private void EnumerateChildren()
{
IntPtr ptrFirstChild = IntPtr.Zero;
if (Win32.CM_Get_Child_Ex(
ref ptrFirstChild,
_deviceHandle,
0,
_machineHandle) != 0)
{
return;
}
var ptrChild = ptrFirstChild;
var ptrSibling = IntPtr.Zero;
do
{
var childDevice = new DeviceNode(ptrChild, this);
_children.Add(childDevice);
if (Win32.CM_Get_Sibling_Ex(
ref ptrSibling,
ptrChild,
0,
_machineHandle) != 0)
{
break;
}
ptrChild = ptrSibling;
}while (true);
}
public DeviceNode(IntPtr deviceHandle, DeviceNode parentDevice)
: this(
deviceHandle,
parentDevice,
parentDevice._machineHandle)
{
}
public DeviceNode(
IntPtr deviceHandle,
DeviceNode parentDevice,
IntPtr machineHandle)
{
_deviceProperties = new Dictionary <int, string>();
_children = new List <DeviceNode>();
_deviceHandle = deviceHandle;
_machineHandle = machineHandle;
_parentDevice = parentDevice;
EnumerateDeviceProperties();
EnumerateChildren();
}
private void EnumerateDevices()
{
this.DisconnectFromMachine();
// local machine assumed
if (Win32.CM_Connect_Machine(
null, ref this._machineHandle) != 0)
{
return;
}
try
{
Win32.CM_Locate_DevNode_Ex(
ref this._rootDeviceHandle,
0,
0,
this._machineHandle);
// recursive enumeration
this._rootNode = new DeviceNode(
this._rootDeviceHandle,
null,
this._machineHandle);
}
finally
{
this.DisconnectFromMachine();
if (this._rootNode != null)
{
this._deviceNodes = this._rootNode
.Flatten(node => node.Children).ToList();
}
}
}
