C#获取当前CPU,内存使用详情及常用WMI查询语句

1，获取当前CPU使用率（需添加System.Management.dll）：

string queryStr = "select * from win32_processor";
            System.Management.ManagementObjectSearcher searcher = new System.Management.ManagementObjectSearcher(queryStr);
            //假设只有一个CPU
            double loadPercentage = 0;//CPU使用率(百分比的值)
foreach (System.Management.ManagementObject item in searcher.Get())
{
      loadPercentage = double.Parse(item["LoadPercentage"].ToString());
}

2，获取当前内存使用率(需添加 Microsoft.VisualBasic.dll):

Microsoft.VisualBasic.Devices.ComputerInfo pc = new Microsoft.VisualBasic.Devices.ComputerInfo();
            textBox1.Text = pc.TotalPhysicalMemory / 1024 / 1024 + "M";//总物理内存
            textBox2.Text = pc.AvailablePhysicalMemory / 1024 / 1024 + "M";//可用物理内存
            textBox3.Text = pc.TotalVirtualMemory / 1024 / 1024 + "M";//总虚拟内存
            textBox4.Text = pc.AvailableVirtualMemory / 1024 / 1024 + "M";//可用虚拟内存

3,其他常用WMI查询语句：