调用API获取系统信息

首先定义外部API导入DLL

[DllImport("kernel32")]
 public static extern void GetSystemInfo(ref CPU_INFO cpuinfo);
[DllImport("kernel32")]
public static extern void GlobalMemoryStatus(ref MEMORY_INFO meminfo);

结构体定义

MEMORY_INFO

[StructLayout( LayoutKind.Sequential)]
    public struct MEMORY_INFO
    {
        public uint dwLength;
        /// <summary>
        /// 被使用内存(百分率)
        /// </summary>
        public uint dwMemoryLoad;
        /// <summary>
        /// 物理内存(字节)
        /// </summary>
        public uint dwTotalPhys;
        /// <summary>
        /// 可使用的物理内存(字节)
        /// </summary>
        public uint dwAvailPhys;
        /// <summary>
        /// 交换文件总大小(字节)
        /// </summary>
        public uint dwTotalPageFile;
        /// <summary>
        /// 尚可交换文件大小(字节)
        /// </summary>
        public uint dwAvailPageFile;
        /// <summary>
        /// 总虚拟内存(字节)
        /// </summary>
        public uint dwTotalVirtual;
        /// <summary>
        /// 未用虚拟内存(字节)
        /// </summary>
        public uint dwAvailVirtual; 

    }

CPU_INFO

[StructLayout(LayoutKind.Sequential)]
    public struct CPU_INFO
    {
        /// <summary>
        /// CPU的OEM_ID
        /// </summary>
        public uint dwOemId;
        /// <summary>
        /// CPU中的页面大小
        /// </summary>
        public uint dwPageSize;
        /// <summary>
        /// 最小地址
        /// </summary>
        public uint lpMinimumApplicationAddress;
        /// <summary>
        /// 最大地址
        /// </summary>
        public uint lpMaximumApplicationAddress;
        
        public uint dwActiveProcessorMask;
        /// <summary>
        /// CPU个数
        /// </summary>
        public uint dwNumberOfProcessors;
        /// <summary>
        /// CPU的类型
        /// </summary>
        public uint dwProcessorType;
        
        public uint dwAllocationGranularity;
        /// <summary>
        /// CPU等级
        /// </summary>
        public uint dwProcessorLevel;
        
        public uint dwProcessorRevision; 
}

//调用GetSystemInfo函数获取CPU的相关信息
            CPU_INFO CpuInfo;
            CpuInfo = new CPU_INFO();
            GetSystemInfo(ref CpuInfo);
            Console.WriteLine("本计算机中有" + CpuInfo.dwNumberOfProcessors.ToString() + "个CPU");
            Console.WriteLine("CPU的类型为" + CpuInfo.dwProcessorType.ToString());
            Console.WriteLine("CPU等级为" + CpuInfo.dwProcessorLevel.ToString());
            Console.WriteLine("CPU的OEM ID为" + CpuInfo.dwOemId.ToString());
            Console.WriteLine("CPU中的页面大小为" + CpuInfo.dwPageSize.ToString());
            Console.WriteLine("" + CpuInfo.dwActiveProcessorMask.ToString());
            Console.WriteLine("" + CpuInfo.dwAllocationGranularity.ToString());
            Console.WriteLine("" + CpuInfo.dwProcessorRevision.ToString());
            Console.WriteLine("" + CpuInfo.lpMaximumApplicationAddress.ToString());
            Console.WriteLine("" + CpuInfo.lpMinimumApplicationAddress.ToString());
            //调用GlobalMemoryStatus函数获取内存的相关信息
            MEMORY_INFO MemInfo;
            MemInfo = new MEMORY_INFO();
            GlobalMemoryStatus(ref MemInfo);
             //感觉的这个使用率有点假
         Console.WriteLine(MemInfo.dwMemoryLoad.ToString() + "%的内存正在使用");
            Console.WriteLine("物理内存共有" + ((MemInfo.dwTotalPhys/1024)/1024).ToString() + "MB");
            Console.WriteLine("可使用的物理内存有" + ((MemInfo.dwAvailPhys/1024)/1024).ToString() + "MB");
            Console.WriteLine("交换文件总大小为" + ((MemInfo.dwTotalPageFile/1024)/1024).ToString() + "MB");
            Console.WriteLine("尚可交换文件大小为" + ((MemInfo.dwAvailPageFile/1024)/1024).ToString() + "MB");
            Console.WriteLine("总虚拟内存有" + ((MemInfo.dwTotalVirtual/1024)/1024).ToString() + "MB");
            Console.WriteLine("未用虚拟内存有" + ((MemInfo.dwAvailVirtual/1024)/1024).ToString() + "MB");