HidDevice Class

Definition

public ref class HidDevice sealed : IClosable

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class HidDevice final : IClosable

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class HidDevice : System.IDisposable

Public NotInheritable Class HidDevice
Implements IDisposable

Inheritance

Object Platform::Object IInspectable HidDevice

Attributes

ContractVersionAttribute MarshalingBehaviorAttribute

Implements

IClosable IDisposable

Windows requirements

Examples

For a complete sample that demonstrates how to use this class, see Custom HID device sample.

The following example demonstrates how a UWP app built with XAML and C# uses the GetDeviceSelector method to create a selector for a specific HID device (in this case, Microsoft Input Configuration Device) and then uses FromIdAsync method to open a connection to that device.

using System;
using System.Linq;
using Windows.Devices.Enumeration;
using Windows.Devices.HumanInterfaceDevice;
using Windows.Storage;
using Windows.UI.Xaml.Controls;

namespace HIDdeviceTest
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            EnumerateHidDevices();
        }

        // Find HID devices.
        private async void EnumerateHidDevices()
        {
            // Microsoft Input Configuration Device.
            ushort vendorId = 0x045E;
            ushort productId = 0x07CD;
            ushort usagePage = 0x000D;
            ushort usageId = 0x000E;

            // Create the selector.
            string selector = 
                HidDevice.GetDeviceSelector(usagePage, usageId, vendorId, productId);

            // Enumerate devices using the selector.
            var devices = await DeviceInformation.FindAllAsync(selector);

            if (devices.Any())
            {
                // At this point the device is available to communicate with
                // So we can send/receive HID reports from it or 
                // query it for control descriptions.
                info.Text = "HID devices found: " + devices.Count;

                // Open the target HID device.
                HidDevice device = 
                    await HidDevice.FromIdAsync(devices.ElementAt(0).Id,
                    FileAccessMode.ReadWrite);

                if (device != null)
                {
                    // Input reports contain data from the device.
                    device.InputReportReceived += async (sender, args) =>
                    {
                        HidInputReport inputReport = args.Report;
                        IBuffer buffer = inputReport.Data;

                        // Create a DispatchedHandler as we are interracting with the UI directly and the
                        // thread that this function is running on might not be the UI thread; 
                        // if a non-UI thread modifies the UI, an exception is thrown.

                        await this.Dispatcher.RunAsync(
                            CoreDispatcherPriority.Normal,
                            new DispatchedHandler(() =>
                            {
                                info.Text += "\nHID Input Report: " + inputReport.ToString() + 
                                "\nTotal number of bytes received: " + buffer.Length.ToString();
                            }));
                    };
                }

            }
            else
            {
                // There were no HID devices that met the selector criteria.
                info.Text = "HID device not found";
            }
        }
    }
}

Remarks

For more information about using this class, including limitations, see Supporting human interface devices (HID) and Custom HID device sample.

Apps that use this class to access a HID device must include specific DeviceCapability data in the Capabilities node of its manifest. This data identifies the device and its purpose (or function). For more information, see How to specify device capabilities for HID.

Properties

Methods

Events

Applies to

See also

• How to specify device capabilities for HID
• Supporting human interface devices (HID)
• Custom HID device sample