I am working on a project in which I need to be able to detect when a CD or a USB drive is inserted or removed. I found some source code that was supposed to do this very thing, however, nothing seems to happen when I insert or eject a CD.
Could someone please verify that the source is correct, and give me any pointers as to what I may have done wrong here?
public class MyWindow
{
ManagementEventWatcher w;
private void MyWindow_Loaded(object sender, RoutedEventArgs e)
{
WqlEventQuery query = new WqlEventQuery("__InstanceCreationEvent", new TimeSpan(0, 0, 1), @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 2");
ConnectionOptions opt = new ConnectionOptions();
opt.EnablePrivileges = true;
ManagementScope ms = new ManagementScope("root\\CIMV2", opt);
w = new ManagementEventWatcher(ms, query);
w.EventArrived += new EventArrivedEventHandler(w_EventArrived);
w.Start();
}
private void w_EventArrived(object sender, EventArrivedEventArgs e)
{
PropertyData pd = e.NewEvent.Properties["TargetInstance"];
}
}
When I set a breakpoint on the "PropertyData pd = ..." line, it never gets hit when I eject/insert a CD. Since I've not messed with this at all, and all of the examples I've seen online simply cite this same source code (with minor variations)
using System.Management;
public void networkDevice()
{
try
{
WqlEventQuery q = new WqlEventQuery();
q.EventClassName = "__InstanceModificationEvent";
q.WithinInterval = new TimeSpan(0, 0, 1);
q.Condition = @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 5";
ConnectionOptions opt = new ConnectionOptions();
opt.EnablePrivileges = true;
opt.Authority = null;
opt.Authentication = AuthenticationLevel.Default;
//opt.Username = "Administrator";
//opt.Password = "";
ManagementScope scope = new ManagementScope("\\root\\CIMV2", opt);
ManagementEventWatcher watcher = new ManagementEventWatcher(scope, q);
watcher.EventArrived += new EventArrivedEventHandler(watcher_EventArrived);
watcher.Start();
}
catch (ManagementException e)
{
Console.WriteLine(e.Message);
}
}
void watcher_EventArrived(object sender, EventArrivedEventArgs e)
{
ManagementBaseObject wmiDevice = (ManagementBaseObject)e.NewEvent["TargetInstance"];
string driveName = (string)wmiDevice["DeviceID"];
Console.WriteLine(driveName);
Console.WriteLine(wmiDevice.Properties["VolumeName"].Value);
Console.WriteLine((string)wmiDevice["Name"]);
if (wmiDevice.Properties["VolumeName"].Value != null)
Console.WriteLine("CD has been inserted");
else
Console.WriteLine("CD has been ejected");
}
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