运用API函数获取系统信息(转)

运用API函数获取系统信息(转)

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.Text;

namespace WindowsApplication10
{
/**//// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
  private System.Windows.Forms.GroupBox groupBox1;
  private System.Windows.Forms.GroupBox groupBox2;
  private System.Windows.Forms.GroupBox groupBox3;
  private System.Windows.Forms.GroupBox groupBox4;
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.Label AvailVirtual;
  private System.Windows.Forms.Label TotalVirtual;
  private System.Windows.Forms.Label AvailPageFile;
  private System.Windows.Forms.Label TotalPageFile;
  private System.Windows.Forms.Label AvailPhys;
  private System.Windows.Forms.Label TotalPhys;
  private System.Windows.Forms.Label MemoryLoad;
  private System.Windows.Forms.Label PageSize;
  private System.Windows.Forms.Label OemId;
  private System.Windows.Forms.Label ProcessorLevel;
  private System.Windows.Forms.Label ProcessorType;
  private System.Windows.Forms.Label NumberOfProcessors;
  private System.Windows.Forms.Label SystemDirectory;
  private System.Windows.Forms.Label WindowsDirectory;
  private System.Windows.Forms.Label Time;
  private System.Windows.Forms.Label Date;
  /**//// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.Container components = null;
  [DllImport("kernel32")]
  public static extern void GetWindowsDirectory(StringBuilder WinDir,int count);

  [DllImport("kernel32")]
  public static extern void GetSystemDirectory(StringBuilder SysDir,int count);

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

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

  [DllImport("kernel32")]
  public static extern void GetSystemTime(ref SYSTEMTIME_INFO stinfo);

  [StructLayout(LayoutKind.Sequential)]
   public struct CPU_INFO
  {
   public uint dwOemId;
   public uint dwPageSize;
   public uint lpMinimumApplicationAddress;
   public uint lpMaximumApplicationAddress;
   public uint dwActiveProcessorMask;
   public uint dwNumberOfProcessors;
   public uint dwProcessorType;
   public uint dwAllocationGranularity;
   public uint dwProcessorLevel;
   public uint dwProcessorRevision;
  }

  //定义内存的信息结构
  [StructLayout(LayoutKind.Sequential)]
   public struct MEMORY_INFO
  {
   public uint dwLength;
   public uint dwMemoryLoad;
   public uint dwTotalPhys;
   public uint dwAvailPhys;
   public uint dwTotalPageFile;
   public uint dwAvailPageFile;
   public uint dwTotalVirtual;
   public uint dwAvailVirtual;
  }

  //定义系统时间的信息结构
  [StructLayout(LayoutKind.Sequential)]
   public struct SYSTEMTIME_INFO
  {
   public ushort wYear;
   public ushort wMonth;
   public ushort wDayOfWeek;
   public ushort wDay;
   public ushort wHour;
   public ushort wMinute;
   public ushort wSecond;
   public ushort wMilliseconds;
  }

  public Form1()
  {
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();

   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }

  /**//// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  Windows 窗体设计器生成的代码

  /**//// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }

  private void button1_Click(object sender, System.EventArgs e)
  {
   //调用GetWindowsDirectory和GetSystemDirectory函数分别取得Windows路径和系统路径
   const int nChars = 128;
   StringBuilder Buff = new StringBuilder(nChars);
   GetWindowsDirectory(Buff,nChars);
   WindowsDirectory.Text = "Windows路径："+Buff.ToString();
   GetSystemDirectory(Buff,nChars);
   SystemDirectory.Text = "系统路径："+Buff.ToString();

   //调用GetSystemInfo函数获取CPU的相关信息
   CPU_INFO CpuInfo;
   CpuInfo = new CPU_INFO();
   GetSystemInfo(ref CpuInfo);
   NumberOfProcessors.Text = "本计算机中有"+CpuInfo.dwNumberOfProcessors.ToString()+"个CPU";
   ProcessorType.Text = "CPU的类型为"+CpuInfo.dwProcessorType.ToString();
   ProcessorLevel.Text = "CPU等级为"+CpuInfo.dwProcessorLevel.ToString();
   OemId.Text = "CPU的OEM ID为"+CpuInfo.dwOemId.ToString();
   PageSize.Text = "CPU中的页面大小为"+CpuInfo.dwPageSize.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);
   MemoryLoad.Text = MemInfo.dwMemoryLoad.ToString()+"%的内存正在使用";
   TotalPhys.Text = "物理内存共有"+MemInfo.dwTotalPhys.ToString()+"字节";
   AvailPhys.Text = "可使用的物理内存有"+MemInfo.dwAvailPhys.ToString()+"字节";
   TotalPageFile.Text = "交换文件总大小为"+MemInfo.dwTotalPageFile.ToString()+"字节";
   AvailPageFile.Text = "尚可交换文件大小为"+MemInfo.dwAvailPageFile.ToString()+"字节";
   TotalVirtual.Text = "总虚拟内存有"+MemInfo.dwTotalVirtual.ToString()+"字节";
   AvailVirtual.Text = "未用虚拟内存有"+MemInfo.dwAvailVirtual.ToString()+"字节";

   //调用GetSystemTime函数获取系统时间信息
   SYSTEMTIME_INFO StInfo;
   StInfo = new SYSTEMTIME_INFO();
   GetSystemTime(ref StInfo);
   Date.Text = StInfo.wYear.ToString()+"年"+StInfo.wMonth.ToString()+"月"+StInfo.wDay.ToString()+"日";
   Time.Text = (StInfo.wHour+8).ToString()+"点"+StInfo.wMinute.ToString()+"分"+StInfo.wSecond.ToString()+"秒";
  }

  }
}
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原文地址：https://www.cnblogs.com/jhtchina/p/334855.html