internal static extern bool GetDeviceProperty(
IntPtr hInfoList,
ref SP_DEVINFO_DATA deviceInfoData,
ref DEVPROPKEY devicePropertyKey,
[MarshalAs(UnmanagedType.U4)] out DevicePropertyType devicePropertyType,
IntPtr propertyBuffer,
int propertyBufferSize,
out int requiredBufferSize,
int flags);
/// <summary>
/// Gets a property from the registry. See the <see cref="DevicePropertyType"/> enumeration for more information.
/// </summary>
/// <param name="devicePropertyType">The name of the property to retrieve.</param>
/// <returns></returns>
public object this[DevicePropertyType devicePropertyType]
{
get
{
object temp;
mDeviceProperties.TryGetValue(devicePropertyType.ToString(), out temp);
return(temp);
}
}
internal static string ToSerializedValue(this DevicePropertyType value)
{
switch (value)
{
case DevicePropertyType.String:
return("string");
case DevicePropertyType.Number:
return("number");
case DevicePropertyType.Boolean:
return("boolean");
case DevicePropertyType.DateTime:
return("date_time");
}
return(null);
}
/// <summary>
///
/// </summary>
/// <param name="device"></param>
/// <param name="propertyKey"></param>
/// <param name="propertyDataType"></param>
/// <param name="requiredSize"></param>
/// <returns></returns>
public static bool GetDeviceProperty(DeviceInfo device, DevicePropertyKey propertyKey,
out DevicePropertyType propertyDataType, out int requiredSize)
{
var deviceInfoList = device.InfoSet.InfoSet;
var deviceInfoData = device.InfoData;
var devicePropertyKey = propertyKey.PropertyKey;
var success = GetDeviceProperty(deviceInfoList, ref deviceInfoData, ref devicePropertyKey,
out propertyDataType, IntPtr.Zero, 0, out requiredSize, 0);
if (!success)
{
var lastError = ErrorHelpers.GetLastError();
return(lastError == ErrorCode.InsufficientBuffer);
}
return(true);
}
public static DevicePropertyValue Create(DevicePropertyType type, byte[] data)
{
switch (type)
{
case DevicePropertyType.UInt32:
return(new DevicePropertyValueUInt32(type, data));
case DevicePropertyType.Guid:
return(new DevicePropertyValueGuid(type, data));
case DevicePropertyType.String:
return(new DevicePropertyValueString(type, data));
case DevicePropertyType.StringList:
return(new DevicePropertyValueStringList(type, data));
}
throw new NotImplementedException($"DevPropType {type} is not implemented");
}
/// <summary>
///
/// </summary>
/// <param name="device"></param>
/// <param name="propertyKey"></param>
/// <param name="propertyDataType"></param>
/// <param name="propertyData"></param>
/// <returns></returns>
public static bool GetDeviceProperty(DeviceInfo device, DevicePropertyKey propertyKey,
out DevicePropertyType propertyDataType, out Api.Buffer propertyData)
{
var deviceInfoList = device.InfoSet.InfoSet;
var deviceInfoData = device.InfoData;
var devicePropertyKey = propertyKey.PropertyKey;
propertyData = new Api.Buffer();
int requiredSize;
// Keep trying until we've got success or an unrecoverable error.
while (true)
{
var success = GetDeviceProperty(deviceInfoList, ref deviceInfoData, ref devicePropertyKey,
out propertyDataType, propertyData.Data, propertyData.Length, out requiredSize, 0);
// If the data was read successfully, truncate the buffer to match the length read.
if (success)
{
propertyData.Truncate(requiredSize);
return(true);
}
// If the last error was for anything except the buffer being too small, cleanly get rid of the buffer
// before returning failure.
var lastError = ErrorHelpers.GetLastError();
if (lastError != ErrorCode.InsufficientBuffer)
{
propertyData.Dispose();
propertyData = null;
return(false);
}
// Resize the buffer to the required length before trying again.
propertyData.Resize(requiredSize);
}
}
/// <summary>
/// Gets a property from the registry. See the <see cref="DevicePropertyType"/> enumeration for more information.
/// </summary>
/// <param name="devicePropertyType">The name of the property to retrieve.</param>
/// <returns></returns>
public object this[DevicePropertyType devicePropertyType]
{
get
{
object temp;
mDeviceProperties.TryGetValue(devicePropertyType.ToString(), out temp);
return temp;
}
}
public DevicePropertyValueStringList(DevicePropertyType type, byte[] data) : base(type)
{
Value = data.SeparateRegMultiSz();
}
public DevicePropertyValueString(DevicePropertyType type, byte[] data) : base(type)
{
Value = Encoding.Unicode.GetString(data);
}
public DevicePropertyValueGuid(DevicePropertyType type, byte[] data) : base(type)
{
Value = new Guid(data);
}
public DevicePropertyValueUInt32(DevicePropertyType type, byte[] data) : base(type)
{
Value = BitConverter.ToUInt32(data, 0);
}
protected DevicePropertyValue(DevicePropertyType type)
{
Type = type;
}