internal static string GetDeviceInterfaceName(Guid class_guid)
{
DeviceProperty prop = GetProperty(class_guid, true, DevicePropertyKeys.DEVPKEY_DeviceInterfaceClass_Name);
if (prop?.Type == DEVPROPTYPE.STRING)
{
return(prop.GetString());
}
prop = GetProperty(class_guid, true, DevicePropertyKeys.DEVPKEY_NAME);
if (prop?.Type == DEVPROPTYPE.STRING)
{
return(prop.GetString());
}
return(DeviceInterfaceClassGuids.GuidToName(class_guid));
}
internal static string GetDeviceName(int devinst)
{
DeviceProperty prop = GetProperty(devinst, DevicePropertyKeys.DEVPKEY_Device_FriendlyName);
if (prop?.Type == DEVPROPTYPE.STRING)
{
return(prop.GetString());
}
prop = GetProperty(devinst, DevicePropertyKeys.DEVPKEY_NAME);
if (prop?.Type == DEVPROPTYPE.STRING)
{
return(prop.GetString());
}
return(GetProperty(devinst, DevicePropertyKeys.DEVPKEY_Device_DeviceDesc)?.GetString() ?? string.Empty);
}
internal static DeviceProperty GetProperty(string link_path, DEVPROPKEY key)
{
DeviceProperty ret = new DeviceProperty()
{
Name = DevicePropertyKeys.KeyToName(key), FmtId = key.fmtid, Pid = key.pid, Data = new byte[0]
};
using (var buffer = GetDeviceInterfaceProperty(link_path, key, out DEVPROPTYPE type, false).GetResultOrDefault()) {
if (buffer != null)
{
ret.Type = type;
ret.Data = buffer.ToArray();
}
}
return(ret);
}
internal static DeviceProperty GetProperty(int devinst, DEVPROPKEY key)
{
DeviceProperty ret = new DeviceProperty()
{
Name = DevicePropertyKeys.KeyToName(key), FmtId = key.fmtid, Pid = key.pid, Data = new byte[0]
};
using (var buffer = new SafeHGlobalBuffer(2000)) {
int length = buffer.Length;
if (DeviceNativeMethods.CM_Get_DevNode_PropertyW(devinst, key, out DEVPROPTYPE type, buffer, ref length, 0) == CrError.SUCCESS)
{
ret.Type = type;
ret.Data = buffer.ReadBytes(length);
}
}
return(ret);
}
internal static DeviceProperty GetProperty(Guid class_guid, bool interface_guid, DEVPROPKEY key)
{
DeviceProperty ret = new DeviceProperty()
{
Name = DevicePropertyKeys.KeyToName(key), FmtId = key.fmtid, Pid = key.pid, Data = new byte[0]
};
using (var buffer = GetClassProperty(class_guid, interface_guid ? CmClassType.Interface : CmClassType.Installer,
key, out DEVPROPTYPE type, false).GetResultOrDefault()) {
if (buffer != null)
{
ret.Type = type;
ret.Data = buffer.ToArray();
}
}
return(ret);
}
internal static DeviceProperty[] GetDeviceProperties(int dev_inst)
{
int count = 0;
DeviceProperty[] props = new DeviceProperty[0];
DeviceNativeMethods.CM_Get_DevNode_Property_Keys(dev_inst, null, ref count, 0);
if (count == 0)
{
return(new DeviceProperty[0]);
}
DEVPROPKEY[] keys = new DEVPROPKEY[count];
if (DeviceNativeMethods.CM_Get_DevNode_Property_Keys(dev_inst, keys, ref count, 0) != CrError.SUCCESS)
{
return(new DeviceProperty[0]);
}
return(keys.Take(count).Select(k => GetProperty(dev_inst, k)).ToArray());
}
