如何获得计算机的RAM总量?

14 回复 | 直到 8 年前

1

184

Danny Beckett 10 年前

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

这个 ComputerInfo 类具有您需要的所有信息。

2

64

Ryan Lundy 16 年前

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

3

63

Kissaki 4 年前

windowsapi函数 GlobalMemoryStatusEx 可以使用p/invoke调用:

  [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);

然后使用类似于:

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

TotalPhysicalMemory 在 Win32_ComputerSystem 班

4

37

sstan 9 年前

这里的所有答案,包括被接受的答案,都将给出RAM的总量供使用。这可能就是OP想要的。

但是如果你想得到安装拉姆,那你就给警察打个电话 GetPhysicallyInstalledSystemMemory 作用

从“备注”部分的链接:

GetPhysicallyInstalledSystemMemory 函数从计算机的SMBIOS固件表中检索物理安装的RAM量。这可能与客户报告的金额不同函数,该函数将MemoryStatuex结构的ullTotalPhys成员设置为可供操作系统使用的物理内存量。因为BIOS和某些驱动程序可能会将内存保留为内存映射设备的I/O区域,从而使操作系统和应用程序无法使用内存。

[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.");
}

5

31

grendel 14 年前

如果您碰巧使用的是Mono,那么您可能有兴趣知道Mono 2.8(将于今年晚些时候发布)将有一个性能计数器,用于报告Mono运行的所有平台(包括Windows)上的物理内存大小。您可以使用以下代码段检索计数器的值:

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);
   }
}

here .

6

16

BRAHIM Kamel 5 年前

.net Core 3.0 没有必要使用 PInvoke 平台以获取可用的物理内存。这个 GC GC.GetGCMemoryInfo 返回一个 GCMemoryInfo Struct TotalAvailableMemoryBytes 作为一种财产。此属性返回垃圾收集器的总可用内存。(与MemoryStatuex的值相同)

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

7

15

zgerd 10 年前

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;

8

7

Nilan Niyomal 10 年前

using Microsoft.VisualBasic.Devices;

然后,用户只需使用以下代码

    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();
    }

9

5

basgys 8 年前

// 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";
}

10

5

jrh rahul 8 年前

你可以使用WMI。找到了一个狙击手。

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

11

2

jrh rahul 8 年前

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"))));

12

1

Soroush Falahati 6 年前

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

使用 ComputerInfo PerformanceCounter s用于Mono,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)))
            };
        }
    }
}

13

0

Roman Starkov 10 年前

没有人提到过 GetPerformanceInfo 然而 PInvoke signatures 都有。

承诺限制
委员会讲话
物理总量
系统缓存
内核分页
每页记录条数

PhysicalTotal 是OP要查找的内容,尽管该值是页数,所以要转换为字节,请乘以 PageSize

14

0

hardkoded 7 年前

.NIT对其可访问的内存总量有一个限制。有一个百分比,然后xp中的2GB是硬上限。

同样在64位模式下,有一定百分比的内存可以从系统中使用,因此我不确定您是否可以要求全部内存,或者是否有专门的防范措施。

15

-3

SuMeeT ShaHaPeTi 12 年前

/*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");
}

16

-3

Alberico Francesco 3 年前

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

|

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

(richiede System.management.dll come riferimento,测试su C#con Framework 4.7.2)

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

|

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

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

在“b”中使用“b”和“b”两个字母,在GB中使用“b”和“b”两个字母