/// <summary>
/// Gets a list of devices that match the filter criteria.
/// </summary>
/// <param name="deviceFilter">The device filter.</param>
/// <returns>An array of DeviceInformation objects.</returns>
public static DeviceInformation[] GetDevices(DeviceFilter deviceFilter)
{
List <DeviceInformation> result = new List <DeviceInformation>();
Guid emptyGuid = Guid.Empty;
int filter;
if (deviceFilter == DeviceFilter.AllDevices || deviceFilter == DeviceFilter.AllPciDevices)
{
filter = (int)DIGCF.DIGCF_ALLCLASSES;
}
else
{
filter = (int)DIGCF.DIGCF_ALLCLASSES | (int)DIGCF.DIGCF_PRESENT;
}
IntPtr deviceInfoSet =
Win32SetupApi.SetupDiGetClassDevs(
ref emptyGuid,
IntPtr.Zero,
IntPtr.Zero,
filter);
SP_DEVINFO_DATA deviceInfoData =
new SP_DEVINFO_DATA();
deviceInfoData.Size = Marshal.SizeOf(typeof(SP_DEVINFO_DATA));
for (int i = 0; Win32SetupApi.SetupDiEnumDeviceInfo(deviceInfoSet, i, ref deviceInfoData); i++)
{
DeviceInformation deviceInformation =
GetDeviceInformation(deviceInfoSet, deviceInfoData);
switch (deviceFilter)
{
case DeviceFilter.PresentPciDevices:
case DeviceFilter.AllPciDevices:
if (!deviceInformation.LocationInfo
.ToLowerInvariant().Contains("pci"))
{
continue; // relates to the for-loop
}
else
{
break; // relates to the switch
}
case DeviceFilter.AllDevices:
default:
break;
}
result.Add(deviceInformation);
}
Win32SetupApi.SetupDiDestroyDeviceInfoList(deviceInfoSet);
return(result.ToArray());
}
/// <summary>
/// Gets a device handle from matching.
/// </summary>
/// <param name="deviceInformation">The device information.</param>
/// <param name="deviceInfoSet">The device info set.</param>
/// <param name="deviceInfoData">The device info data.</param>
private static void GetDeviceHandleFromMatch(
DeviceInformation deviceInformation,
out IntPtr deviceInfoSet,
out SP_DEVINFO_DATA deviceInfoData)
{
Guid emptyGuid = Guid.Empty;
deviceInfoSet = Win32SetupApi.SetupDiGetClassDevs(
ref emptyGuid,
IntPtr.Zero,
IntPtr.Zero,
(int)DIGCF.DIGCF_PRESENT | (int)DIGCF.DIGCF_ALLCLASSES);
deviceInfoData = new SP_DEVINFO_DATA();
deviceInfoData.Size = Marshal.SizeOf(typeof(SP_DEVINFO_DATA));
for (int i = 0; Win32SetupApi.SetupDiEnumDeviceInfo(deviceInfoSet, i, ref deviceInfoData); i++)
{
String matchSubjectDesc = GetDescription(deviceInfoSet, deviceInfoData);
String matchSubjectPhysDevName = GetPhysicalDeviceObjectName(deviceInfoSet, deviceInfoData);
int matchSubjectBus = GetBusNumber(deviceInfoSet, deviceInfoData);
if (
deviceInformation.Description.Equals(matchSubjectDesc) &&
deviceInformation.BusNumber.Equals(matchSubjectBus) &&
deviceInformation.PhysicalDeviceObjectName.Equals(matchSubjectPhysDevName))
{
return;
}
}
deviceInfoData = new SP_DEVINFO_DATA();
deviceInfoSet = IntPtr.Zero;
}
