请帮忙看看,CPU站用率代码错在那里?

[cainiao000]

string CategoryName = "Processor";
string CounterName = "% Processor Time";
string InstanceName = "_Total";


PerformanceCounter pc= new PerformanceCounter(CategoryName,CounterName,InstanceName);

float cpuLoad = pc.NextValue();
label2.Text="CPU:"+ cpuLoad + " %";
----------------------------------------------------------
在我计算机上不断刷新还是'CPU:0%',而企业管理器中却有非零数值.

我是在这里参考的.
http://www.programfan.com/showarticle.asp?id=2249

[cainiao000]

更正:
在我计算机上不断刷新还是'CPU:0%',而任务管理器中却有非零数值.

[flyskywlh]

你是将它的代码原样复制过来的吗?

[cainiao000]

是的.

[stephenZL]

float cpuLoad = pc.NextValue();
label2.Text="CPU:"+ cpuLoad + " %";
代码放在Timer1_tick事件里面,然后将Timer1的Enable设为true,interval设为1000,表示每一秒钟对CPU占用率做一次采样,然后打出来

[cainiao000]

PerformanceCounter pc= new PerformanceCounter(CategoryName,CounterName,InstanceName);

float cpuLoad = pc.NextValue();
label2.Text="CPU:"+ cpuLoad + " %";


这部分代码我放在一个按钮事件下面,不停点按钮还是'CPU:0%'.

[liulxmooo]

up

[stephenZL]

PerformanceCounter pc= new PerformanceCounter(CategoryName,CounterName,InstanceName);
不能放在按钮事件,放在Form1_Load里面!

[hanbinghai]

private const string CounterName = "% Processor Time";?
我怎么没发现有呢？

using System.Diagnostics;
using System.Threading;
......
private void Form1_Load(object sender, System.EventArgs e)
{
PerformanceCounterCategory[] myCat2;
myCat2 = PerformanceCounterCategory.GetCategories();
for (int i=0;i<myCat2.Length;i++)
{
if("Processor" == myCat2[i].CategoryName)
{
Debug.WriteLine("CategoryName: ");
Debug.Write(myCat2[i].CategoryName);

Debug.WriteLine("CategoryName: ");
string[] str =myCat2[i].GetInstanceNames();
for(int k=0;k< str.Length;k++)
{
Debug.WriteLine(k.ToString() + " " + str[k]);
PerformanceCounter[] per = myCat2[i].GetCounters(str[k]);
Debug.WriteLine("PerformanceCounter: ");
for(int j=0;j<per.Length;j++)
{
Debug.WriteLine(" (" + j.ToString() + ") " +per[j].CounterName);
}
}

}
}
}
我输出的结果是：
CategoryName:
ProcessorCategoryName:
0 _Total
PerformanceCounter:
(0) % Processor Time
(1) % User Time
(2) % Privileged Time
(3) Interrupts/sec
(4) % DPC Time
(5) % Interrupt Time
(6) DPCs Queued/sec
(7) DPC Rate
(8) % Idle Time
(9) % C1 Time
(10) % C2 Time
(11) % C3 Time
(12) C1 Transitions/sec
(13) C2 Transitions/sec
(14) C3 Transitions/sec
1 0
PerformanceCounter:
(0) % Processor Time
(1) % User Time
(2) % Privileged Time
(3) Interrupts/sec
(4) % DPC Time
(5) % Interrupt Time
(6) DPCs Queued/sec
(7) DPC Rate
(8) % Idle Time
(9) % C1 Time
(10) % C2 Time
(11) % C3 Time
(12) C1 Transitions/sec
(13) C2 Transitions/sec
(14) C3 Transitions/sec

[hanbinghai]

^_^，开始没注意，性能计数器名称里有"% Processor Time"

[nga96]

这个代码编译能通过么

[lucbesson]

你写在winform下还是win32控制台应用程序下啊 ？

你也没贴出你写在什么地方，如果在winform下要做一下改动的，如果不是，没什么错啊，
我调试了一下。
winfrom下 使用timer来替换sleep方法 ！