C#获取CPU占用率、内存占用、磁盘占用、进程信息

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using System.IO;
using System.Text;
using System.Management;
using System.Runtime.InteropServices;
namespace Lemony.SystemInfo
{
///
/// 系统信息类 - 获取CPU、内存、磁盘、进程信息
///
public class SystemInfo
{
private int m_ProcessorCount = 0; //CPU个数
private PerformanceCounter pcCpuLoad; //CPU计数器
private long m_PhysicalMemory = 0; //物理内存
private const int GW_HWNDFIRST = 0;
private const int GW_HWNDNEXT = 2;
private const int GWL_STYLE = (-16);
private const int WS_VISIBLE = 268435456;
private const int WS_BORDER = 8388608;
#region API声明
[DllImport("IpHlpApi.dll")]
extern static public uint GetIfTable(byte[] pIfTable, ref uint pdwSize, bool bOrder);
[DllImport("User32")]
private extern static int GetWindow(int hWnd, int wCmd);
[DllImport("User32")]
private extern static int GetWindowLongA(int hWnd, int wIndx);
[DllImport("user32.dll")]
private static extern bool GetWindowText(int hWnd, StringBuilder title, int maxBufSize);
[DllImport("user32", CharSet = CharSet.Auto)]
private extern static int GetWindowTextLength(IntPtr hWnd);
#endregion
#region 构造函数
///
/// 构造函数，初始化计数器等
///
public SystemInfo()
{
//初始化CPU计数器
pcCpuLoad = new PerformanceCounter("Processor", "% Processor Time", "_Total");
pcCpuLoad.MachineName = ".";
pcCpuLoad.NextValue();
//CPU个数
m_ProcessorCount = Environment.ProcessorCount;
//获得物理内存
ManagementClass mc = new ManagementClass("Win32_ComputerSystem");
ManagementObjectCollection moc = mc.GetInstances();
foreach (ManagementObject mo in moc)
{
if (mo["TotalPhysicalMemory"] != null)
{
m_PhysicalMemory = long.Parse(mo["TotalPhysicalMemory"].ToString());
}
}
}
#endregion
#region CPU个数
///
/// 获取CPU个数
///
public int ProcessorCount
{
get
{
return m_ProcessorCount;
}
}
#endregion
#region CPU占用率
///
/// 获取CPU占用率
///
public float CpuLoad
{
get
{
return pcCpuLoad.NextValue();
}
}
#endregion
#region 可用内存
///
/// 获取可用内存
///
public long MemoryAvailable
{
get
{
long availablebytes = 0;
//ManagementObjectSearcher mos = new ManagementObjectSearcher("SELECT * FROM Win32_PerfRawData_PerfOS_Memory");
//foreach (ManagementObject mo in mos.Get())
//{
// availablebytes = long.Parse(mo["Availablebytes"].ToString());
//}
ManagementClass mos = new ManagementClass("Win32_OperatingSystem");
foreach (ManagementObject mo in mos.GetInstances())
{
if (mo["FreePhysicalMemory"] != null)
{
availablebytes = 1024 * long.Parse(mo["FreePhysicalMemory"].ToString());
}
}
return availablebytes;
}
}
#endregion
#region 物理内存
///
/// 获取物理内存
///
public long PhysicalMemory
{
get
{
return m_PhysicalMemory;
}
}
#endregion
#region 获得分区信息
///
/// 获取分区信息
///
public List GetLogicalDrives()
{
List drives = new List();
ManagementClass diskClass = new ManagementClass("Win32_LogicalDisk");
ManagementObjectCollection disks = diskClass.GetInstances();
foreach (ManagementObject disk in disks)
{
// DriveType.Fixed 为固定磁盘(硬盘)
if (int.Parse(disk["DriveType"].ToString()) == (int)DriveType.Fixed)
{
drives.Add(new DiskInfo(disk["Name"].ToString(), long.Parse(disk["Size"].ToString()), long.Parse(disk["FreeSpace"].ToString())));
}
}
return drives;
}
///
/// 获取特定分区信息
///
/// 盘符
public List GetLogicalDrives(char DriverID)
{
List drives = new List();
WqlObjectQuery wmiquery = new WqlObjectQuery("SELECT * FROM Win32_LogicalDisk WHERE DeviceID = ’" + DriverID + ":’");
ManagementObjectSearcher wmifind = new ManagementObjectSearcher(wmiquery);
foreach (ManagementObject disk in wmifind.Get())
{
if (int.Parse(disk["DriveType"].ToString()) == (int)DriveType.Fixed)
{
drives.Add(new DiskInfo(disk["Name"].ToString(), long.Parse(disk["Size"].ToString()), long.Parse(disk["FreeSpace"].ToString())));
}
}
return drives;
}
#endregion
#region 获得进程列表
///
/// 获得进程列表
///
public List GetProcessInfo()
{
List pInfo = new List();
Process[] processes = Process.GetProcesses();
foreach (Process instance in processes)
{
try
{
pInfo.Add(new ProcessInfo(instance.Id,
instance.ProcessName,
instance.TotalProcessorTime.TotalMilliseconds,
instance.WorkingSet64,
instance.MainModule.FileName));
}
catch { }
}
return pInfo;
}
///
/// 获得特定进程信息
///
/// 进程名称
public List GetProcessInfo(string ProcessName)
{
List pInfo = new List();
Process[] processes = Process.GetProcessesByName(ProcessName);
foreach (Process instance in processes)
{
try
{
pInfo.Add(new ProcessInfo(instance.Id,
instance.ProcessName,
instance.TotalProcessorTime.TotalMilliseconds,
instance.WorkingSet64,
instance.MainModule.FileName));
}
catch { }
}
return pInfo;
}
#endregion
#region 结束指定进程
///
/// 结束指定进程
///
/// 进程的 Process ID
public static void EndProcess(int pid)
{
try
{
Process process = Process.GetProcessById(pid);
process.Kill();
}
catch { }
}
#endregion
#region 查找所有应用程序标题
///
/// 查找所有应用程序标题
///
/// 应用程序标题范型
public static List FindAllApps(int Handle)
{
List Apps = new List();
int hwCurr;
hwCurr = GetWindow(Handle, GW_HWNDFIRST);
while (hwCurr > 0)
{
int IsTask = (WS_VISIBLE | WS_BORDER);
int lngStyle = GetWindowLongA(hwCurr, GWL_STYLE);
bool TaskWindow = ((lngStyle & IsTask) == IsTask);
if (TaskWindow)
{
int length = GetWindowTextLength(new IntPtr(hwCurr));
StringBuilder sb = new StringBuilder(2 * length + 1);
GetWindowText(hwCurr, sb, sb.Capacity);
string strTitle = sb.ToString();
if (!string.IsNullOrEmpty(strTitle))
{
Apps.Add(strTitle);
}
}
hwCurr = GetWindow(hwCurr, GW_HWNDNEXT);
}
return Apps;
}
#endregion
}
}