AvailablePhysicalMemory
    {
        [SecurityCritical]
        get
        {
            Refresh();

            return _availablePhysicalMemory;
        }
    }

    public ulong TotalPhysicalMemory
    {
        [SecurityCritical]
        get
        {
            Refresh();

            return _totalPhysicalMemory;
        }
    }

    [SecurityCritical]
    [DllImport("Kernel32", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern void GlobalMemoryStatus(ref MEMORYSTATUS lpBuffer);

    [SecurityCritical]
    [DllImport("Kernel32", CharSet = CharSet.Auto, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool GlobalMemoryStatusEx(ref MEMORYSTATUSEX lpBuffer);

    [SecurityCritical]
    private void Refresh()
    {
        try
        {
            if (_monoTotalMemoryCounter != null && _monoAvailableMemoryCounter != null)
            {
                _totalPhysicalMemory = (ulong) _monoTotalMemoryCounter.NextValue();
                _availablePhysicalMemory = (ulong) _monoAvailableMemoryCounter.NextValue();
            }
            else if (Environment.OSVersion.Version.Major < 5)
            {
                var memoryStatus = MEMORYSTATUS.Init();
                GlobalMemoryStatus(ref memoryStatus);

                if (memoryStatus.dwTotalPhys > 0)
                {
                    _availablePhysicalMemory = memoryStatus.dwAvailPhys;
                    _totalPhysicalMemory = memoryStatus.dwTotalPhys;
                }
                else if (_netAvailableMemoryCounter != null)
                {
                    _availablePhysicalMemory = (ulong) _netAvailableMemoryCounter.NextValue();
                }
            }
            else
            {
                var memoryStatusEx = MEMORYSTATUSEX.Init();

                if (GlobalMemoryStatusEx(ref memoryStatusEx))
                {
                    _availablePhysicalMemory = memoryStatusEx.ullAvailPhys;
                    _totalPhysicalMemory = memoryStatusEx.ullTotalPhys;
                }
                else if (_netAvailableMemoryCounter != null)
                {
                    _availablePhysicalMemory = (ulong) _netAvailableMemoryCounter.NextValue();
                }
            }
        }
        catch
        {
            // ignored
        }
    }

    private struct MEMORYSTATUS
    {
        private uint dwLength;
        internal uint dwMemoryLoad;
        internal uint dwTotalPhys;
        internal uint dwAvailPhys;
        internal uint dwTotalPageFile;
        internal uint dwAvailPageFile;
        internal uint dwTotalVirtual;
        internal uint dwAvailVirtual;

        public static MEMORYSTATUS Init()
        {
            return new MEMORYSTATUS
            {
                dwLength = checked((uint) Marshal.SizeOf(typeof(MEMORYSTATUS)))
            };
        }
    }

    private struct MEMORYSTATUSEX
    {
        private uint dwLength;
        internal uint dwMemoryLoad;
        internal ulong ullTotalPhys;
        internal ulong ullAvailPhys;
        internal ulong ullTotalPageFile;
        internal ulong ullAvailPageFile;
        internal ulong ullTotalVirtual;
        internal ulong ullAvailVirtual;
        internal ulong ullAvailExtendedVirtual;

        public static MEMORYSTATUSEX Init()
        {
            return new MEMORYSTATUSEX
            {
                dwLength = checked((uint) Marshal.SizeOf(typeof(MEMORYSTATUSEX)))
            };
        }
    }
}

Answer 14

对于使用.net Core 3.0的用户，无需使用PInvoke平台即可获取可用的物理内存。 GC类添加了一个新方法GC.GetGCMemoryInfo，该方法返回一个GCMemoryInfo Struct作为属性的TotalAvailableMemoryBytes。此属性返回垃圾收集器的总可用内存。（与MEMORYSTATUSEX相同的值）

var gcMemoryInfo = GC.GetGCMemoryInfo();
installedMemory = gcMemoryInfo.TotalAvailableMemoryBytes;
// it will give the size of memory in MB
var physicalMemory = (double) installedMemory / 1048576.0;

Answer 15

/*The simplest way to get/display total physical memory in VB.net (Tested)

public sub get_total_physical_mem()

    dim total_physical_memory as integer

    total_physical_memory=CInt((My.Computer.Info.TotalPhysicalMemory) / (1024 * 1024))
    MsgBox("Total Physical Memory" + CInt((My.Computer.Info.TotalPhysicalMemory) / (1024 * 1024)).ToString + "Mb" )
end sub
*/


//The simplest way to get/display total physical memory in C# (converted Form http://www.developerfusion.com/tools/convert/vb-to-csharp)

public void get_total_physical_mem()
{
    int total_physical_memory = 0;

    total_physical_memory = Convert.ToInt32((My.Computer.Info.TotalPhysicalMemory) /  (1024 * 1024));
    Interaction.MsgBox("Total Physical Memory" + Convert.ToInt32((My.Computer.Info.TotalPhysicalMemory) / (1024 * 1024)).ToString() + "Mb");
}

Answer 16

var ram = new ManagementObjectSearcher("select * from Win32_PhysicalMemory") .Get().Cast<ManagementObject>().First();

|

var a = Convert.ToInt64(ram["Capacity"]) / 1024 / 1024 / 1024;

(richiede System.Managment.dll 来 riferimento, testato su C# con Framework 4.7.2)

questa procedura salva in "a" la ram totale presente in GB

ulong memory() { return new Microsoft.VisualBasic.Devices.ComputerInfo().TotalPhysicalMemory; }

|

var b = Convert.ToDecimal(memory()) / 1024 / 1024 / 1024;

(richiede Microsoft.VisualBasics.dll 来 riferimento, testato su C# Framework 4.7.2)

questa procedura salva in "b" il valore della ram in GB effettivamente disponibile

你如何获得计算机的RAM总量？

16 个答案: