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I am getting into SimConnect using the default SimConnect (SP2) from Microsoft.
In my code I instantiate an FSXUtil, do an OpenConnection, make sure it is connected and then call GetPosition() . I see the request is sent but the receive event handler, although registered, never gets any data back from FSX/SimConnect.
Here is the FSXUtil class:
What am I doing wrong ehre? this is like the SDK says it should be done, yet it doesn't work. Like I said, there is a connection, tried with both FSX and without FSX and when FSX is on then it connects properly but that is about it.
In my code I instantiate an FSXUtil, do an OpenConnection, make sure it is connected and then call GetPosition() . I see the request is sent but the receive event handler, although registered, never gets any data back from FSX/SimConnect.
Here is the FSXUtil class:
Code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices; // Needed for SimConnect
using Microsoft.FlightSimulator.SimConnect; // The SimConnect library (add reference to FSX SDK DLL)
namespace TestSimConnect
{
/// <summary>
/// The data containers that collect data from the simulator
/// </summary>
enum FsxRequestDefinition
{
GeoPositionData
}
/// <summary>
/// The types of requests made to FSX
/// </summary>
enum FsxRequest
{
RequestPosition
}
/// <summary>
///
/// </summary>
/// <remarks>The StructLayout metatag is used to declara a data structure
/// so that SimConnect knows how to fill it or read it.
/// </remarks>
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
struct GeoPositionData
{
// this is how you declare a fixed size string
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
public String Title;
public double Latitude;
public double Longitude;
public double Altitude;
};
/// <summary>
/// Utility class to marshall requests to FSX using SimConnect
/// </summary>
internal class FSXUtil
{
private string clientName = "CTFSX";
private IntPtr clientHandle = IntPtr.Zero;
private SimConnect simConnect = null;
const int WM_USER_SIMCONNECT = 0x0402; // user-defined Win32 event
/// <summary>
/// Ctor.
/// </summary>
/// <param name="handle">Handle of the GUI form corresponding to client application. i.e. this.Handle</param>
/// <param name="friendlyName">Friendly name of the application</param>
internal FSXUtil(IntPtr handle, string friendlyName)
{
if (handle == IntPtr.Zero)
throw new ArgumentNullException("Handle to application was not given");
else
clientHandle = handle;
if (!string.IsNullOrEmpty(friendlyName))
clientName = friendlyName.Trim();
}
/// <summary>
/// Open a connection to the SimConnect server, in other words the FSX application. It is required
/// that the FSX application has been configured to enable SimConnect (see FSX documentation)
/// </summary>
/// <returns>true on success, false if unable to connect</returns>
internal bool OpenConnection()
{
bool success = true;
try
{
simConnect = new SimConnect(this.clientName, this.clientHandle, WM_USER_SIMCONNECT, null, 0);
InitDataRequest();
}
catch (COMException cex)
{ // A former HRESULT error results in a COM Exception in managed code
// TODO: A connection to the SimConnect server could not be established.
success = false;
Console.WriteLine(String.Format("SimConnect.Open() : {0}", cex.Message));
}
return success;
}
/// <summary>
/// Setup all the SimConnect related data definitions and event handlers
/// </summary>
private void InitDataRequest()
{
try
{
// listen to connect and quit msgs
simConnect.OnRecvOpen += new SimConnect.RecvOpenEventHandler(simConnect_OnRecvOpen);
simConnect.OnRecvQuit += new SimConnect.RecvQuitEventHandler(simConnect_OnRecvQuit);
// listen to exceptions
simConnect.OnRecvException += new SimConnect.RecvExceptionEventHandler(simConnect_OnRecvException);
// define a data structure
simConnect.AddToDataDefinition(FsxRequestDefinition.GeoPositionData, "Title", null, SIMCONNECT_DATATYPE.STRING256, 0.0f, SimConnect.SIMCONNECT_UNUSED);
simConnect.AddToDataDefinition(FsxRequestDefinition.GeoPositionData, "A/C Latitude", "degrees", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED);
simConnect.AddToDataDefinition(FsxRequestDefinition.GeoPositionData, "A/C Longitude", "degrees", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED);
simConnect.AddToDataDefinition(FsxRequestDefinition.GeoPositionData, "A/C Altitude", "feet", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED);
// IMPORTANT: register it with the simconnect managed wrapper marshaller
// if you skip this step, you will only receive a uint in the .dwData field.
