internal KeyboardDeviceInfo(IntPtr handle, string name, KeyboardDeviceType type, string description)
{
Handle = handle;
Name = name;
Type = type;
Description = description;
}
/// <summary>
/// Gets the list of all keyboard devices.
/// </summary>
/// <returns>List of all keyboard devices</returns>
public static IEnumerable <KeyboardDeviceInfo> Get()
{
lock (singleThreadLock)
{
uint deviceCount = 0;
if (GetRawInputDeviceList(IntPtr.Zero, ref deviceCount, (uint)inputDeviceElementSize) == 0)
{
var pRawInputDeviceList = Marshal.AllocHGlobal((int)(inputDeviceElementSize * deviceCount));
GetRawInputDeviceList(pRawInputDeviceList, ref deviceCount, (uint)inputDeviceElementSize);
for (var i = 0; i < deviceCount; i++)
{
uint pcbSize = 0;
// On Window 8 64bit when compiling against .Net > 3.5 using .ToInt32 you will generate an arithmetic overflow. Leave as it is for 32bit/64bit applications
var inputDevice = (InputDevice)Marshal.PtrToStructure(new IntPtr((pRawInputDeviceList.ToInt64() + (inputDeviceElementSize * i))), typeof(InputDevice));
GetRawInputDeviceInfo(inputDevice.Handle, 0x20000007 /*RIDI_DEVICENAME*/, IntPtr.Zero, ref pcbSize);
if (pcbSize <= 0)
{
continue;
}
IntPtr pData = IntPtr.Zero;
KeyboardDeviceType deviceType = KeyboardDeviceType.Other;
if (inputDevice.Type == 1)
{
deviceType = KeyboardDeviceType.Keyboard;
}
else if (inputDevice.Type == 2)
{
deviceType = KeyboardDeviceType.Hid;
}
try
{
pData = Marshal.AllocHGlobal((int)pcbSize);
GetRawInputDeviceInfo(inputDevice.Handle, 0x20000007 /*RIDI_DEVICENAME*/, pData, ref pcbSize);
var deviceName = Marshal.PtrToStringAnsi(pData);
if (deviceType != KeyboardDeviceType.Other)
{
var name = Marshal.PtrToStringAnsi(pData);
var description = GetDeviceDescription(deviceName);
var device = new KeyboardDeviceInfo(inputDevice.Handle, name, deviceType, description);
yield return(device);
}
}
finally
{
if (pData != IntPtr.Zero)
{
Marshal.FreeHGlobal(pData);
}
}
}
}
}
}
public KeyboardDeviceInfo(string friendlyName, string deviceName, KeyboardDeviceType deviceType)
{
this.FriendlyName = friendlyName ?? throw new ArgumentNullException(nameof(friendlyName));
this.DeviceName = deviceName ?? throw new ArgumentNullException(nameof(deviceName));
this.DeviceType = deviceType;
}
