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#region Windows 窗体设计器生成的代码
  /**//// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.groupBox1 = new System.Windows.Forms.GroupBox();
   this.groupBox2 = new System.Windows.Forms.GroupBox();
   this.groupBox3 = new System.Windows.Forms.GroupBox();
   this.groupBox4 = new System.Windows.Forms.GroupBox();
   this.button1 = new System.Windows.Forms.Button();
   this.Time = new System.Windows.Forms.Label();
   this.Date = new System.Windows.Forms.Label();
   this.TotalPhys = new System.Windows.Forms.Label();
   this.MemoryLoad = new System.Windows.Forms.Label();
   this.AvailPageFile = new System.Windows.Forms.Label();
   this.TotalVirtual = new System.Windows.Forms.Label();
   this.AvailPhys = new System.Windows.Forms.Label();
   this.TotalPageFile = new System.Windows.Forms.Label();
   this.PageSize = new System.Windows.Forms.Label();
   this.OemId = new System.Windows.Forms.Label();
   this.AvailVirtual = new System.Windows.Forms.Label();
   this.ProcessorLevel = new System.Windows.Forms.Label();
   this.NumberOfProcessors = new System.Windows.Forms.Label();
   this.ProcessorType = new System.Windows.Forms.Label();
   this.WindowsDirectory = new System.Windows.Forms.Label();
   this.SystemDirectory = new System.Windows.Forms.Label();
   this.groupBox1.SuspendLayout();
   this.groupBox2.SuspendLayout();
   this.groupBox3.SuspendLayout();
   this.groupBox4.SuspendLayout();
   this.SuspendLayout();
   // 
   // groupBox1
   // 
   this.groupBox1.Controls.Add(this.Date);
   this.groupBox1.Controls.Add(this.Time);
   this.groupBox1.Location = new System.Drawing.Point(8, 16);
   this.groupBox1.Name = "groupBox1";
   this.groupBox1.Size = new System.Drawing.Size(240, 128);
   this.groupBox1.TabIndex = 0;
   this.groupBox1.TabStop = false;
   this.groupBox1.Text = "groupBox1";
   // 
   // groupBox2
   // 
   this.groupBox2.Controls.Add(this.TotalVirtual);
   this.groupBox2.Controls.Add(this.AvailVirtual);
   this.groupBox2.Location = new System.Drawing.Point(296, 24);
   this.groupBox2.Name = "groupBox2";
   this.groupBox2.Size = new System.Drawing.Size(240, 120);
   this.groupBox2.TabIndex = 1;
   this.groupBox2.TabStop = false;
   this.groupBox2.Text = "groupBox2";
   // 
   // groupBox3
   // 
   this.groupBox3.Controls.Add(this.ProcessorType);
   this.groupBox3.Controls.Add(this.NumberOfProcessors);
   this.groupBox3.Controls.Add(this.MemoryLoad);
   this.groupBox3.Controls.Add(this.PageSize);
   this.groupBox3.Controls.Add(this.OemId);
   this.groupBox3.Controls.Add(this.ProcessorLevel);
   this.groupBox3.Location = new System.Drawing.Point(296, 160);
   this.groupBox3.Name = "groupBox3";
   this.groupBox3.Size = new System.Drawing.Size(240, 256);
   this.groupBox3.TabIndex = 1;
   this.groupBox3.TabStop = false;
   this.groupBox3.Text = "groupBox2";
   // 
   // groupBox4
   // 
   this.groupBox4.Controls.Add(this.AvailPageFile);
   this.groupBox4.Controls.Add(this.TotalPageFile);
   this.groupBox4.Controls.Add(this.AvailPhys);
   this.groupBox4.Controls.Add(this.TotalPhys);
   this.groupBox4.Controls.Add(this.WindowsDirectory);
   this.groupBox4.Location = new System.Drawing.Point(16, 160);
   this.groupBox4.Name = "groupBox4";
   this.groupBox4.Size = new System.Drawing.Size(240, 296);
   this.groupBox4.TabIndex = 2;
   this.groupBox4.TabStop = false;
   this.groupBox4.Text = "groupBox2";
   // 
   // button1
   // 
   this.button1.Location = new System.Drawing.Point(248, 456);
   this.button1.Name = "button1";
   this.button1.TabIndex = 3;
   this.button1.Text = "button1";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   // 
   // Time
   // 
   this.Time.Location = new System.Drawing.Point(32, 48);
   this.Time.Name = "Time";
   this.Time.Size = new System.Drawing.Size(160, 23);
   this.Time.TabIndex = 0;
   this.Time.Text = "label1";
   // 
   // Date
   // 
   this.Date.Location = new System.Drawing.Point(32, 96);
   this.Date.Name = "Date";
   this.Date.Size = new System.Drawing.Size(160, 23);
   this.Date.TabIndex = 1;
   this.Date.Text = "label2";
   // 
   // TotalPhys
   // 
   this.TotalPhys.Location = new System.Drawing.Point(32, 208);
   this.TotalPhys.Name = "TotalPhys";
   this.TotalPhys.Size = new System.Drawing.Size(160, 23);
