public UsbDeviceProperty GetProperty(UsbDeviceWinApi.DEVPROPKEY devPropKey)
{
for (Int32 i = 0; i < this.Properties.Length; i++)
{
if (this.Properties[i].HasSameKey(devPropKey))
{
return(this.Properties[i]);
}
}
return(null);
}
public String GetDescription()
{
foreach (FieldInfo field in typeof(UsbDeviceWinApi.DevicePropertyKeys).GetFields(BindingFlags.Static | BindingFlags.Public))
{
UsbDeviceWinApi.DEVPROPKEY devPropKey = (UsbDeviceWinApi.DEVPROPKEY)field.GetValue(null);
if (this.HasSameKey(devPropKey))
{
return(field.Name);
}
}
return(String.Format("{0:B}, {1}", this.Key.Fmtid, this.Key.Pid));
}
internal UsbDeviceProperty(UsbDeviceWinApi.DEVPROPKEY key, Object value, UInt32 type)
{
this.Key = key;
this.Value = value;
this.Type = type;
}
private UsbDeviceProperty[] GetProperties()
{
UInt32 propertyKeyCount;
Boolean success = UsbDeviceWinApi.SetupDiGetDevicePropertyKeys(this.handle, ref this.devInfoData, IntPtr.Zero, 0, out propertyKeyCount, 0);
if (success || (Marshal.GetLastWin32Error() != UsbDeviceWinApi.ERROR_INSUFFICIENT_BUFFER))
{
this.TraceError("SetupDiGetDevicePropertyKeys");
return new UsbDeviceProperty[0];
}
if (0 == propertyKeyCount)
{
return new UsbDeviceProperty[0];
}
List<UsbDeviceProperty> properties = new List<UsbDeviceProperty>();
UsbDeviceWinApi.DEVPROPKEY[] propertyKeyArray = new UsbDeviceWinApi.DEVPROPKEY[propertyKeyCount];
GCHandle propertyKeyArrayPinned = GCHandle.Alloc(propertyKeyArray , GCHandleType.Pinned);
IntPtr buffer = propertyKeyArrayPinned.AddrOfPinnedObject();
success = UsbDeviceWinApi.SetupDiGetDevicePropertyKeys(this.handle, ref this.devInfoData, buffer, propertyKeyCount, out propertyKeyCount, 0);
if (success)
{
for (UInt32 propertyKeyIndex = 0; propertyKeyIndex < propertyKeyCount; propertyKeyIndex++)
{
UInt32 propertyType;
UInt32 requiredSize;
success = UsbDeviceWinApi.SetupDiGetDevicePropertyW(this.handle, ref this.devInfoData,
ref propertyKeyArray[propertyKeyIndex], out propertyType, IntPtr.Zero, 0, out requiredSize, 0);
if (success || (Marshal.GetLastWin32Error() != UsbDeviceWinApi.ERROR_INSUFFICIENT_BUFFER))
{
this.TraceError("SetupDiGetDeviceProperty");
success = false;
}
else
{
buffer = Marshal.AllocHGlobal((Int32)requiredSize);
success = UsbDeviceWinApi.SetupDiGetDevicePropertyW(this.handle, ref this.devInfoData,
ref propertyKeyArray[propertyKeyIndex], out propertyType, buffer, requiredSize, out requiredSize, 0);
if (success)
{
Object value = this.MarshalDeviceProperty(buffer, (Int32)requiredSize, propertyType);
properties.Add(new UsbDeviceProperty(propertyKeyArray[propertyKeyIndex], value, propertyType));
}
else
{
this.TraceError("SetupDiGetDevicePropertyW");
}
Marshal.FreeHGlobal(buffer);
}
if (!success) // don't combine with previous "if", covers 2 cases
{
properties.Add(new UsbDeviceProperty(propertyKeyArray[propertyKeyIndex], null, UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_EMPTY));
}
}
}
else
{
this.TraceError("SetupDiGetDevicePropertyKeys");
}
propertyKeyArrayPinned.Free();
return properties.ToArray();
}
private UsbDeviceProperty[] GetProperties()
{
UInt32 propertyKeyCount;
Boolean success = UsbDeviceWinApi.SetupDiGetDevicePropertyKeys(this.handle, ref this.devInfoData, IntPtr.Zero, 0, out propertyKeyCount, 0);
if (success || (Marshal.GetLastWin32Error() != UsbDeviceWinApi.ERROR_INSUFFICIENT_BUFFER))
{
this.TraceError("SetupDiGetDevicePropertyKeys");
return(new UsbDeviceProperty[0]);
}
if (0 == propertyKeyCount)
{
return(new UsbDeviceProperty[0]);
}
List <UsbDeviceProperty> properties = new List <UsbDeviceProperty>();
UsbDeviceWinApi.DEVPROPKEY[] propertyKeyArray = new UsbDeviceWinApi.DEVPROPKEY[propertyKeyCount];
GCHandle propertyKeyArrayPinned = GCHandle.Alloc(propertyKeyArray, GCHandleType.Pinned);
IntPtr buffer = propertyKeyArrayPinned.AddrOfPinnedObject();
success = UsbDeviceWinApi.SetupDiGetDevicePropertyKeys(this.handle, ref this.devInfoData, buffer, propertyKeyCount, out propertyKeyCount, 0);
if (success)
{
for (UInt32 propertyKeyIndex = 0; propertyKeyIndex < propertyKeyCount; propertyKeyIndex++)
{
UInt32 propertyType;
UInt32 requiredSize;
success = UsbDeviceWinApi.SetupDiGetDevicePropertyW(this.handle, ref this.devInfoData,
ref propertyKeyArray[propertyKeyIndex], out propertyType, IntPtr.Zero, 0, out requiredSize, 0);
if (success || (Marshal.GetLastWin32Error() != UsbDeviceWinApi.ERROR_INSUFFICIENT_BUFFER))
{
this.TraceError("SetupDiGetDeviceProperty");
success = false;
}
else
{
buffer = Marshal.AllocHGlobal((Int32)requiredSize);
success = UsbDeviceWinApi.SetupDiGetDevicePropertyW(this.handle, ref this.devInfoData,
ref propertyKeyArray[propertyKeyIndex], out propertyType, buffer, requiredSize, out requiredSize, 0);
if (success)
{
Object value = this.MarshalDeviceProperty(buffer, (Int32)requiredSize, propertyType);
properties.Add(new UsbDeviceProperty(propertyKeyArray[propertyKeyIndex], value, propertyType));
}
else
{
this.TraceError("SetupDiGetDevicePropertyW");
}
Marshal.FreeHGlobal(buffer);
}
if (!success) // don't combine with previous "if", covers 2 cases
{
properties.Add(new UsbDeviceProperty(propertyKeyArray[propertyKeyIndex], null, UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_EMPTY));
}
}
}
else
{
this.TraceError("SetupDiGetDevicePropertyKeys");
}
propertyKeyArrayPinned.Free();
return(properties.ToArray());
}
public Object GetPropertyValue(UsbDeviceWinApi.DEVPROPKEY devPropKey)
{
UsbDeviceProperty usbDeviceProperty = this.GetProperty(devPropKey);
return(null == usbDeviceProperty ? null : usbDeviceProperty.Value);
}
internal UsbDeviceProperty(UsbDeviceWinApi.DEVPROPKEY key, Object value, UInt32 type)
{
this.Key = key;
this.Value = value;
this.Type = type;
}
public Boolean HasSameKey(UsbDeviceWinApi.DEVPROPKEY devPropKey)
{
return((this.Key.Fmtid == devPropKey.Fmtid) && (this.Key.Pid == devPropKey.Pid));
}
