A C# (Mono) library that uses the ExtPlane plugin to ease communication with X-Plane on all platforms. Inspired by the ExtPlaneInterface library for Java by pau662.

GNU GPLv3

Copyright (C) 2015 Johan Johansson.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.

The project is built with .NET 4.5 and Mono in the Xamarin Studio IDE but should be compatible with Visual Studio. A prebuilt release DLL can be found in the build folder.

You need X-Plane (demo works fine) with the ExtPlane plugin installed. The library is built against .NET 4.5 (Mono).

Make sure X-Plane is started and the plugin is installed and active.

var iface = new ExtPlaneNet.ExtPlaneInterface();
iface.Connect();

This connects to the ExtPlane plugin with the default parameters (can be changed in the constructor). The connection process is synchronous.

When connected, you must subscribe to datarefs to be able to read or write them. Full list of datarefs: https://www.xsquawkbox.net/xpsdk/docs/DataRefs.txt. Subscribing to datarefs is done asynchronously.

// subscribe to a dataref (engine throttle lever positions)
iface.Subscribe<float[]>("sim/flightmodel/engine/ENGN_thro");
// this does the same, but specified an accuracy of 0.3 and a delegate method that should be called automatically whenever the dataref value changes
iface.Subscribe<float[]>("sim/flightmodel/engine/ENGN_thro", 0.3f, (dataRef) =>
{
    Console.WriteLine(string.Format("Dataref changed: {0} = {1}", dataRef.Name, string.Join(",", dataRef.Value)));
});

When subscribed to a dataref, you can get and set its value. As seen above you can also observe the value with an event handler.

Getting datarefs is immediate (buffered) - setting dataref values is done asynchronously.

// get a dataref
DataRef<float[]> dataRef = iface.GetDataRef<float[]>("sim/flightmodel/engine/ENGN_thro");
// set the value of a dataref
iface.SetDataRef<float[]>(dataRef.Name, new float[] { 1, 1 });

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