运用API函数获取系统信息

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
{
///

1<summary>   
2/// Form1 的摘要说明。   
3/// </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;
///

1<summary>   
2/// 必需的设计器变量。   
3/// </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
//
}

///

1<summary>   
2/// 清理所有正在使用的资源。   
3/// </summary>

protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows 窗体设计器生成的代码
///

1<summary>   
2/// 设计器支持所需的方法 - 不要使用代码编辑器修改   
3/// 此方法的内容。   
4/// </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

///

1<summary>   
2/// 应用程序的主入口点。   
3/// </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";
}

}
}