How to get total physical memory (ram) information in GB by WMI query?

问题

I know how to get total physical memory from win32_computersystem class. but that comes in bytes or kb. I want this information in MB or GB. in wmi (wql) query. wmic also work. thanks in advance.

回答1:

You must convert the value of the property manually. Also is better use Win32_PhysicalMemory WMI class.

Try this sample

using System;
using System.Collections.Generic;
using System.Management;
using System.Text;

namespace GetWMI_Info
{
    class Program
    {

        static void Main(string[] args)
        {
            try
            {
                ManagementScope Scope;
                Scope = new ManagementScope(String.Format("\\\\{0}\\root\\CIMV2", "."), null);

                Scope.Connect();
                ObjectQuery Query = new ObjectQuery("SELECT Capacity FROM Win32_PhysicalMemory");
                ManagementObjectSearcher Searcher = new ManagementObjectSearcher(Scope, Query);
                UInt64 Capacity = 0;
                foreach (ManagementObject WmiObject in Searcher.Get())
                {
                    Capacity+= (UInt64) WmiObject["Capacity"];
                }
                Console.WriteLine(String.Format("Physical Memory {0} gb", Capacity / (1024 * 1024 * 1024))); 
                Console.WriteLine(String.Format("Physical Memory {0} mb", Capacity / (1024 * 1024)));
            }
            catch (Exception e)
            {
                Console.WriteLine(String.Format("Exception {0} Trace {1}", e.Message, e.StackTrace));
            }
            Console.WriteLine("Press Enter to exit");
            Console.Read();
        }
    }
}

回答2:

you can convert TotalPhysicalMemory of Win32_ComputerSystem. Try this :

using System;
using System.Management;
namespace WMISample
{
    public class MyWMIQuery
    {
        public static void Main()
        {
            try
            {
                ManagementObjectSearcher searcher =
                    new ManagementObjectSearcher("root\\CIMV2",
                    "SELECT TotalPhysicalMemory FROM Win32_ComputerSystem");

                foreach (ManagementObject queryObj in searcher.Get())
                { 
                    double dblMemory;
                    if(double.TryParse(Convert.ToString(queryObj["TotalPhysicalMemory"]),out dblMemory))
                    {
                        Console.WriteLine("TotalPhysicalMemory is: {0} MB", Convert.ToInt32(dblMemory/(1024*1024)));
                        Console.WriteLine("TotalPhysicalMemory is: {0} GB", Convert.ToInt32(dblMemory /(1024*1024*1024)));
                    }
                }
            }
            catch (ManagementException e)
            {

            }
        }
    }
}

回答3:

Wanted to make mention that I used the Win32_PhysicalMemory Capacity property until I met inconsistent results on Windows Server 2012. Now I use both properties (Win32_ComputerSystem:TotalPhysicalMemory and Win32_PhysicalMemory:Capacity) and choose the larger of the two.

来源：https://stackoverflow.com/questions/16041249/how-to-get-total-physical-memory-ram-information-in-gb-by-wmi-query