simConnect.RegisterDataDefineStruct<GeoPositionData>(FsxRequestDefinition.GeoPositionData);
// catch a simobject data request
simConnect.OnRecvSimobjectDataBytype += new SimConnect.RecvSimobjectDataBytypeEventHandler(simConnect_OnRecvSimobjectDataBytype);
}
catch (COMException ex)
{
Console.WriteLine(ex.Message);
}
}
/// <summary>
/// Close the connection to the SimConnect server
/// </summary>
internal void CloseConnection()
{
if (simConnect != null)
{
simConnect.Dispose();
simConnect = null;
}
}
/// <summary>
/// Send a request to retrieve the current position of the aircraft and
/// receive the result asynchronously.
/// </summary>
internal void GetPosition()
{
simConnect.RequestDataOnSimObjectType(
FsxRequest.RequestPosition,
FsxRequestDefinition.GeoPositionData,
0,
SIMCONNECT_SIMOBJECT_TYPE.USER);
System.Diagnostics.Debug.WriteLine("Request GeoPosition sent.");
Console.WriteLine("Request GeoPosition sent.");
}
#region SimConnect Event Handlers
/// <summary>
/// We are now connected to the SimConnect FSX server
/// </summary>
/// <param name="sender"></param>
/// <param name="data"></param>
void simConnect_OnRecvOpen(SimConnect sender, SIMCONNECT_RECV_OPEN data)
{
System.Diagnostics.Debug.WriteLine("Connected to FSX");
Console.WriteLine("Connected to FSX");
}
/// <summary>
/// The user closed/exited Flight Simulator X
/// </summary>
/// <param name="sender"></param>
/// <param name="data"></param>
void simConnect_OnRecvQuit(SimConnect sender, SIMCONNECT_RECV data)
{
System.Diagnostics.Debug.WriteLine("FSX has exited");
Console.WriteLine("FSX has exited");
CloseConnection();
}
/// <summary>
/// We received an exception from SymConnect server
/// </summary>
/// <param name="sender"></param>
/// <param name="data"></param>
void simConnect_OnRecvException(SimConnect sender, SIMCONNECT_RECV_EXCEPTION data)
{
System.Diagnostics.Debug.WriteLine("Exception received: " + data.dwException);
Console.WriteLine("Exception received: " + data.dwException);
}
/// <summary>
/// This event handler receives all data from SimConnect in response to a previous
/// request.
/// </summary>
/// <param name="sender"></param>
/// <param name="data"></param>
void simConnect_OnRecvSimobjectDataBytype(SimConnect sender, SIMCONNECT_RECV_SIMOBJECT_DATA_BYTYPE data)
{
System.Diagnostics.Debug.WriteLine("Data received type: " + (FsxRequest)data.dwRequestID);
Console.WriteLine("Data received type: " + (FsxRequest)data.dwRequestID);
switch ((FsxRequest)data.dwRequestID)
{
case FsxRequest.RequestPosition:
GeoPositionData s1 = (GeoPositionData)data.dwData[0];
Console.WriteLine("Title: " + s1.Title);
Console.WriteLine("Lat: " + s1.Latitude);
Console.WriteLine("Lon: " + s1.Longitude);
Console.WriteLine("Alt: " + s1.Altitude);
break;
default:
Console.WriteLine("Unknown request ID: " + data.dwRequestID);
break;
}
}
#endregion
}
}What am I doing wrong ehre? this is like the SDK says it should be done, yet it doesn't work. Like I said, there is a connection, tried with both FSX and without FSX and when FSX is on then it connects properly but that is about it.