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P3D v4 RequestDataOnSimObject [Solved]

DragonflightDesign

DragonflightDesign

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northernireland
Gotta 'nother problem (sigh). It's vb.Net again and I can say two things before proceeding: the C++ equivalent works perfectly and if I use RequestDataOnSimObjectByType triggered from an event timer then it also works perfectly. This, however, never triggers except when the P3D connection is doing its startup checks.

Code: 
p3d_simconnect.RequestDataOnSimObject(P3Data.REQUEST_FUEL, P3Data.DEFINE_FUEL_TANKS, LockheedMartin.Prepar3D.SimConnect.SIMCONNECT_SIMOBJECT_TYPE.USER, SIMCONNECT_PERIOD.SECOND, 0, 0, 0, 0)
Code: 
    Friend Sub p3d_simconnect_OnRecvSimobjectData(ByVal sender As SimConnect, ByVal data As SIMCONNECT_RECV_SIMOBJECT_DATA)
        Select Case data.dwDefineID      {or Select Case data.dwRequestID}
            Case P3Data.REQUEST_FUEL
                Dim fuel As Fuel_Data = CType(data.dwData(0), Fuel_Data)
        End Select
Why am I using vb.Net? because I'm far more comfortable creating GUIs in vb.Net or C# than I am in C++.
 
Yah, well, it had to be something stupid. Missed a field out:
Code: 
p3d_simconnect.RequestDataOnSimObject(P3Data.REQUEST_FUEL, P3Data.DEFINE_FUEL_TANKS, SIMCONNECT_SIMOBJECT_TYPE.USER, SIMCONNECT_PERIOD.SECOND, SIMCONNECT_DATA_REQUEST_FLAG.DEFAULT, 0, 0, 0)
Even though you have a timing flag (SIMCONNECT_PERIOD) you still have to add the REQUEST _FLAG and no, you won't find it in the SDK.
 
It gets better Bill. If you check the description for the VBManagedDataRequest it states that it illustrates the use of RequestDataOnSimObject. Err....

I spent an hour on websearching and found a few very well written questions on different fora (including here) asking about the method. Not one single one of those questions had attracted an answer. The answer finally came up as an irrelevance in a code illustration for an unrelated question.

I really, really hate to admit this; I bought a book today on creating GUIs using MFC just so I could avoid these problems.
 
Last edited:
Have you by any chance checked the P3Dv4.xxx SDK to see if this omission has carried through? If it has I'll try to remember to mention it to the L-M team so they can correct it. :pushpin:
 
Still in the latest 4.5 release...

Simconnect API | Samples | Samples | scroll down to Managed Code Samples | scroll down to VB Data Request | right hand column.

Should be SIMCONNECT_RECV_SIMOBJECT_DATA_BYTYPE only.
 
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