   this.TotalPhys.TabIndex = 2;
   this.TotalPhys.Text = "label3";
   // 
   // MemoryLoad
   // 
   this.MemoryLoad.Location = new System.Drawing.Point(40, 56);
   this.MemoryLoad.Name = "MemoryLoad";
   this.MemoryLoad.Size = new System.Drawing.Size(168, 23);
   this.MemoryLoad.TabIndex = 3;
   this.MemoryLoad.Text = "label4";
   // 
   // AvailPageFile
   // 
   this.AvailPageFile.Location = new System.Drawing.Point(32, 64);
   this.AvailPageFile.Name = "AvailPageFile";
   this.AvailPageFile.Size = new System.Drawing.Size(160, 23);
   this.AvailPageFile.TabIndex = 4;
   this.AvailPageFile.Text = "label5";
   // 
   // TotalVirtual
   // 
   this.TotalVirtual.Location = new System.Drawing.Point(40, 40);
   this.TotalVirtual.Name = "TotalVirtual";
   this.TotalVirtual.Size = new System.Drawing.Size(168, 23);
   this.TotalVirtual.TabIndex = 5;
   this.TotalVirtual.Text = "label6";
   // 
   // AvailPhys
   // 
   this.AvailPhys.Location = new System.Drawing.Point(32, 160);
   this.AvailPhys.Name = "AvailPhys";
   this.AvailPhys.Size = new System.Drawing.Size(160, 23);
   this.AvailPhys.TabIndex = 6;
   this.AvailPhys.Text = "label7";
   // 
   // TotalPageFile
   // 
   this.TotalPageFile.Location = new System.Drawing.Point(32, 112);
   this.TotalPageFile.Name = "TotalPageFile";
   this.TotalPageFile.Size = new System.Drawing.Size(160, 23);
   this.TotalPageFile.TabIndex = 7;
   this.TotalPageFile.Text = "label8";
   // 
   // PageSize
   // 
   this.PageSize.Location = new System.Drawing.Point(40, 96);
   this.PageSize.Name = "PageSize";
   this.PageSize.Size = new System.Drawing.Size(168, 23);
   this.PageSize.TabIndex = 8;
   this.PageSize.Text = "label9";
   // 
   // OemId
   // 
   this.OemId.Location = new System.Drawing.Point(40, 144);
   this.OemId.Name = "OemId";
   this.OemId.Size = new System.Drawing.Size(168, 23);
   this.OemId.TabIndex = 9;
   this.OemId.Text = "label10";
   // 
   // AvailVirtual
   // 
   this.AvailVirtual.Location = new System.Drawing.Point(40, 80);
   this.AvailVirtual.Name = "AvailVirtual";
   this.AvailVirtual.Size = new System.Drawing.Size(168, 23);
   this.AvailVirtual.TabIndex = 10;
   this.AvailVirtual.Text = "label11";
   // 
   // ProcessorLevel
   // 
   this.ProcessorLevel.Location = new System.Drawing.Point(40, 184);
   this.ProcessorLevel.Name = "ProcessorLevel";
   this.ProcessorLevel.Size = new System.Drawing.Size(168, 23);
   this.ProcessorLevel.TabIndex = 11;
   this.ProcessorLevel.Text = "label12";
   // 
   // NumberOfProcessors
   // 
   this.NumberOfProcessors.Location = new System.Drawing.Point(40, 24);
   this.NumberOfProcessors.Name = "NumberOfProcessors";
   this.NumberOfProcessors.Size = new System.Drawing.Size(168, 23);
   this.NumberOfProcessors.TabIndex = 12;
   this.NumberOfProcessors.Text = "label1";
   // 
   // ProcessorType
   // 
   this.ProcessorType.Location = new System.Drawing.Point(40, 216);
   this.ProcessorType.Name = "ProcessorType";
   this.ProcessorType.Size = new System.Drawing.Size(168, 23);
   this.ProcessorType.TabIndex = 13;
   this.ProcessorType.Text = "label2";
   // 
   // WindowsDirectory
   // 
   this.WindowsDirectory.Location = new System.Drawing.Point(32, 24);
   this.WindowsDirectory.Name = "WindowsDirectory";
   this.WindowsDirectory.Size = new System.Drawing.Size(160, 23);
   this.WindowsDirectory.TabIndex = 11;
   this.WindowsDirectory.Text = "label1";
   // 
   // SystemDirectory
   // 
   this.SystemDirectory.Location = new System.Drawing.Point(32, 400);
   this.SystemDirectory.Name = "SystemDirectory";
   this.SystemDirectory.TabIndex = 2;
   this.SystemDirectory.Text = "label2";
   // 
   // Form1
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(568, 507);
   this.Controls.Add(this.button1);
   this.Controls.Add(this.groupBox1);
   this.Controls.Add(this.groupBox2);
   this.Controls.Add(this.groupBox3);
   this.Controls.Add(this.groupBox4);
   this.Controls.Add(this.SystemDirectory);
   this.Name = "Form1";
   this.Text = "Form1";
   this.groupBox1.ResumeLayout(false);
   this.groupBox2.ResumeLayout(false);
   this.groupBox3.ResumeLayout(false);
   this.groupBox4.ResumeLayout(false);
   this.ResumeLayout(false);

  }
  #endregion

  /**//// <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";
  }

  }
 }