private void hddThreadActivity()
{
using (ManagementClass physicalDriveData = new ManagementClass("Win32_PerfFormattedData_PerfDisk_PhysicalDisk"))
{
//Using WMI to get physical disk activity per second.
while (true)
{
//Queries WMI at each itteration and gets the new values.
//Gets the instances of all physical drives in the system(separately) and a Total instance (all drives on the system combined).
ManagementObjectCollection physicalDriveDataCollection = physicalDriveData.GetInstances();
//finds total instance
foreach (ManagementObject obj in physicalDriveDataCollection)
{
//Process only the _Total instance, and ignore all the others.
if (obj["Name"].ToString() == "_Total")
{
//Getting the DiskBytesPersec property
//unsigned 64bit intenger,return value needs to be converted.
if (Convert.ToUInt64(obj["DIskBytesPersec"]) > 0)
{
if (previousHddState == HddState.Idle)
{
//Show busy icon.
hddTrayIcon.Icon = busyIcon;
}
previousHddState = HddState.Busy;
}
else
{
if (previousHddState == HddState.Busy)
{
//Show idle icon.
hddTrayIcon.Icon = idleIcon;
}
previousHddState = HddState.Idle;
}
}
}
if (exitRequested)
{
return;
}
else
{
//Sleep for 10th of a second
Thread.Sleep(100);
}
}
}
}
private void setUpIcons()
{
//Instantiating icon objects, and joining adequate .ico images.
busyIcon = new Icon("images\\HDD_Busy.ico");
idleIcon = new Icon("images\\HDD_Idle.ico");
hddTrayIcon = new NotifyIcon();
//Assinging default idleIcon to the tray icon and making it visible.
hddTrayIcon.Icon = idleIcon;
hddTrayIcon.Visible = true;
previousHddState = HddState.Idle;
}
