C#实现cpu信息的查询

 1 class CpuHelper
 2     {
 3 
 4         #region 变量、属性
 5         private static float cpuRate=0f;//声明cpu使用率变量
 6 
 7         public static float CpuRate
 8         {
 9             get { return cpuRate; }
10             set { cpuRate = value; }
11         }
12         private static Thread hThread = null;//获取CPU使用率的线程
13         private static bool isRunning = false;//线程状态的标志
14 
15         private const string CategoryName = "Processor";
16         private const string CounterName = "% Processor Time";//PerformanceCounter三个参数
17         private const string InstanceName = "_Total";
18 
19         #endregion
20 
21         #region 获取CPU硬件信息
22 
23         /// <summary>
24         /// 获取当前电脑CPU的频率
25         /// </summary>
26         /// <returns></returns>
27         public static int GetCPUFrequency()
28         {
29             RegistryKey r = Registry.LocalMachine.OpenSubKey(@"HARDWAREDESCRIPTIONSystemCentralProcessor");
30             object c = r.GetValue("~MHz");
31             int CpuFrequency = (int)c;
32             return CpuFrequency;
33         }
34 
35 
36         #endregion
37 
38         #region 获取CPU的使用率
39         /// <summary>
40         /// 获取CPU使用率信息,由于CPU使用率是即时信息，采用线程获取
41         /// </summary>
42         /// <returns></returns>
43         public static float GetCpuRate()
44         {
45             if (!isRunning && hThread == null)
46             {
47                 isRunning = true;
48                 hThread = new System.Threading.Thread(new System.Threading.ThreadStart(CpuWork));
49                 if (hThread != null)
50                 {
51                     hThread.Start();
52                 }
53             }
54             return cpuRate;
55         }
56 
57         /// <summary>
58         /// 停止获取线程
59         /// </summary>
60         public static void StopGetCpuWork()
61         {
62             isRunning = false;
63 
64             if (hThread != null)
65             {
66                 if (hThread.IsAlive)
67                     hThread.Abort();
68 
69                 hThread = null;
70             }
71         }
72 
73         /// <summary>
74         /// 
75         /// </summary>
76         private static void CpuWork()
77         {
78             try
79             {
80                 PerformanceCounter pc = new PerformanceCounter(CategoryName, CounterName, InstanceName);
81                 while (isRunning)
82                 {
83                     System.Threading.Thread.Sleep(1000); // wait for 1 second
84                     float cpuLoad = pc.NextValue();
85                     cpuRate = cpuLoad;
86                 }
87             }
88             catch (Exception ex)
89             {
90                 Console.WriteLine("获取CPU工作线程方法 异常:" + ex.Message);
91             }
92         }
93 
94         #endregion
95     }
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