在.Net中用C#调用Windows系统信息的代码

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

namespace WinShutdown
{
public partial class WinInfo : Form
{
//定义CPU的信息结构
[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 ;
}

[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);

public WinInfo()
{
InitializeComponent();
tmrTime.Start();
}
private void tmrTime_Tick(object sender, 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);
lblDate.Text = StInfo.wYear.ToString() + "年" + StInfo.wMonth.ToString() + "月" + StInfo.wDay.ToString() + "日";
lblTime.Text = (StInfo.wHour + 8).ToString() + "点" + StInfo.wMinute.ToString() + "分" + StInfo.wSecond.ToString() + "秒";
}

}
}

PS:
.Text = 前面的变量我都是用Lable的控件来代替.用于显示在From里...注意:在From里最好用个trimer控件来监听这些Lable控件, 所以我有了trimer控件中的唯一一个事件Tick...

希望对.Net学习的朋友提供一帮助!当然,这些资料都是从网上下载的,我只做了归纳而已...